担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：MDPI AG  

The fluctuating conditions of Lake Limboto have greatly affected the activities of people living around the lake. The shallowing and narrowing of the lake poses a significant problem to local people’s survival. The lake is predicted to disappear by 2030, which will consequentially lead to a diminishment in the productivity of the lake. This article aims to analyze how the communities around the lake respond in their daily activities to the transformation of the lake and the shocking prediction about its lifespan. This study uses an interdisciplinary approach by integrating multiple fields of study to understand and address the problems regarding this issue. This research comprised a literature review, field survey, and in-depth interview process around the lake. This research relied on the framework of cultural studies to analyze the survival and resilience of the people around the lake, gaining an understanding of their special daily activities. The results of this study show that some people are aware of the lake’s gradual recession, but they have not prepared for it, treating the problem as only a government affair. They continue to live at the lake’s shores, enduring even amidst impoverished conditions.

DOI： 10.3390/su16020704

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：MDPI AG  

Artisanal and small-scale gold mining (ASGM) harms the environment and human health, because it requires mercury (Hg). Therefore, this study uses a questionnaire survey to identify the effects of the medical checkup findings, group discussion, and educational seminar on the values of illegal miners and residents in Bunikasih, Indonesia, regarding the environmental and health effects of Hg. Transdisciplinary communities of practice (TDCoP) were formed to pursue alternative livelihoods than illegal ASGM. Environmental pollution after ASGM closure was assessed. The questionnaire showed that respondents changed their views on Hg’s effects and were willing to stop ASGM practices. In an environmental impact assessment study, tea leaf samples were obtained between the ASGM activity location and village housing in two periods during ASGM closure to identify the concentrations of Hg, lead, and arsenic. Their mean concentration values in Period 1 (2) were 0.54 ± 0.14, 0.66 ± 0.09, and 0.34 ± 0.12 mg kg−1 (0.08 ± 0.04, 0.34 ± 0.14, and 0.07 ± 0.06 mg kg−1), respectively, indicating a decrease in environmental pollution. In conclusion, the government-driven cessation of ASGM in the study area shows a reduction in environmental pollution, and the change in the perception of the participants regarding the ASGM and TDCoP approaches help to make these changes permanent.

添付ファイル： Idham Andri Kurniawan_IJERPH.pdf

DOI： 10.3390/ijerph20176663

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担当区分：責任著者   掲載種別：研究論文（学術雑誌）   出版者・発行元：EDP Sciences  

Lake Limboto is one of the key lakes with severe siltation, caused by sediment delivered by river currents. This study aims to reduce the impact of sedimentation by controlling erosion with a palm fiber net with mesh dimensions of 5 cm x 5 cm and a thickness of 5 mm. The Palm fibre installation is installed on slopes with erosion potential; each location has a different slope: location 1 has a slope of 40o, location 2 has a slope of 45°, and location 3 has a slope of 50°. With the findings obtained, palm fiber nets erosion control was shown to be effective in repelling erosion. The first site has an 8:3 ratio, the second location has a 5:2 ratio, and the third place has a 1:0.5 ratio, net performance at each location of 42% location 1, 39% location 2, 41% location 3 and 0% at location 4. Differences in soil structure and slope of the slope generate variations in the data acquired from each location.

DOI： 10.1051/e3sconf/202340001019

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掲載種別：研究論文（学術雑誌）   出版者・発行元：Universitas Negeri Gorontalo  

Sample of Arenga Pinnata (AP) fibres, ropes and nets were prepared from AP ropes using traditional tools. The ropes and nets were used as agricultural material such as vertical farming of vines (passion fruit, grape, bitter gourd, and melon) in Gorontalo and Japan. The combination of nets and vines acts as green curtain (GC) which. Could mitigate the thermal energy in outdoor as well as indoor buildings. and tested with the deformation rate of up to the point of rupture. To avoid the failure of ropes and nets on supporting the weight of the vines, the Universal Testing Machine Model WDW-50 were used to determine the ultimate tensile forces. While the physical size of the AP fibres, ropes and nets also being measured to confirm the uniformity of the individual ropes and nets

DOI： 10.34312/jpj.v5i1.19433

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担当区分：責任著者   記述言語：日本語   出版者・発行元：国土交通省北海道開発局  

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掲載種別：研究論文（学術雑誌）   出版者・発行元：MDPI AG  

Potentially toxic elements (PTEs) from natural and anthropogenic activities threaten the environment and human health. The associations of PTEs with natural hazards can be powerful and prominent mechanisms to release PTEs, considerably hastening their multiple contaminations and widespread distribution. This study primarily aimed to investigate the enhanced potential distribution of PTE contaminations (arsenic, lead, and mercury) from coexisting gold mining operations combined with massive riverbank erosion in Indonesia from 2002 to 2022, where soil and water are highly contaminated naturally, using PlanetScope smallsat constellations, Google Earth imagery, and hydrographic datasets. According to the findings, increased barren extents were found because of mining deposits and road network developments. Enhanced natural and anthropogenic PTE runoffs would be transported across two different sub-basins, affecting broader parts of the Bone River. Between 2002 and 2022, 139.3% of river expansion was identified, eroding a maximum of 3,436,139.4 m3 of contaminated soil. Particularly land surfaces were repeatedly transformed from rivers to agricultural lands in the low Bone River, possibly contaminated by fertilizer spills. The combination of PTE potentials from different sources would further exacerbate the contamination level at an estuary. These findings are expected to aid in the timely monitoring of and assuming volumes, rates, and distribution of PTEs from various natural and anthropogenic activities and alert PTE contamination risks to ecosystems and human health. Future work in this area should aim to investigate contamination levels at the estuary, where contaminated materials from both natural and anthropogenic activities are accumulated.

DOI： 10.3390/rs15030861

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：MDPI AG  

Historically, cocoa (Theobroma cacao) has been one of Ecuador’s most important export crops. In the Ponce Enriquez district, artisanal and small gold mining (ASGM), and quarrying account for 42% of economic activities, while agriculture and livestock farming account for 30%, making the analysis of their synergy and interaction key to understanding the long term viability of the different activities. In this study, we evaluated the concentration of potentially toxic metals in different parts of the cocoa plant and fruit, in relation to mining activities within the area. Gold extraction generates pollution, including potentially toxic metals such as mercury (Hg), cadmium (Cd), arsenic (As), copper (Cu), lead (Pb) and zinc (Zn). In order to understand the mobility of these metals within the cocoa plant and fruit, the analysis was conducted separately for leaves, pod, husk and cocoa bean. Concentrations of the target metals in the different plant parts and soil were measured using ICP-MS, and the mobility and risk factors were calculated using the transfer factor (TF) and the risk ratio (HQ). The results suggest that Zn, Cd and Cu are indeed moving from the soil to cocoa leaves and beans. Furthermore, the results show that the concentrations of toxic metals in the different parts of the cocoa fruit and plant, particularly in the cocoa bean, which is used for chocolate manufacture, are not higher than those regulated by FAO food standards, as is the case of Cd, which is limited to 0.2 mg Cd/kg and in the samples analyzed does not exceed this limit. Even though the concentration of these metals does not exceed the safety standard, the presence of these potentially hazardous metals, and the fact they are absorbed by this important local crop, are worrying for the long-term sustainability of cocoa cultivation in the area. Therefore, it is fundamental to monitor the local environment, understanding the distribution of heavy metal pollution, and work with the local authorities in landscape management to minimize the exposure of crops to ASGM pollution.

DOI： 10.3390/ijerph192114369

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担当区分：最終著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.3390/mining2030030

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.3390/rs14174249

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.3390/ijerph19106266

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.3390/ijerph19106094

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.3390/ijerph19095530

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担当区分：最終著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1088/1755-1315/1027/1/012028

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その他リンク： https://iopscience.iop.org/article/10.1088/1755-1315/1027/1/012028/pdf

担当区分：最終著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.3390/ijerph19095422

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担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

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担当区分：最終著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.3390/ijerph19073955

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担当区分：最終著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1080/02604027.2021.2012878

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.3390/ijerph19010530

PubMed

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担当区分：最終著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.3390/ijerph19010306

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.3390/ijerph19010033

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担当区分：筆頭著者   記述言語：日本語   掲載種別：研究論文（大学，研究機関等紀要）   出版者・発行元：国際開発学会  

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.3390/ijerph182111206

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.3390/ijerph182010954

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掲載種別：研究論文（学術雑誌）   出版者・発行元：MDPI AG  

Mining sites development have had a significant impact on local socioeconomic conditions, the environment, and sustainability. However, the transformation of camp-type artisanal and small-scale gold mining (ASGM) sites with large influxes of miners from different regions has not been properly evaluated, owing to the closed nature of the ASGM sector. Here, we use remote sensing imagery and field investigations to assess ASGM sites with large influxes of miners living in mining camps in Bone Bolango Regency, Gorontalo Province, Indonesia, in 1995–2020. Built-up areas were identified as indicators of transformation of camp-type ASGM sites, using the Normalized Difference Vegetation Index, from the time series of images obtained using Google Earth Engine, then correlated with the prevalent gold market price. An 18.6-fold increase in built-up areas in mining camps was observed in 2020 compared with 1995, which correlated with increases in local gold prices. Field investigations showed that miner influx also increased after increases in gold prices. These findings extend our understanding of the rate and scale of development in the closed ASGM sector and the driving factors behind these changes. Our results provide significant insight into the potential rates and levels of socio-environmental pollution at local and community levels.

DOI： 10.3390/ijerph18189441

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担当区分：最終著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.37358/rc.20.12.8385

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Taylar＆Francis  

DOI： 10.1080/02772248.2020.1839074

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.1088/1755-1315/589/1/012013

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その他リンク： https://iopscience.iop.org/article/10.1088/1755-1315/589/1/012013

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.1088/1755-1315/589/1/012019

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その他リンク： https://iopscience.iop.org/article/10.1088/1755-1315/589/1/012019

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.1088/1755-1315/589/1/012015

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その他リンク： https://iopscience.iop.org/article/10.1088/1755-1315/589/1/012015

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.1088/1755-1315/589/1/012020

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その他リンク： https://iopscience.iop.org/article/10.1088/1755-1315/589/1/012020

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.1088/1755-1315/589/1/012007

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その他リンク： https://iopscience.iop.org/article/10.1088/1755-1315/589/1/012007

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.3390/su12229598

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担当区分：最終著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：MDPI AG  

DOI： 10.3390/ijerph17186757

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.3390/cosmetics7030058

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.1088/1755-1315/536/1/012004

Scopus

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その他リンク： https://iopscience.iop.org/article/10.1088/1755-1315/536/1/012004

掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.1088/1755-1315/536/1/012003

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その他リンク： https://iopscience.iop.org/article/10.1088/1755-1315/536/1/012003

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.1088/1755-1315/536/1/012009

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その他リンク： https://iopscience.iop.org/article/10.1088/1755-1315/536/1/012009

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.1088/1755-1315/536/1/012007

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その他リンク： https://iopscience.iop.org/article/10.1088/1755-1315/536/1/012007

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.1088/1755-1315/536/1/012008

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その他リンク： https://iopscience.iop.org/article/10.1088/1755-1315/536/1/012008

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.1088/1755-1315/536/1/012005

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その他リンク： https://iopscience.iop.org/article/10.1088/1755-1315/536/1/012005

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1088/1755-1315/536/1/012006

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その他リンク： https://iopscience.iop.org/article/10.1088/1755-1315/536/1/012006

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.3390/toxics8010015

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：MDPI AG  

Silicon (Si) has been recently reconsidered as a beneficial element due to its direct roles in stimulating the growth of many plant species and alleviating metal toxicity. This study aimed at validating the potential of an aquatic macrophyte Eleocharis acicularis for simultaneous removal of heavy metals from aqueous solutions under different dissolved Si. The laboratory experiments designed for determining the removal efficiencies of heavy metals were conducted in the absence or presence of Si on a time scale up to 21 days. Eleocharis acicularis was transplanted into the solutions containing 0.5 mg L−1 of indium (In), gallium (Ga), silver (Ag), thallium (Tl), copper (Cu), zinc (Zn), cadmium (Cd), and lead (Pb) with various Si concentrations from 0 to 4.0 mg L−1. The results revealed that the increase of dissolved Si concentrations enhanced removal efficiencies of E. acicularis for Ga, Cu, Zn, Cd, and Pb, while this increase did not show a clear effect for In, Tl, and Ag. Our study presented a notable example of combining E. acicularis with dissolved Si for more efficient removals of Cu, Zn, Cd, Pb, and Ga from aqueous solutions. The findings are applicable to develop phytoremediation or phytomining strategy for contaminated environment.

DOI： 10.3390/w11050940

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.3390/ijerph15112480

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Multidisciplinary Digital Publishing Institute  

DOI： 10.3390/w10111507

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：MDPI AG  

We report the atmospheric Hg contamination in an artisanal and small-scale gold mining (ASGM) area in North Gorontalo, Indonesia. It is well known that atmospheric Hg contaminates the air, water, soil, and living organisms, including trees. In this study, we calculated total weight of heavy metals, especially Hg, and quantitatively measure the concentrations of heavy metals, especially Hg, in tree bark from an ASGMarea. Tree bark can be used for the environmental assessment of atmospheric contamination because it attaches and absorbs heavy metals. Atmospheric Hg and other heavy metals, including Fe and Mn, and As were detected on the tree bark samples. The total weight of Hg, As, Fe, andMn in the tree bark samples ranged fromundetectable (ND) to 9.77,NDto 81.3, 124-4028, 37.0-1376 _g dry weight (DW), respectively per weight of sample. Based on quantitatively analysis micro-PIXE, the highest concentrations of all thesemetals were detected in the outer part of the bark. We conclude that tree bark can adsorb atmospheric contamination, which is then absorbed into the inner tissues.

DOI： 10.3390/geosciences8010031

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：MDPI AG  

The industrial mining sector is one of the main contributors to environmental damage and toxic metal pollution, although some contamination originates from natural geological sources. Due to their position at the top of the food chain, cattle tend to bioaccumulate mercury (Hg) in their bodies. We used analyses of cattle hair samples to investigate Hg contamination in cattle farmed within and outside of an artisanal and small-scale gold-mining area in Bombana, Southeast Sulawesi, Indonesia. We also examined the factors that might have influenced the toxicity, such as the environmental conditions, sex, and age of the cattle. A total of 63 hair samples were analyzed by particle-induced X-ray emission spectrometry. The mean Hg concentration was significantly higher in hair from cattle farmed within the artisanal and small-scale gold mining area (11.44 µg/g hair) than in those farmed outside the area (2.89 µg/g hair, p &lt
0.05). A possible cause of this is contamination by mercury persistent in terrestrial food chain. The results indicates that the level of toxic metals such as Hg need to be controlled in food sources to protect human health, especially in Bombana, Indonesia.

DOI： 10.3390/geosciences7040133

Scopus

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記述言語：英語  

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記述言語：英語  

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記述言語：英語  

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：MDPI AG  

Urban artisanal gold mining (UAGM) in Makassar, South Sulawesi, Indonesia, has been run by a number of urban gold workers with gold jewelry manufacture as its core activity. The wastes generated from goldsmiths’ activities were further processed by the gold smelters to recover fine gold particles. Smelting gold doré, amalgamation, and burning out the amalgam were the mercury-based gold process usually applied in their work. While working the gold workers are, therefore, potentially exposed to a source of mercury pollution that may cause health problems because of working without proper protection. The aims of this research are to characterize the process of urban artisanal gold mining with the potential mercury exposures during the process, and to assess the health of the gold workers. The results showed that the gold workers had a low educational background, but a relatively high income. The total mercury concentration of gold workers was higher than the control group. They were exposed to intoxicatingly high levels of mercury with the average total mercury concentrations of 6.6 and 10.8 _g/g in the hair of indirect and direct exposed workers, respectively. The health assessment showed that 85% of the gold workers suffered neurological symptoms, such as tremors, and 44%–56% of them experienced restricted fields of vision, slow reflexes, sensory disturbances, unbalanced rigidity, and ataxia. The results also showed that the working years have reasonable correlation with the sum of the positive findings in the 10 neurological symptoms.

DOI： 10.3390/geosciences7030044

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記述言語：日本語   掲載種別：研究論文（学術雑誌）  

添付ファイル： インドネシア国ゴロンタロ州における「海外フィールドワーク実習」パイロットプログラムの実施報告.pdf

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Institute of Physics Publishing  

Many petrological studies of volcanic rocks have attempted to better predict future volcanic activity. In this study, we examined volcanic ash samples from Showa Crater in Sakurajima, Japan, which were erupted from January to October 2013. This study was used two types of juvenile material
black vesicular volcanic rock (BVVR) and black non-vesicular volcanic rock (BNVVR) to determine the variable of magmatic processes in the magma conduit during the 2013 eruption. We divided the duration into three periods such as January to April, April to July, and July to October based on the variable tendency of SiO2 contents and volume abundance of the interstitial glasses in BVVR and BNVVR. The estimated melt compositions demonstrate that the variability of SiO2 contents and volume abundance of microcrystal in the groundmass (BVVR and BNVVR) over time were caused by micro-crystallization processes. The estimated of water contents and vesicle volume shows the influence of degassing process in the rock forming. Also, the correlation of petrological features with the number of eruptions and eruptive volumes, exhibit the variable of magma supply into conduit in each period. Consequently, careful monitoring of the petrological features of erupted materials may provide useful constraints on future eruptive activity and thereby assist in the mitigation of volcanic hazards.

DOI： 10.1088/1755-1315/71/1/012008

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Institute of Physics Publishing  

Phytoremediation using aquatic plants is a sustainable, low-cost measure for remediating water contaminated by toxic heavy metals. In this study, we conducted a channel experiment using Eleocharis acicularis in heavy metal-contaminated mildly alkaline wastewater under unfavorable plant habitat conditions in winter in northeastern Japan. The wastewater from an embankment consisting of Neogene marine sediments had a temperature of 10-15 °C and a pH of about 9, and it contained ∼0.02 mg/L of As and ∼ 0.23 mg/L of Mo. About 16 kg (fresh weight) of E. acicularis was laid in a plastic channel measuring 30 cm in width by 20 m in length, and the channel was enclosed in a tunnel greenhouse. The experiment was conducted for the 3 months from November 2015 at an average flow rate of 0.3 L/min and an air temperature of -4 to 19 °C. No reductions in As or Mo concentrations in the outflow were detected. However, at 3 months, the E. acicularis showed accumulations of ∼7 mg/kg As and ∼18 mg/kg Mo as dry weight, indicating that this remediation method is workable in an unfavorable low-temperature, mildly alkaline environment.

DOI： 10.1088/1755-1315/71/1/012018

Scopus

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Institute of Physics Publishing  

Kapok (Ceiba pentandra, family Bombacaceae) fiber (KF) is a by-product of traditional agriculture in tropical countries and is mainly used as fiberfill in fabric. The aim of this study was to explore the possibility of using KF to remove clay particles from turbid water. Firstly, KF was boiled at 100 °C in deionized water for 15 min to remove the surface oil. A suspension of montmorillonite powder mixed 1 L of deionized water, divided into volumes of 100, 200, 300, and 400 mL, was used as the turbid water source. The ability of KF to remove clay particles from the water was assessed by filtering the water through 60 g of treated KF in a ∼397.9 cm3 acrylic column. Results showed that the treated KF effectively removed the clay particles from the entire volume of turbid water in this experiment
the results also demonstrate that this KF fiber has value as a simple and inexpensive tool for water treatment, especially in developing countries.

DOI： 10.1088/1755-1315/71/1/012017

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Institute of Physics Publishing  

The traditional gold smelting in Makassar, South Sulawesi, Indonesia, is an informal work with the manufacture of gold jewelry as the core activity. Stages of the gold processing include panning, smelting, and refining with mercury. In the current study, we used a social demography analysis to classify the traditional gold smelter workers in this region. Data (e.g. sex, age, education level, time working, and income) were obtained from a questionnaire survey of 58 smelter workers in the Wajo and Tallo Sub-districts of Makassar. Results showed that 84.5% of the workers were males aged from 21 to 50 years with on the average 15 year of work. The gold smelter were last educated in elementary school (31.0%), junior high school (36.2%), and senior high school (27.6%) levels whereas 5.1% have no education. We found that the monthly income of an un-skilled worker was ∼Rp. 2 million (USD 147.0) whereas that of a skilled worker was between Rp. 2.5 million (USD 183.76) and Rp. 5 million (USD 367.51). An owner could earn over Rp. 5 million (USD 367.51) per month. The result suggested that the traditional gold smelting used rudimentary technique and attracted young people with a low education level. This business continues to exist because the worker earn sufficient income and may higher through mastering gold smelter proficiency.

DOI： 10.1088/1755-1315/71/1/012027

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Institute of Physics Publishing  

There is a consensus that the artisanal small-scale gold mining (ASGM) sector contributes to trapping individuals in a cycle of poverty and financial insecurity with a low standard of living. The purpose of this study was to analyze the economic circumstances of miners in the Bombana ASGM area in Indonesia using a mixed methodology approach that involved collecting, analyzing, and mixing both quantitative and qualitative data in a single study. Results show that the average and maximum monthly incomes of 201 miner households were Rp. 4,360,000 and Rp. 9,750,000, respectively. The average income in the ASGM area in Bombana was higher than that at similar sites on Java Island (∼Rp. 2,900,000) and was much higher than the average monthly income of the inhabitants of Bombana (∼Rp. 2,100,000). Because of the higher revenue generated in the ASGM sector, miners and their families depend long-term on the mining work, which makes it difficult to control the mining activity and the associated environmental degradation.

DOI： 10.1088/1755-1315/71/1/012016

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Institute of Physics Publishing  

As a solution to economic poverty, we investigated the possibility of developing pearl farming in Kabupaten Gorontalo Utara region of Indonesia. The approximate income of farmers is 15 - 28 million rupiah/year, and that of fishers is 51 million rupiah/year. As these incomes are low and unreliable, it is important that food processing and other industries are developed and that agriculture and fisheries are promoted. Pearl farming minimize environmental load. The coastal environmental conditions are good for pearl shell growth. From 2001 till 2013, pearl farming was undertaken by a Japanese company in Kabupaten Gorontalo Utara, but the operation caused because of conflict with local people and issues with the actions of manager. To establish successful pearl farming businesses it is more important to address social issues than environmental factors.

DOI： 10.1088/1755-1315/71/1/012019

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Institute of Physics Publishing  

Mine dumps pose environmental problems worldwide. Phytoremediation is a remediation technique that uses plants to clean polluted environments. Athyrium yokoscence, a fern of the family Aspidiaceae, is a well-known Cd hyperaccumulator used in phytoremediation. The aim of the current study is to determine the extent of heavy metal absorption by A. yokoscence and evaluate its potential use in phytoremediation. The shoots, stems, and roots of A. yokoscence were analysed by inductively coupled plasma-optical emission spectrometry (ICP-OES) to determine the concentrations of Cd, As, Pb, Cu, and Zn, yielding maximum concentrations in the shoots of 851, 215, 192, 60.9, and 769 mg/kg-DW, in the stems of 481, 140, 881, 28.9, and 495 mg/kg-DW, and in the roots of 1210, 1868, 6473, 2484, and 5446 mg/kg-DW, respectively. The results indicate that A. yokoscence is a hyperaccumulator of Cd and can be used for the translocation of As, Pb, Cu, and Zn within the shoot tissue. The roots translocate heavy metals through the stems and they finally reside within the shoot tissue. The results suggest that A. yokoscence has considerable potential use as an environmental assessment tool for Cd, As, Pb, Cu, and Zn, and in helping to remediate mine dumps.

DOI： 10.1088/1755-1315/71/1/012025

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Institute of Physics Publishing  

We performed the Particle Induced X-ray Emission (PIXE) analysis on scalp hair samples of 115 ASGM miners and inhabitants of Gorontalo Utara regency. Along with mercury (Hg), we presented other trace elements such as Copper (Cu) and Manganese (Mn). Concentrations of Cu, Mn and Hg in the scalp hairs of ASGM miners are higher non miners. Significant and positive correlations coefficients between Cu and Hg concentration with Mn concentration may indicate that there are still unknown metabolism process related with ASGM activities.

DOI： 10.1088/1755-1315/71/1/012028

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DOI： 10.3390/environments4020040

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記述言語：英語   出版者・発行元：Springer  

DOI： 10.1007/s40831-017-0130-8

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記述言語：日本語  

添付ファイル： 人工水路を用いた植物によるヒ素を含む水の浄化技術2017.pdf

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：MDPI AG  

The rapid expansion of the artisanal and small-scale gold mining (ASGM) industry in developing countries has marginalized the local communities in poverty, and resulted in occupational exposure to mercury via the gold extraction process. We investigated the mercury exposure of the mining workers lived inside and outside the mining area. Based on the occupations of the contributors, the hair samples were divided into three subgroups: directly exposed, indirectly exposed, and a control. A total of 81 hair samples were analyzed by particle-induced X-ray emission spectrometry. The median mercury concentration was highest in the hair from the directly exposed group (12.82 μg/g hair) (control group median: 4.8 μg/g hair, p &lt
0.05), and the concentrations in hair from 45 respondents exceeded the Human Biomonitoring I (HBM I) threshold limit. Mercury concentrations were also elevated in the hair from the indirectly exposed group (median 7.64 μg/g hair, p &lt
0.05), and concentrations in hair from 24 respondents exceeded the HBM I threshold limits. Exposure to mercury during ASGM presents health risks and is harmful for the miners
mercury is also at hazardous levels for people who live in the mining area but who are not engaged in mercury-based gold extraction.

DOI： 10.3390/toxics5010007

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記述言語：英語   出版者・発行元：Trade Science  

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添付ファイル： 「課題解決思考力を育む海外準正課プログラム」構築に向けた実践報告]2017.pdf

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担当区分：筆頭著者  

添付ファイル： P25-P32 インドネシア国ゴロンタロ州における「海外インターンシップ実習」パイロットプログラムの実施報告.pdf

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記述言語：英語  

DOI： 10.3390/environments3040035

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担当区分：最終著者   記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：日本土木学会  

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掲載種別：研究論文（国際会議プロシーディングス）  

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記述言語：英語   出版者・発行元：MDPI  

DOI： 10.3390/environments3030015

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出版者・発行元：日本アイソトープ協会仁科記念サイクロトロンセンター  

添付ファイル： NMCC共同利用研究成果報文集22（2015）岡田弘.pdf

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

© 2016 by the authors; licensee MDPI, Basel, Switzerland.Sakurajima in Japan is one of the world’s most active volcanoes. This paper presents the results of a petrological study of the Showa Crater volcanic ash samples ejected from January 2011 to November 2012 from Sakurajima. The aim of this paper is to reconstruct the evolution in time of the conduit magma system, based on the compositions and physical properties of the studied volcanic ash. We analyzed the composition of interstitial glass and microcrystal of Black Volcanic Rock (BVR) and Black Vesicular Volcanic Rock (BVVR) in order to estimate the magma ascent rate. The results show that SiO2 content of interstitial glass and crystallinity of the BVR is generally higher than for BVVR. The different types of juvenile material likely resulted from cooling-induced crystallization and decompression-induced crystallization in the conduit. The conditions of magma transit within the conduit from 2011 to 2012 differ: in 2011, the decompression rate and magma ascent rate of BVR were higher than for BVVR, but, in 2012, the decompression rate and magma ascent rate between BVR and BVVR were similar. As such, monitoring the petrological features of dated eruptive materials could provide useful information for evaluating ongoing eruptive activity.

DOI： 10.3390/geosciences6010012

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.17014/ijog.3.2.139-147

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：AMER INST PHYSICS  

Environmental contamination is one of the most important factors responsible for degradation of the surface environment on the earth. Heavy metals play a dominant role in this degradation. Phytoremediation is an environmental remediation technique that takes advantage of plant physiology and metabolism. The purpose of this paper is to review the previous papers on the phytoremediation experiments of Eleocharis acicularis. The E. acicularis is easily cultivated and controlled in environments with abundant water, hyperaccumulates Cu, Zn, As, Pb, Cd, Cs and Hg; showing great potential for use in the phytoremediation of water environments contaminated by the heavy metals. The E. acicularis shows great potential for use in the phytoremediation of water environments contaminated by heavy metals including radiogenic elements. The present results also indicate that phytoremediation by the E. acicularis is likely to be widely applicable to tropical areas of Southeast Asia.

DOI： 10.1063/1.4953512

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記述言語：日本語   出版者・発行元：土木研究所寒地土木研究所  

CiNii Books

J-GLOBAL

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記述言語：英語   出版者・発行元：Japan Association for Quaternary Research  

The Shoubu volcanic ash is intercalated with the middle Pleistocene Iyoki Formation, western Shikoku, Japan. The ash has been petrographically correlated with several widespread tephras, but detailed geochemical correlations have yet to be made. We therefore examine the lithology, petrography, glass geochemistry, and fission-track (FT) ages of the Shoubu ash in an attempt to establish robust, detailed correlations. The petrography and chemical composition of glass show vertical trends in the Shoubu ash. The FT age of the lowest unit indicates that eruptions began at 0.53±0.12Ma. Although the Shoubu ash has previously been interpreted as a single, homogeneous volcanic ash, the results indicate that it either comprises several volcanic ashes or records a compositional change within a single eruptive sequence.

DOI： 10.4116/jaqua.54.359

CiNii Books

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その他リンク： https://jlc.jst.go.jp/DN/JLC/20018999646?from=CiNii

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：MDPI AG  

The lichen, Stereocaulon exutum Nylander, occurring in a contaminated abandoned mine site was investigated to clarify (1) the behavior of heavy metals and As during the slag weathering processes mediated by the lichen; and (2) the distribution of these elements in the lichen thallus on slag. The heavy metals and As in the slag are dissolved from their original phases during the weathering process by lichen substances (organic acids) and hypha penetration, in addition to non-biological weathering. The dissolved elements are absorbed into the lichen thallus. Some of these dissolved elements are distributed in the cells of the hyphae. The others are distributed on the surface of the hyphae as formless particles and show lateral distribution inside the cortex of the thallus. The Cu and Zn concentrations in the thalli are positively correlated with the concentrations in the corresponding substrata and a positive intercept in the regression curve obtained using a linear function. These chemical characteristics make this lichen a good biomarker for Cu and Zn contamination of the substrata of the lichen. Therefore, the present study supposes that Stereocaulonexutum has a possible practical application in biomonitoring or risk assessment of heavy metal pollution at abandoned mine sites.

DOI： 10.3390/met5031591

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記述言語：日本語   出版者・発行元：日本地衣学会  

J-GLOBAL

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：MDPI AG  

Mercury concentrations in the environment (river sediments and fish) and in the hair of artisanal gold miners and inhabitants of the Gorontalo Utara Regency were determined in order to understand the status of contamination, sources and their impacts on human health. Mercury concentrations in the sediments along the Wubudu and Anggrek rivers are already above the tolerable level declared safe by the World Health Organization (WHO). Meanwhile, commonly consumed fish, such as snapper, have mercury levels above the threshold limit (0.5 μg/g). The mean mercury concentrations in the hair of a group of inhabitants from Anggrek and Sumalata are higher than those in hair from control group (the inhabitants of Monano, Tolinggula and Kwandang). The mean mercury concentration in the hair of female inhabitants is higher than that in the hair of male inhabitants in each group. Neurological examinations were performed on 44 participants of artisanal and small-scale gold mining (ASGM) miners and inhabitants of Anggrek and Sumalata. From the 12 investigated symptoms, four common symptoms were already observed among the participants, namely, bluish gums, Babinski reflex, labial reflex and tremor.

DOI： 10.3390/geosciences5020160

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.18502/kls.v2i1.209

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記述言語：日本語  

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：OPTICAL SOC AMER  

Red fluorescence lamellae in prismatic layers of Pinctada vulgaris shell were investigated. SEM-EDS, XRD, and TG-DTA were utilized to characterize prismatic layers. We found that prismatic layers are calcitic prismatic (CP) layers with rich organic substances. Excitation spectrum for red fluorescence determined by a spectrophotometer indicates that the fluorescent matter in the organic substances is porphyrin compound derivatives. By using a fluorescence microspectroscope, the cross section of CP layers shows red fluorescence forming lamellar pattern. The lamellar pattern consists of red and black parallel zones with a modulation of emission intensity. Elemental mapping show a correlation of the fluorescence intensity decay with sulphur-rich zones occupying the CP layers in the black zones. (C)2014 Optical Society of America

DOI： 10.1364/OME.4.001813

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：PERGAMON-ELSEVIER SCIENCE LTD  

The past two decades have seen the reporting of microbial fossils within ancient oceanic basalts that could be identical to microbes within modern basalts. Here, we present new petrographic, mineralogical, and stable isotopic data for metabasalts containing filamentous structures in a Jurassic accretionary complex within the northern Chichibu Belt of the Yanadani area of central Shikoku, Japan. Mineralized filaments within these rocks are present in interstitial domains filled with calcite, pumpellyite, or quartz, and consist of iron oxide, phengite, and pumpellyite. delta C-13(PDB) values for filament-bearing calcite within these metabasalts vary from -2.49 parts per thousand to 0.67 parts per thousand. A biogenic origin for these filamentous structures is indicated by (1) the geological context of the Yanadani metabasalt, (2) the morphology of the filaments, (3) the carbon isotope composition of carbonates that host the filaments, and (4) the timing of formation of these filaments relative to the timing of low-grade metamorphism in a subduction zone. The putative microorganisms that formed these filaments thrived between eruption (Late Paleozoic) and accretion (Early Jurassic) of the basalt. The data presented here indicate that cryptoendolithic life was present within water-filled vesicles in pre-Jurassic intraplate basalts. The mineralogy of the filaments reflects the low-grade metamorphic recrystallization of authigenic microbial clays similar to those formed by the encrustation of prokaryotes in modern iron-rich environments. These findings suggest that a previously unusual niche for life is present within intraplate volcanic rocks in accretionary complexes. (C) 2013 Elsevier Ltd. All rights reserved.

DOI： 10.1016/j.pss.2013.05.008

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：PERGAMON-ELSEVIER SCIENCE LTD  

Microbial trace fossils on terrestrial basalts can be used as an analogue in the search for traces of life on other terrestrial planets. This study reports on microbial trace fossils within Permian greenstones in the Maizuru Terrane, southwest Japan, which is recognized as back-arc basin oceanic crust that consists mainly of metabasalt and metagabbro. The trace fossils have been studied by means of morphology, mineralogy, elemental mapping, and carbon isotope analysis. Although minute original textures of trace fossils are recrystallized in these rocks, Granulohyalichnus vulgaris isp., Tubulohyalichnus spiralis isp., and Tubulohyalichnus annularis isp. were identified. Significant concentration of C within the trace fossils implies these are organic remnants from microbes. The delta C-13(PDB) values < -7 parts per thousand of calcite within the greenstones indicates that the bacterial activity took place prior to the formation of calcite veins. The results support that microbial trace fossils within low-grade metamorphic basalt can be reliably identified based on their morphology and chemical composition, as reveled by elemental mapping. In this context, glassy Martian basalt may be the best rock type to investigate in terms of searching for signs of microbial activity on Earth and other planets. (C) 2013 Elsevier Ltd. All rights reserved.

DOI： 10.1016/j.pss.2013.09.018

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記述言語：日本語   出版者・発行元：環境放射能除染学会  

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：PERGAMON-ELSEVIER SCIENCE LTD  

Understanding the primary relationships between basaltic rocks and fossiliferous sedimentary rocks provides direct information on the timing and geologic setting of past oceanic igneous activity. Though the basalts associate with cherts in the Northern Chichibu Belt have been petrographically identified as OIA/OIT or MORB, such primary relationships of them are not well understood.
This paper provides the primary intrusive relation of basaltic rocks contact with chert and calcareous siliceous shale of Sugyo area in the Northern Chichibu Belt on Shikoku Island. The sediments are included within the basalt as xenoliths and in the contact zone with the basalt they have been recrystallized and contain metamorphic minerals possibly produced by contact metamorphism due to the basalt intrusion. These indicate that the basalts are sills or dykes that have intruded the sediments. The cherts are radiolarian chert which alternate with the calcareous siliceous shale and include minerals of oceanic volcanic origins. Asselian radiolarian fossils are yielded from a subangular chert xenolith that was intruded by the basalt possibly before the chert had undergone complete diagenesis. The petrography of the sills indicates they are alkali basalts. X-ray fluorescence analyses indicate that the basaltic rocks include subalkaline basalts and oceanic island tholeiite or oceanic island alkaline basalts.
We have concluded that the basaltic dykes and sills were products of Asselian or younger intra-plate volcanism at an oceanic area covered by a pile of pelagic siliceous sediments. These Asselian cherts are earlier than the Sakmarian, Wordian and Capitanian limestones that overlie intra-plate basalts of Ohnogahara part of the Northern Chichibu Belt. The basalt sills may therefore represent the early stages of intra-plate igneous activity in the paleo-Pacific Ocean. (C) 2013 Elsevier Ltd. All rights reserved.

DOI： 10.1016/j.jseaes.2013.09.016

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出版者・発行元：一般社団法人 日本地質学会  

DOI： 10.14863/geosocabst.2014.0_535

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：MDPI AG  

Artisanal metallurgical slag produced more than 50 years ago at a mine site in southwest Japan is rich in toxic metals and metalloids. Some of the slag remains on a waste dump and could contaminate the surrounding area through the dissolution of heavy metals and metalloids during weathering. To assess this risk, this study has investigated the behavior of the toxic elements in the smelting slag during weathering. Most of the potentially toxic elements are contained in willemite and/or matte drops. Maximum metal and metalloid concentrations in the slag are 28.1 wt % Fe, 22.7 wt % Zn, 1.63 wt % Cu, 3450 mg/kg Sn, 826 mg/kg Pb, 780 mg/kg As, and 116 mg/kg Cd. Zn is mainly contained in willemite, whereas other metals and metalloids are mainly concentrated in matte drops. The willemite and matte drops are converted to Fe-hydroxides during weathering, indicating that potentially toxic metals and metalloids contained in these phases are released by weathering processes. Therefore, weathering of the artisanal metallurgical slag, containing large amounts of willemite and matte drops, may pollute the surrounding environment.

DOI： 10.3390/min3040412

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記述言語：日本語   出版者・発行元：地質汚染− 医療地質− 社会地質学会  

J-GLOBAL

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記述言語：日本語   出版者・発行元：株式会社産業と環境  

CiNii Books

J-GLOBAL

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：SPRINGER  

Pyrite framboid in sedimentary rocks could be concerned with arsenic contamination in groundwater of acidic environment and has been studied for the formation process of its unique morphology. However, not much has been discussed about the formation process based on the heavy-metal distribution in pyrite framboids and their aggregates. To reveal the formation process of pyrite framboids and their aggregates, mudstone from the Late Cretaceous Hakobuchi Group, central Hokkaido, Japan, are investigated for mode, petrographical, mineralogical, and micro-PIXE (particle-induced X-ray emission) analysis in this study. Spherical and sub-spherical pyrite framboids observed in polyframboids can be divided into two types based on the diameter of framboids (D) and the average diameter of microcrystals (d) within framboids: type 1, ranging from 2 to 9 mu m and from 0.4 to 0.9 mu m, respectively, and type 2, ranging from 8 to 50 mu m and from 0.5 to 1.8 mu m, respectively. Based on the quantitative traverse analyses and 2-D elemental mapping results by micro-PIXE, heterogeneities in the concentrations of heavy metals within the analyzed aggregations of pyrite are exhibited. On the basis of the As and Pb zoning patterns, the time range and chronological stages of pyrite-aggregation growth are revealed.

DOI： 10.1007/s12665-012-1966-7

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記述言語：日本語   掲載種別：研究論文（研究会，シンポジウム資料等）   出版者・発行元：[地盤工学会]  

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記述言語：日本語  

J-GLOBAL

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記述言語：日本語   出版者・発行元：地質汚染− 医療地質− 社会地質学会  

J-GLOBAL

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記述言語：日本語   出版者・発行元：地質汚染− 医療地質− 社会地質学会  

J-GLOBAL

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出版者・発行元：一般社団法人 日本地質学会  

DOI： 10.14863/geosocabst.2012.0_310

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：WILEY-BLACKWELL  

Phytoremediation is an environmental remediation technique that takes advantage of plant physiology and metabolism. The unique property of heavy metal hyperaccumulation by the macrophyte Eleocharis acicularis is of great significance in the phytoremediation of water and sediments contaminated by heavy metals at mine sites. In this study, a field cultivation experiment was performed to examine the applicability of E. acicularis to the remediation of water contaminated by heavy metals. The highest concentrations of heavy metals in the shoots of E. acicularis were 20 200 mg Cu/kg, 14 200 mg Zn/kg, 1740 mg As/kg, 894 mg Pb/kg, and 239 mg Cd/kg. The concentrations of Cu, Zn, As, Cd, and Pb in the shoots correlate with their concentrations in the soil in a log-linear fashion. The bioconcentration factor for these elements decreases log-linearly with increasing concentration in the soil. The results indicate the ability of E. acicularis to hyperaccumulate Cu, Zn, As, and Cd under natural conditions, making it a good candidate species for the phytoremediation of water contaminated by heavy metals.

DOI： 10.1002/clen.201000488

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELSEVIER SCI LTD  

Eleocharis acicularis was exposed to different concentrations of In, Ag, Pb, Cu, Cd, and Zn in the laboratory to assess its capability in accumulating these metals. After 15 days, 477 mg/kg dry wt. of In was accumulated by the roots; concentrations of Ag, Pb, Cu, Cd, and Zn in the shoots were 326, 1120, 575, 195, and 213 mg/kg dry wt., respectively. The results indicate that E. acicularis has the ability to accumulate these metals from water, making it a good candidate species for phytoremediation and phytomining. (C) 2010 Elsevier Ltd. All rights reserved.

DOI： 10.1016/j.biortech.2010.10.014

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PubMed

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELSEVIER SCIENCE BV  

This study was conducted to evaluate the phytoremediation and phytomining potential of 10 plant species growing naturally at one of the largest lead-zinc mines in Northern Vietnam. Total concentrations of heavy metals and arsenic were determined in the plant and in associated soil and water in and outside of the mine area. The results indicate that hyperaccumulation levels (mg kg(-1) dry weight) were obtained in Houttuynia cordata Thunb. (1140) and Pteris vittata L (3750) for arsenic, and in Ageratum houstonianum Mill. (1130), Potamogeton oxyphyllus Miq. (4210), and P. vittata (1020) for lead. To the best of our knowledge, the present paper is the first report on metal accumulation and hyperaccumulation by H. cordata, A. houstonianum, and P. oxyphyllus. Based on the obtained concentrations of metals, bioconcentration and translocation factors, as well as the biomass of these plants, the two latter species and P. vittata are good candidates for phytoremediation of sites contaminated with arsenic and multi-metals. None of the collected plants was suitable for phytomining, given their low concentrations of useful metals (e.g., silver, gallium, and indium). (C) 2010 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.jhazmat.2010.12.020

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記述言語：日本語   出版者・発行元：一般社団法人 日本地質学会  

DOI： 10.14863/geosocabst.2011.0.271.0

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記述言語：日本語  

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：社会地質学会  

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記述言語：日本語   出版者・発行元：愛媛大学理学部紀要委員会  

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記述言語：日本語   出版者・発行元：愛媛大学理学部紀要委員会  

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記述言語：日本語   出版者・発行元：特定非営利活動法人日本火山学会  

The Hirano volcanic ash in Nomura Town, southwestern Shikoku, Japan, has been characterized by petrography, refractive index and geochemical composition of volcanic glass (major and trace elements), and fission-track age of zircon. The Hirano volcanic ash has abundant vesicular glass shards and phenocrysts of biotite, hornblende and orthopyroxene. The volcanic glass has a rhyolitic composition. LREE (Light Rare Earth Element) profiles of the volcanic glass are steep with La/Sm_N=5.0-5.3 and those of HREE (Heavy Rare Earth Element) are flat with Gd/Yb_N=1.2-1.3. They have a weakly developed Eu anomaly. The Hirano volcanic ash has similar values of some incompatible trace element ratios, such as La/Y, Ba/La and Nb/Zr, with the Yufugawa pyroclastic flow deposit in the Ooita Prefecture. The fission-track age of 0.46±0.09Ma (1σ) was obtained for zircons from the Hirano volcanic ash. The Hirano volcanic ash can be correlated to the Yufugawa pyroclastic flow deposit based on petrographical, geochemical and geochronological data.

DOI： 10.18940/kazan.54.6_241

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記述言語：日本語   出版者・発行元：地質汚染ー医療地質ー社会地質学会  

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記述言語：英語   掲載種別：研究論文（研究会，シンポジウム資料等）   出版者・発行元：社会地質学会  

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：WILEY-V C H VERLAG GMBH  

Sb, As, Cu, and Zn toxicity and contamination have become a growing concern in recent years. Phytoremediation, a plant based and cost effective technology, may be an effective approach in the cleanup of water contaminated by these metals. In this study, the aquatic macrophyte Eleocharis acicularis was used in laboratory and field experiments to assess its capability to accumulate Sb, As, Cu, and Zn, and thereby investigate its potential application in phytoremediation. The results showed that E. acicularis adapted well to water contaminated by these metals. The removal rates of Sb, As, Cu, and Zn in the laboratory experiment were 3.04, 2.75, 0.417, and 1.49 mu g/L/day, respectively. The highest concentrations of these metals accumulated in E. acicularis after 10 days of the laboratory experiment were 6.29, 6.44, 20.5, and 73.5 mg/kg dry weight, respectively. Only 8% of As, 12% of Sb, 87% of Cu and 93% of Zn removed from the water were used by E. acicularis. The highest concentrations of Sb, As, Cu, and Zn accumulated in E. acicularis after 10 wk of the field experiment were 76.0, 22.4, 33.9, and 266 mg/kg dry weight, respectively. The results indicate that E. acicularis has the ability to accumulate Sb, As, Cu, and Zn from contaminated water.

DOI： 10.1002/clen.200900061

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出版者・発行元：地質汚染ー医療地質ー社会地質学会  

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記述言語：日本語   出版者・発行元：愛媛大学理学部紀要委員会  

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記述言語：日本語   出版者・発行元：愛媛大学理学部紀要委員会  

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記述言語：日本語   出版者・発行元：愛媛大学理学部紀要委員会  

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：WILEY-V C H VERLAG GMBH  

Phytoremediation, a plant-based and cost-effective technology for the cleanup of contaminated soil and water, is receiving increasing attention. In this study, the aquatic macrophyte Eleocharis acicularis was examined for its ability to take up multiple heavy metals and its potential application for phytoremediation at an abandoned mining area in Hokkaido, Japan. Elemental concentrations were measured in samples of F. acicularis, water, and soil collected from areas of mine tailing and drainage. The results reveal that Pb, Fe, Cr, Cu, Ni, and Mn accumulation in the plants increased over the course of the experiment, exceeding their initial concentrations by factors of 930, 430, 60, 25, 10, and 6, respectively. The highest concentrations of Fe, Pb, Zn, Ni, Cr, Cu, and Ni within the plants were 59500, 1120, 964, 388, 265, 235, and 47.4 mg/kg dry wt., respectively, for plants growing in mine drainage after 11 months of the experiment. These results indicate that E. acicularis is a hyperaccumulator of Pb. We also found high Si concentrations in E. acicularis (2.08%). It is likely that heavy metals exist in opal-A within cells of the plant. The bioconcentration factors (BCF; ratio of metal concentration in the plant shoots to that in the soil) obtained for Cr, Cu, Zn, Ni, Mn, and Pb were 3.27, 1.65, 1.29, 1.26, 1.11, and 0.82, respectively. The existence of heavy metals as sulphides is thought to have restricted the metal-uptake efficiency of E. acicularis at the mine site. The results of this study indicate that E. acicularis shows great potential in the phytoremediation of mine tailing and drainage rich in heavy metals.

DOI： 10.1002/clen.200900009

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記述言語：日本語   出版者・発行元：日本地質学会  

愛媛県久万高原町地芳地域における北部秩父帯は,構成岩石および地質構造に基づいて,北から泥質混在岩からなるユニットI,砂質泥質準片岩を主体とするユニットII,緑色岩-石灰岩体を主体とし,泥質混在岩および陸源性砕屑岩の整然層を伴うユニットIIIに区分され,構造的下位からユニットIII,II,Iの順で累重する.本研究では,粒度測定を用いた級化構造の記載法を提案し,それによって,本地域における砕屑岩類および枕状溶岩63ヶ所において上下判定を行うことができた.その結果,複数の大規模なブロックごとの上下判定結果は,一方向に一致する傾向がある.また,ユニットI,IIおよびIIIの砕屑岩整然層は北傾斜,南上位を示し,南北6kmにわたって逆転した構造を示す.一方,ユニットIIIの緑色岩-石灰岩体は北傾斜,北上位で上下正常である.この大規模逆転構造は,大規模な転倒褶曲によって説明される可能性がある.

DOI： 10.5575/geosoc.115.1

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記述言語：日本語   出版者・発行元：一般社団法人 日本地質学会  

DOI： 10.14863/geosocabst.2009.0.447.0

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：JAPAN ASSOC MINERALOGICAL SCIENCES  

Framboidal pyrite in mudstone is known to be a reservoir of arsenic, yet few studies have conducted quantitative analyses of framboidal pyrite with ppm-level sensitivity. In this study, we used micro-PIXE to measure the concentrations of heavy metals in framboidal pyrite from drill-core samples of mudstone from the Late Cretaceous Hakobuchi Group, central Hokkaido, Japan. Pyrite framboids that OCCUr in polyframboids can be divided into two types based on framboid diameter (D) and the average diameter of microcrystals within framboids (d): type 1, being relatively small grains; and type 2, being relatively large grains. Higher concentrations of As are observed in most type 2 framboids than in type 1 framboids. High concentrations of Pb generally occur as isolated islands within type I framboids, concentrated along the rims of polyframboids. It could be concluded that contrasting formation processes among different framboids led to the observed changes in heavy metal concentrations.

DOI： 10.2465/jmps.071019

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記述言語：日本語   出版者・発行元：愛媛大学  

Four volcaniclastic deposits from an outcrop in the eastern Tekeda City, Oita prefecture, southwestern Japan, have been investigated. Based on their mineral abundances, morphology and refractive indices of volcanic glass shards, four tephras correspond to Kuju Daiichi pumice fall (Kj-P1), Aira-Tn tephra (AT), Kikai-Akahoya volcanic ash (K-Ah) and Middle Danbaru scoria fall (DS) in ascending order.

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記述言語：日本語   出版者・発行元：日本地質学会  

DOI： 10.14863/geosocabst.2008.0.511.0

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担当区分：筆頭著者   出版者・発行元：GNS Science, Lower Hutt, New Zealand  

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出版者・発行元：GNS Science, Lower Hutt, New Zealand  

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出版者・発行元：The Geological Society of Japan  

北海道の中軸部を占める神居古潭変成帯は，従来から多くの研究者によって地質学的，構造地質学的，変成岩岩石学的および年代学的に研究されてきた．本巡検では，これまでの研究成果を総括し，神居古潭変成岩の原岩層序およびその形成プロセス，沈み込み帯深部における海山・海洋島などの海洋性地殻や遠洋性堆積物の底付けプロセスおよびその際の変形・変成作用を観察する．また，同変成岩から発見された沈み込み帯変成作用後に流入した流体による交代作用についても観察する．

DOI： 10.5575/geosoc.113.S103

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記述言語：日本語  

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記述言語：日本語   出版者・発行元：愛媛大学  

The sporophyte of the fern Pteris vittata is known to be a hyperaccumulator of arsenic in its fronds to>2.3% of its dry weight. However, very little has been stated about hyperaccumulation of arsenic by gametophytes of P. vittata. Here we report that gametophytes of P. vittata from Beppu City and Okinawa Island in western Japan hyperaccumulate arsenic in a similar manner to that observed in the sporophyte. The gametophytes from the Beppu City are able to grow in medium containing 10mM arsenate and accumulate>1.8% of their dry weight as arsenic. The results suggest gametophytes of P. vittata also have a great potential to be used for phytoremediation and the relative ability of tolerance and accumulation show some local variation of their sources.

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記述言語：日本語  

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：BLACKWELL PUBLISHING  

The low-grade metamorphosed Jurassic accretionary complex of the Northern Chichibu Belt, Hijikawa area, western Shikoku, is divided into two units, the Hijikawa and Kanogawa units, that are separated by an out-of-sequence thrust (OOST), the Ozu-Kawabegawa Fault. The Kanogawa unit south of the Ozu-Kawabegawa fault consists mainly of sandstone, shale, broken formation of alternating sandstone and shale, greenstone, chert, and pelitic melange, while the Hijikawa unit is characterized by a stack of subunits separated by small-scale thrusts. The subunits are mainly made up of basic, pelitic and psammitic semischists, schistose pelitic melange, and chert. Petrological and mineralogical constraints suggest peak metamorphic conditions of 204-247 degrees C at 1-3 kbar in the Kanogawa unit, and 228-289 degrees C at 3-5.6 kbar in the Hijikawa unit. Quartz and quartz-calcite veins are widely developed in the study area, especially in the Hijikawa unit. Regional variations in stable isotopic data show that the delta O-18(quartz) and delta O-18(calcite) values in veins tend to increase towards the Ozu-Kawabegawa Fault. The delta O-18(whole rock) values are remarkably high in some subunits close to OOSTs within the Hijikawa unit. Oxygen isotopic compositions from vein quartz indicate that a higher delta O-18 fluid migrated upward from depth along the Ozu-Kawabegawa Fault within the accretionary prism during prehnite-pumpellyite facies metamorphism. The fluid source is inferred to be pelitic rocks at higher temperatures and greater depths within the accretionary prism.

DOI： 10.1111/j1525-1314.2007.00701.x

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記述言語：英語  

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記述言語：日本語   出版者・発行元：一般社団法人 日本地質学会  

DOI： 10.14863/geosocabst.2007.0.255.0

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出版者・発行元：日本地下水学会, 日本水環境学会, 廃棄物資源循環学会, 地盤工学会, 土壌環境センター  

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記述言語：日本語   出版者・発行元：愛媛大学教育学部  

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記述言語：日本語   出版者・発行元：日本地質学会  

Fission-track dating of zircon and volcanic ash analysis were carried out for Bannosu volcanic ash in the Bisan-seto Group around the Bannosu region in the northeast Shikoku. The first reliable radiometric age, 0.63±0.14 Ma (1σ), was obtained for the volcanic ash layer. On the other hand, the refractive indexes of the volcanic glasses show the 1.5004-1.5071 (mode: 1.504-1.506). On the basis of these values and other petrographical data, this volcanic ash layer is correlated to the Kb-Ks volcanic ash. These results are important to discuss the sedimentary environment of the Seto Inland Sea in Pleiocene to Holocene.

DOI： 10.5575/geosoc.112.608

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記述言語：英語   出版者・発行元：日本地質学会  

DOI： 10.5575/geosoc.112.10.XIX_XX

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記述言語：日本語   出版者・発行元：土木春秋社  

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記述言語：日本語   出版者・発行元：土木研究所寒地土木研究所  

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記述言語：日本語   出版者・発行元：愛媛大学  

Tephra is an important natural laboratory for studying processes of magma genesis and eruption. The analysis deficit generally reflects accidental intersection of mounting epoxy adjacent to glass fragments or of unseen microvesicles within glass fragments by the analytical beam. Low totals of the analysis are more common in fine-grained samples (<0.25mm). In this study, quantitative chemical analysis on fine-grained volcanic glass shards (<0.25mm) has been carried out by new technique for mounting small volcanic glass shards. Thin Cu sheet has been used for mounting glass shards. Volcanic glass must be polished until its thickness become about half in pits of the Cu sheet. The result suggests that this method is available for the quantitative analysis of fine-grained glass shards (<0.25mm).

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記述言語：日本語   出版者・発行元：愛媛大学  

Olivine-orthopyroxene-andesite in Tobe Town, Ehime Prefecture, Japan has been investigated based on geology and petrology. It intrudes into the Mannen altered andesite but it has not undergone hydrothermal alteration. The olivine-orthopyroxene-andesite contains Mg-rich olivine and orthopyroxene and Cr-rich chromite. It is a high-Mg andesite (HMA) based on petrography and bulk rock chemistry. From the effect of the hydrothermal alteration the age of the intrusion is inferred to be immediately after the hydrothermal alteration of the Mannen altered andesite.

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記述言語：日本語   出版者・発行元：愛媛大学  

Abundance of trace elements including toxic heavy metals in water along the Tobe River system are determined by inductively coupled plasma-mass spectrometry (ICP-MS) to identify the origin of high contents of arsenic and antimony in the water around the area. Based on our new data, the highest contents of arsenic and antimony come locally from any groundwater related to the abandoned Koboshi-mine, in which mines mainly stibnite (antimony). The high abundances of the elements are diluted with increase of water volume. As the results, arsenic content through the river system becomes below the 0.01mg/L considered to be environmental criteria. On the other hand, the antimony content in the water is still too high as compared to item to be monitored. This is consistent with results of the previously reported value. We need further monitoring of the antimony contents through the river system.

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記述言語：日本語   出版者・発行元：愛媛大学  

We determined trace element abundance in twenty seven ferns and related lichen from the Mannen area, Tobe Town, Ehime Prefecture, to find plants for phytoremediation. Although the most ferns do not show specific accumulation for any toxic elements, Arachniodes standishii (Moore) Ohwi contains significant amount of antimony (max. 44μg/g-DW). Further greenhouse pot experiment is needed to test the possibility for the fern as the accumulator.

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記述言語：日本語   出版者・発行元：愛媛大学  

Tourmaline-bearing amphibolite was found in the Kokuryogawa area, central Shikoku, Japan as rolling stones from Tonaru amphibolite mass. They can be devided into three types; Type 1; tourmaline in garnet-kyanite-horlnblendite. Type 2; vein tourmaline in rock, and Type 3; tourmaline in quartz vein of amphibolite. Tourmaline compositions of type 1 and 2 are high X_<Mg> (0.70-0.83; 0.83-0.87, respectively) although those of type 3 is comparatively low dravite component (X_<Mg> 0.60-0.64). Compositional fields of type 1 and 2 correspond to that of tourmaline in oligoclase-biotite zone of Tonaru area. It is inferred that the tourmalines were formed during the Sanbagawa metamorphic peak and retrograde metamorphism.

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記述言語：日本語   出版者・発行元：日本鉱物科学会  

The Japanese Association of Mineralogists, Petrologists and Economic Geologists, The Mineralogical Society of Japan and Ehime University held the open symposium on asbestos problem at Ehime University in September, 2005. Asbestos is a fibrous mineral that is chemically inert with heat resistant properties and has been used in over 3000 products for fire proofing, thermal, electrical and sound insulation, plasters, roof and flooring materials, gasket and friction products. However, the inhalation of asbestos fibers causes various serious illnesses of the lungs. Most uses of asbestos are prohibited in many countries. We would like to widely introduce the asbestos and its related problem and contribute the answer of this problem in some way.

DOI： 10.2465/gkk.35.1

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出版者・発行元：日本地下水学会, 日本水環境学会, 廃棄物資源循環学会, 地盤工学会, 土壌環境センター  

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記述言語：日本語   出版者・発行元：日本鉱物科学会  

The term asbestos is a generic designation given to six types of naturally occurring mineral fibers that are or have been used in commercial products. These fibers belong to two mineral groups: serpentines and amphiboles. The serpentine group contains a single asbestiform variety: chrysotile. The amphibole group contains five asbestiform amphibole varieties: anthophyllite, grunerite (amosite), riebeckite (crocidolite), tremolite and actinolite.<br>     These fibrous minerals share several properties which qualify them as asbestiform fibers. They are bundles of fibers which can be easily cleaved into thinner fibers. Several properties that make asbestos so versatile and cost effective are high tensile strength, chemical and thermal stability, high flexibility, and low electrical conductivity.<br>     Asbestos fibers have been used in a broad variety of industrial application; some 3000 applications such as roofing products, gaskets, and friction products. 80% of imported asbestos is used for cement products such as asbestos boards and slates which are used for building materials, 7% for friction materials, and less than 3% for asbestos textile. Nearly all of the asbestos produced worldwide is chrysotile. Historically, chrysotile has accounted for more than 90% of the world's asbestos production, and it presently accounts for over 99% of the world production. Two types of amphiboles, commonly designated as amosite and crocidolite are no longer mined. With the onset of the health issues concerning asbestos in the late 1960s and early 1970s, world production and consumption began to decline during the 1980s. Japan used approximately 6.7 million tons between 1974 and 2004. About 67% of this amount was used since 1930.<br>     The relationship between workplace exposure to airborne asbestos fibers and respiratory diseases is one of the most widely studied subjects of modern epidemiology. The research efforts resulted in significant consensus that asbestos fibers can be associated with diseases of asbestosis, lung cancer and mesothelioma. Its carcinogenic nature, an overall lack of knowledge of minimum safe exposure levels, and the long latency for the development of lung cancer and mesothelioma are the main contributing factors to these controversies.

DOI： 10.2465/gkk.35.3

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その他リンク： https://jlc.jst.go.jp/DN/JALC/00273730420?from=CiNii

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記述言語：日本語   出版者・発行元：物理探査学会  

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記述言語：日本語   出版者・発行元：日本鉱物科学会  

本研究では，付加体中の緑色岩類から発見された中古生代の海洋域の地下微生物による岩石組織について岩石学的に検討を行った．北海道常呂帯緑色岩中の微生物による組織は２つのタイプに分けられる．一つは枕状溶岩のガラス質急冷縁部，もう一つは熱水変質作用を受けた玄武岩質ハイアロクラスタイトである．前者は粒状タイプと管状タイプに区分される．後者の熱水変質岩では，球体もしくは楕円体が連結した管状組織によって特徴付けられる． 一方，四国西部柳谷地域の緑色岩中の菌類化石は塊状玄武岩中の方解石もしくは緑泥石プール・脈中から発見された．菌類の菌糸体は弧状で，しばしば分岐している．今回，低変成度の付加体緑色岩中に微生物による組織の形態が良好に保存されていることが明らかになった．また，常呂帯の熱水変質岩中の微生物は，現在知られている生存温度限界を超える条件で生存していた可能性がある．

DOI： 10.14824/jampeg.2005.0.107.0

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記述言語：日本語   出版者・発行元：愛媛大学  

Mine drainage and yellowish brownish precipitation (so called "yellow boy") in the Ichinokawa mine, Saijyo City, Ehime prefecture, Japan, have been geochemically investigated. The mine drainage reaching the Ichinokawa River originates in the Senga gallery of the Ichinokawa mine. The Ichinokawa mine drainage is characteristically high in arsenic and exceeds the water-quality standard on arsenic. The yellowish brownish precipitation is characterized by high iron, arsenic and antimony contents. It is supposed that the Ichinokawa mine drainage has been formed by pyrite weathering. The drainage does not have a negative impact on the water quality of the Ichinokawa River. However, the Ichinokawa rivers may be degraded by the Ichinokawa mine drainage in future.

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記述言語：日本語   出版者・発行元：愛媛大学  

Phytoremediation is the use of plants for the in situ cleanup of contaminated soils, sediments, and ground water. Pot-scale experiment evaluated phytoremediation by Pteris vittata L. (Chinese brake fern) for mudstone containing arsenic (12.3 mg/kg-DW) of the Hakobuchi Group in the Yubari City, central Hokkaido, Japan. In this experiment, fronds of Pteris vittata L. were taken after 18 weeks growth in soil. The following properties became clear after examining the experimental results. (1) The brake fern can growth in the soil made from mudstone containing arsenic. (2) The highest arsenic concentrations in the frond of Pteris vittata L. growing in the soil are about 3000 mg/kg-DW. (3) The fern removed arsenic about 10 % from mudstone. The results suggested that the brake fern has a great poten tial to be used for phytoremediating soils with low concentration of arsenic.

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記述言語：日本語   出版者・発行元：愛媛大学  

Arsenic hyperaccumulation and tolerance in gametophytes and spores ofPteris vittata L. (brake fern) have been investigated. Gametophytes are able to grow normally in medium containing 50 to 200 or 300 μM arsenite and arsenate. In medium containing <300 μM arsenite and 500 μM arsenate, gametophytes do not almost grow. The highest arsenic concentrations in gametophytes are about 1,023 and 920 mg/kg-DW in medium containing 300 μM of arsenite and arsenate. The results suggest that gametophytes of the brake fern also has a great potential to be used for phytoremediating soils with low concentration of arsenic.

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記述言語：日本語   出版者・発行元：愛媛大学  

In this paper, formation process of Ichinokawa breccia and antimony-arsenic mineralization in the breccia in the Ichinokawa area of Saijyo City, Ehime Prefecture, Japan, has been studied on the basis of geological, petrological and geochemical data. We have focussed on "hydraulic fracturing" process for the genesis of the Ichinokawa conglomerate. Ichinokawa conglomerate can be divided mainly into Ichinokawa breccia and Myojin Group. Carbonate-rich breccia and sandstone filling fractures are also found in the Sanbagawa schists adjacent to the Ichinokawa breccia. High-angle breccia zones, the Ichinokawa breccia, cut across the Sanbagawa schistocity. The Ichinokawa breccia consist principally of breccias which have been partly altered and veined by quartz, carbonate minerals and pyrite, and matrix of carbonate-rich sandstone. Schist clasts (up to 10 m across) in the breccia are angular but not variably rotated. Breccias are both clast- and matrix-supported and show evidence for single fracturing and healing by hydrothermally precipitated minerals such as carbonate minerals, pyrite, stibnite, pyrite and quartz. Two Sb and As-rich zones in the Ichinokawa breccia along the Ichinokawa River are about 10-30 m wide adjacent to the Sanbagawa schists. As and Sb values of carbonate matrix in the breccia are extremely high. These observations suggest that the the Ichinokawa breccia formed through a hydrofracturing process associated with hydrothermal fluid infiltrated into Sanbagawa metamorphic as precursor of the antimony ore forming. Hydrothernal fluid seems to have caused mineralization of carbonate minerals and sulfide minerals. Afterwards, the Myojin Group was accumulated above on the Ichinokawa breccia.

添付ファイル： AN10408332_2005_11-09.pdf

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記述言語：日本語   出版者・発行元：愛媛大学  

Precise quantitative analyses of arsenic for a small amount of dried plant samples (～10 mg) by instrumental neutron activation analyses (INAA) and inductively coupled plasma-mass spectrometry (ICP-MS) were developed to evaluate environmental purification of soil and water by phytoremediation technique. To confirm the reliability of the analytical methods, we measured standard material NIES No.l (pepperbush). Obtained arsenic contents of the NIES No.l by INAA and ICP-MS were 2.18 ± 0.03 μg/g-DW and 2.25 ± 0.03 μg/g-DW, respectively. Both results agree well with the certificated value of the NIES standard (2.3 ± 0.3 μg/g-DW). Results by both analytical methods for the higher arsenic contents ofPteris vittata L. (～4,000 μg/g) were also satisfied to confirm the accuracy. Consequently, we conclude that both quantitative analytical methods are appropriate for determine the wide range of arsenic content in small amount of plant samples.

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記述言語：日本語   出版者・発行元：愛媛大学  

Mode of occurrences of sulfide minerals and As concentrations of samples from a HORIzontal boring core of Mannen altered andesite in the Tobe Town, Ehime Prefecture, Japan, has been investigated based on petrography, mineralogy and geochemistry. The Mannen altered andesite intrudes into the vicinity of boundary between the Sanbagawa metamorphic rocks and the Middle Miocene Kuma group. The andesite body has undergone extensive hydrothermal alteration, and has domains of a high concentration of As, S and Sb. Index alteration minerals are pyrite, arsenopyrite, marcasite, stibnite, quartz, opal, carbonate minerals, chlorite, illite and kaolinite. In the Mannen arrear textures of sulphide minerals can be divided into the following six types; sparse, sand spot pool and vein, and black-ink-drawing types. The black-ink-drawing type is characterized by the abundance in marcasite and arsenopyrite. The high concentration domains in arsenic are in general agreement with that characterzed by sulphide minerals of the black-ink-drawing type. Sb, S and As are extremely added and Na_2O, MgO, CaO and FeO are depleted in the Mannen andesites during the hydrothermal alteration on the basis of isocon analyses.

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記述言語：日本語   出版者・発行元：愛媛大学  

The weathering process of Mannen altered andesite in Tobe Town, Ehime Prefecture, Japan, has been investigated based on geology, petrography and geochemistry. The Mannen andesite intrudes into the Sanbagawa metamorphic rocks and the Middle Miocene Kuma group. The andesite dyke have undergone extensive hydrothermal alteration and mineralization, and has domains of a high concentration of As, S and Sb. Index alteration minerals are pyrite, arsenopyrite, marcasite, stibnite, quartz, carbonate, chlorite, titanite and illite. The weathering types in the near surface of the Mannen andesite is divided into five based on the degree of progress of weathering. That results show that domains of sulphide minerals-rich altered andesite are extremely weathered. CaO, Fe_2O_3, MgO, Pb, Cu, Sb, S and As are depleted in weathered parts of the Mannen andesite based on isocon analysis. Especially, Fe_2O_3, S and As are extremely depleted in weathered parts of sulphide minerals-rich altered andesites. It shows that sulphide minerals in the andesite are decomposed by interaction of surface water and microbial activity, and these elements are leaching away to surrounding environments.

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記述言語：日本語   出版者・発行元：愛媛大学  

Seventeen trace element abundance (Li, Al, V, Cr, Mn, Co, Ni, Cu, Zn, Ga, As, Rb, Sr, Cd, Cs, Ba and Pb) for 4 fountains and 8 river waters derived from the high As-bearing Mannen andesite body, Tobe-town, Ehime prefecture, were determined for environmental assessment by inductively coupled plasma-mass spectrometry (ICP-MS). We had predicted high arsenic contents in the surface waters, because the local geologic background contains extremely high arsenic content (max. 1200 ppm As). The arsenic contents in the waters are low (<3.5 ng/g) contrary to our expectations, which the concentrations of the arsenic are below the environmental standard (<10 ng/g As). However, there is still in danger of increasing the arsenic contents by abrupt environmental change such as expansion project of road and tunnel in the area. The construction may produce large amount of rock debris including abnormally high arsenic. Consequently, further weathering of the debris at the surface condition must cause new liquation into surface water of arsenic from the rock. On the other hand, river water around the former Choshi-daki sulfide-ore Mine in the andesite body contains abnormally high zinc content (ca. 200 ng/g). This must be influenced by solve out of zinc ions to the water from the country rock. We need further environmental monitoring for the water condition.

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記述言語：日本語   出版者・発行元：愛媛大学  

Geology and hydrothermal alteration of the Mannen altered andesite in Tobe Town, Ehime Prefecture, Japan, has been investigated based on field survey and petrography. The Mannen andesite intrudes into the Sanbagawa metamorphic rocks and the Middle Miocene Kuma group after the formation of breccia including only clasts of the Sanbagawa basic schist. The Mannen andesite body have undergone extensive hydrothermal alteration and mineralization. The alteration is characterized by the occurrences of quartz, illite, kaolinite, carbonates, chlorite, anaterze, pyrite, arsenopyrite, marcasite, stibnite and chalcopyrite. The texture of sulfide minerals can be divided into five types, sparse, sand, spot, vein and pool, black-ink-drawing types on the basis of the mode of occurrences of sulfide minerals.

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記述言語：日本語   出版者・発行元：地質汚染− 医療地質− 社会地質学会  

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記述言語：日本語   出版者・発行元：地質汚染− 医療地質− 社会地質学会  

J-GLOBAL

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記述言語：日本語   出版者・発行元：地質汚染− 医療地質− 社会地質学会  

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記述言語：日本語   出版者・発行元：日本地質学会  

四国北西部に存在する南北系の地形構造の一つ,松山平野"堀江低地"について,重力異常探査および既存のボーリング資料により検討を行った.ボーリング資料より,低地下に東落ちの基盤深度の不連続帯およびこれに向かって急傾斜する堆積層の地層境界面の存在が明らかになった.また,重力探査によると,明瞭な負のブーゲー異常帯が低地とほぼ平行に存在することが明らかになり,その西端部の急変帯は上記の基盤深度の不連続帯によることが解明された.これらのデータより,走向が北北西-南南東で,東落ちの堀江断層が低地下に伏在すると推定される.堀江断層は正断層成分を持ち,堀江低地下に堆積盆を形成しており,南方の中央構造線活断層系の分布域まで延長されると考えられる.堀江断層は,少なくとも更新世には活動していたと推定される.

DOI： 10.5575/geosoc.110.746

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記述言語：日本語   出版者・発行元：公益社団法人地盤工学会  

Volcanic rock and sedimentary rock often contain heavy metal. Heavy metal gives bad influence to health of human body. In general, excavation gravel containing heavy metal is processed by interception using sheet. But durability of sheet is not eternity. We examined chemical tecnique by rock or clay replacing with sheet. Some materials such as sandstone or kaolin clay reduce quantity of dissolution of heavy metal from excavation gravel. In the future, it is important to use materials of nature in order to intercept the diffusion of heavy metal.

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記述言語：日本語   出版者・発行元：愛媛大学  

The results of quantitative chemical analysis on volcanic glass shards are discussed with examination of analytical technique. The apparatus being used is Oxford Link ISIS energy dispersion X-ray microanalyzer (EDS) with JEOL JSM-5400 scanning electron microscope (SEM). Some analyzed samples are AT ash in the Sadohara-cho, Miyazaki Prefecture and Hirano tephra in the Nomura-cho, Ehime prefecture. The results show that (1) The available finest 15kV acceralation voltage, 4.00×10^^&lt;-10&gt;A beam current of exposed electron beam and 30 seconds of acquisition live time, (2) the volcanic glass shards show low K_2O contents in the edge, which is changed in quality, (3) analytical technique is that the use of polished internal surface of glasses until a thickness of glass shards become about half, (4) The data of glass shard should be checked and selected by H_2O contents.

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記述言語：英語   掲載種別：研究論文（大学，研究機関等紀要）   出版者・発行元：兵庫教育大学  

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：放散虫研究会筑波支部, 大阪微化石研究会  

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記述言語：日本語   出版者・発行元：地質汚染− 医療地質− 社会地質学会  

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記述言語：日本語   出版者・発行元：地質汚染− 医療地質− 社会地質学会  

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記述言語：日本語   出版者・発行元：地質汚染− 医療地質− 社会地質学会  

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記述言語：英語   出版者・発行元：日本地質学会  

DOI： 10.5575/geosoc.109.XXIII

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DOI： 10.5575/geosoc.108.XIII

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記述言語：日本語  

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DOI： 10.5575/geosoc.107.XXI

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記述言語：日本語  

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記述言語：英語   出版者・発行元：The Geological Society of Japan  

A corona is a small-scale structure developed around a mineral grain by reaction with its surroundings. It could indicate a change in chemical and/or physical factors during a prograde or retrograde metamorphic event, or associated with cooling from igneous temperatures (Kretz, 1994). The olivine-plagiocalse corona is one of distinct and most common examples of them in metamorphosed rocks.<BR>In Ontario, the Grenville Orogen comprises the Central Gneiss Belt and the structurally overlying Central Metasedimentary Belt, divided into a northeastern Elzevir terrane and a southeastern Frontenac terrane. The Chenaux gabbro intrusion is one of plutons in the Raglan gabbro belt at the base of the Elzevir terrane hanging wall (Pehrsson et al., 1996) (Fig.1). It was emplaced during the late stage of the regional metamorphism and deformation, culminated at ca.1.1 Ga.<BR>The Chenaux Gabbro is partly deformed and recrystallized on the amphibolite facies condition. Intrusive contacts between the gabbro and surrounding carbonate rocks are observed at various places (Fig.2 (1)). It has occasionally igneous layering (Fig.2 (2)). The principal constituents of the gabbro are plagiolclase, olivine, clinopyroxene, orthopyroxene and calcic amphiboles, with small amounts of biotite, spinel and Fe-Ti oxides.

DOI： 10.5575/geosoc.107.IX

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記述言語：日本語   出版者・発行元：日本地質学会  

The Omogiyama hornfels is one of the hornfelses sporadically occurring in the Sanbagawa metamorphic belt, central and western Shikoku, southwest Japan. They are originated from the Sanbagawa basic schists and distributed parallel to its schistosity. Large igneous bodies have not been found around the hornfels. The hornfelses are characterized by the assemblage of hornblende + actinolite + biotite + plagioclase + quartz. Based on the lack of large igneous rocks and the mode of occurrence of the Omogiyama hornfels, it seems that the hornfels was formed by high-temperature fluid flow along the schistosity of the Sanbagawa basic schists.

DOI： 10.5575/geosoc.106.244

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その他リンク： https://jlc.jst.go.jp/DN/JALC/00065966112?from=CiNii

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：GEOCHEMICAL SOC JAPAN  

Chemical characteristics of "diagenetic" and "hydrogenous" type deep-sea nodules from the central and northeastern Pacific were studied regarding their Ce anomalies and Y fractionation from heavy REE. Pacific nodules of both types show low Y/Ho ratios less than average shales or chondrites, contrasting to the other marine samples (seawaters, limestones, and phosphorites) having higher Y/Ho ratios than average shales or chondrites. The "hydrogenous" type nodules show large positive Ce anomalies up to log(Ce/Ce*) = +0.6, whereas the "diagenetic" type nodules display only small positive Ce anomalies or even small negative ones. Two nodule subsamples, which are characterized by 10 Angstrom manganate but are chemically the intermediate between the two types, show Ce anomalies of log(Ce/Ce*) = +0.3 in the middle of the two end members. Interestingly, the Ce anomalies of the nodules vary coherently with their logarithmic Co/(Ni+Cu) ratios. This positive correlation is valid even after combing many literature data of Pacific nodules with our data. In the plot of Ce anomaly vs, log[Co/(Ni+Cu)], the three distinct types of Pacific nodules are systematically distinguished: "suboxic-diagenesis" less than or equal to "diagenetic" less than or equal to "hydrogenous". The systematics strongly suggest that: (i) the Ce anomaly and log[Co/(Ni+Cu)] are similar geochemical indexes showing how effectively oxidative uptake of Ce and Co occurred in each nodule relative to nonoxidative uptake of nutrient-type metals in the respective metal groups, and (ii) there exists an initial source supplying metals common to all the types of Pacific nodules. We inferred from various reasons that the common initial source is biogenic particulates delivered from overlying surface water. Oxidative uptake of Ce and Co by fast sinking large biogenic particulates is less effective, but such particulates can more effectively convey nutrient-type metals involved with them to the sea floor because of their shorter residence time in oxic water. However, the relationship between metal transports of scavenged- and nutrient-type elements is reversed in the case of slowly sinking biogenic particulates. High surface productivity inevitably provides high flux of fast sinking large organic particulates, whereas low productivity gives rise to organic particulate flux dominated by slowly sinking small ones. These mechanisms explain the observed systematics of Ce anomaly vs. log[Co/(Ni+Cu)] plots for Pacific nodules.

DOI： 10.2343/geochemj.33.399

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記述言語：日本語   出版者・発行元：日本地質学会  

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記述言語：日本語   出版者・発行元：地学団体研究会  

北海道中軸部の空知-エゾ帯の中に位置する中生代付加体("神居古潭帯")の一つである美瑛コンプレックスは,A・B・C・Dの4つのユニットに区分される.ユニットAは泥質/珪質片岩からなる結晶片岩ユニットである.ユニットBは変成緑色岩ユニットで,ブドウ石-パンペリー石相から緑色片岩相をへて角閃岩相にわたる3つの変成サブユニットに区分され,低圧型変成作用を被っている.白雲母K-Ar変成年代は114-117Maである.ユニットCは弱変成緑色岩類と少量の砕屑岩類からなる混在ユニットで,その中には"墨流し状構造"呼ばれる特異な薄板状混在構造が観察される.このような混在ユニットは,沈みこみスラブのスライス化とデュプレックス化によって形成されたと考えられる.ユニットDほ非変形緑色岩類からなる.これらの4ユニットは,互いに構造的な接触関係にある.特に,ユニットDはユニットB・Cの上に低角で衝上しており,"オイチャン・ナップ"を形成している.美瑛コンプレックスの構造区分対比は,以下のようになる.ユニットAの分布は北方の神居古潭峡谷地域で模式地の神居古潭変成岩類に連続している.ユニットBは海洋底変成作岡を被った幌加内オフィオライト(空知層群)に対比される.ユニットCとDは岩清水コンプレックスに対比される.美瑛コンプレックスは,これらのテクトニックユニットが合体したものである.

DOI： 10.15080/agcjchikyukagaku.52.6_433

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記述言語：日本語   出版者・発行元：地学団体研究会  

北海道中軸部の空知-エゾ帯の中に位置する中生代付加体("神居古潭帯")の一つである美瑛コンプレックスは,A・B・C・Dの4つのユニットに区分される.ユニットAは泥質/珪質片岩からなる結晶片岩ユニットである.ユニットBは変成緑色岩ユニットで,ブドウ石-パンペリー石相から緑色片岩相をへて角閃岩相にわたる3つの変成サブユニットに区分され,低圧型変成作用を被っている.白雲母K-Ar変成年代は114-117Maである.ユニットCは弱変成緑色岩類と少量の砕屑岩類からなる混在ユニットで,その中には"墨流し状構造"呼ばれる特異な薄板状混在構造が観察される.このような混在ユニットは,沈みこみスラブのスライス化とデュプレックス化によって形成されたと考えられる.ユニットDほ非変形緑色岩類からなる.これらの4ユニットは,互いに構造的な接触関係にある.特に,ユニットDはユニットB・Cの上に低角で衝上しており,"オイチャン・ナップ"を形成している.美瑛コンプレックスの構造区分対比は,以下のようになる.ユニットAの分布は北方の神居古潭峡谷地域で模式地の神居古潭変成岩類に連続している.ユニットBは海洋底変成作岡を被った幌加内オフィオライト(空知層群)に対比される.ユニットCとDは岩清水コンプレックスに対比される.美瑛コンプレックスは,これらのテクトニックユニットが合体したものである.

DOI： 10.15080/agcjchikyukagaku.52.6_433

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記述言語：日本語   出版者・発行元：日本地質学会  

秩父累帯の主要部は, ジュラ紀の付加体からなる. 付加体に含まれるチャートや石灰岩などの海洋性物質について, その堆積年代や含まれる化石の古生物地理学上の特徴を明らかにすることにより,秩父累帯の形成モデルに制約を与えることができる. また, 地質構造の特徴は, 付加体形成から現在にいたるまでのプロセスを反映している, 秩父累帯を構成する主要なユニットについて, 露頭のようすや山塊の表情を紹介する. 斗賀野ユニットと三宝山ユニットは南部秩父帯に, 柏木ユニット, 住居附ユニットおよび沢谷ユニットは北部秩父帯にそれぞれ属する.

DOI： 10.5575/geosoc.104.XXI

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記述言語：日本語   出版者・発行元：日本地質学会  

秩父累帯の主要部は, ジュラ紀の付加体からなる. 付加体に含まれるチャートや石灰岩などの海洋性物質について, その堆積年代や含まれる化石の古生物地理学上の特徴を明らかにすることにより,秩父累帯の形成モデルに制約を与えることができる. また, 地質構造の特徴は, 付加体形成から現在にいたるまでのプロセスを反映している, 秩父累帯を構成する主要なユニットについて, 露頭のようすや山塊の表情を紹介する. 斗賀野ユニットと三宝山ユニットは南部秩父帯に, 柏木ユニット, 住居附ユニットおよび沢谷ユニットは北部秩父帯にそれぞれ属する.

DOI： 10.5575/geosoc.104.563

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記述言語：日本語  

DOI： 10.5575/geosoc.104.604

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DOI： 10.5575/geosoc.104.604

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記述言語：日本語   出版者・発行元：日本地質学会  

西南日本全域の秩父累帯研究のレビューをとおして，付加体地質の観点から秩父累帯全域に適用しうるユニット区分を提案した．北部秩父帯には，構造的上位からペルム紀の沢谷ユニット，ジュラ紀古・中世の遊子川ユニット，住居附ユニット，上吉田ユニット，ジュラ紀末・白亜紀古世の柏木ユニットが識別された．一方，南部秩父帯には，構造的上位から，ジュラ紀から白亜紀古世にわたる大平山ユニット，斗賀野ユニット，三宝山ユニットが識別された．このユニット区分を用いて四国西部の地質を見直し，秩父累帯の3次元像を描いた．黒瀬川帯の構成岩類は，南北をそれぞれ南部秩父帯および北部秩父帯のユニットに構造的に挟まれ，板状をなすとともに，北西に向かって尖滅する．このような四国西部における黒瀬川帯の分布様式の形成には，三波川変成作用（100Ma前後）以降に，この地域で特異的に起こった付加体深部相の上昇運動が関わっている． / This paper proposes a unit division applicable for the entire Chichibu Composite Belt based primarily on lithologic character. The Permian Sawadani Unit (NC-P), Lower-Middle Jurassic Yusugawa (NC-Js), Sumaizuku (NC-Jα), Kamiyosida (NC-Jβ) units, and uppermost Jurassic-Lower Cretaceous Kashiwagi Unit (NC-JK), technically from top to bottom, are recognized in the Northern Chichibu Belt. The Jurassic-Lower Cretaceous Ohirayama (SC-Jα), Togano (SC-Jβ) and Sambosan (SC-JK) units are recognized in the Southern Chichibu Belt. Oceanic plate stratigraphy for accretionary complexes in the Northern and Southern Chichibu belts are generally similar to each other, but some critical differences are also recognizable. The Sambagawa metamorphism affected accretionary complexes not only of the Northern Chichibu Belt but also of the Southern Chichibu Belt. A 3-D diagram using this unit division for the Chichibu Composite Belt in western Shikoku is depicted. Components of the Kurosegawa Belt are tectonically sandwiched between units of the Northern and Southern Chichibu belts and die out to the northwest. The following processes well explain the distribution pattern of the Kurosegawa Belt in the area : (1) formation of accretionary complexes in the Northern and Southern Chichibu belts, (2) juxtaposition of the Northern Chichibu and Southern Chichibu belts due to large-scale strike slip movement, (3) Sambagawa metamorphism (ca. 100Ma), and (4) local exhumation of deeper part of Southern Chichibu accretionary complexes.

DOI： 10.5575/geosoc.104.634

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記述言語：日本語   出版者・発行元：日本地質学会  

西南日本全域の秩父累帯研究のレビューをとおして，付加体地質の観点から秩父累帯全域に適用しうるユニット区分を提案した．北部秩父帯には，構造的上位からペルム紀の沢谷ユニット，ジュラ紀古・中世の遊子川ユニット，住居附ユニット，上吉田ユニット，ジュラ紀末・白亜紀古世の柏木ユニットが識別された．一方，南部秩父帯には，構造的上位から，ジュラ紀から白亜紀古世にわたる大平山ユニット，斗賀野ユニット，三宝山ユニットが識別された．このユニット区分を用いて四国西部の地質を見直し，秩父累帯の3次元像を描いた．黒瀬川帯の構成岩類は，南北をそれぞれ南部秩父帯および北部秩父帯のユニットに構造的に挟まれ，板状をなすとともに，北西に向かって尖滅する．このような四国西部における黒瀬川帯の分布様式の形成には，三波川変成作用（100Ma前後）以降に，この地域で特異的に起こった付加体深部相の上昇運動が関わっている． / This paper proposes a unit division applicable for the entire Chichibu Composite Belt based primarily on lithologic character. The Permian Sawadani Unit (NC-P), Lower-Middle Jurassic Yusugawa (NC-Js), Sumaizuku (NC-Jα), Kamiyosida (NC-Jβ) units, and uppermost Jurassic-Lower Cretaceous Kashiwagi Unit (NC-JK), technically from top to bottom, are recognized in the Northern Chichibu Belt. The Jurassic-Lower Cretaceous Ohirayama (SC-Jα), Togano (SC-Jβ) and Sambosan (SC-JK) units are recognized in the Southern Chichibu Belt. Oceanic plate stratigraphy for accretionary complexes in the Northern and Southern Chichibu belts are generally similar to each other, but some critical differences are also recognizable. The Sambagawa metamorphism affected accretionary complexes not only of the Northern Chichibu Belt but also of the Southern Chichibu Belt. A 3-D diagram using this unit division for the Chichibu Composite Belt in western Shikoku is depicted. Components of the Kurosegawa Belt are tectonically sandwiched between units of the Northern and Southern Chichibu belts and die out to the northwest. The following processes well explain the distribution pattern of the Kurosegawa Belt in the area : (1) formation of accretionary complexes in the Northern and Southern Chichibu belts, (2) juxtaposition of the Northern Chichibu and Southern Chichibu belts due to large-scale strike slip movement, (3) Sambagawa metamorphism (ca. 100Ma), and (4) local exhumation of deeper part of Southern Chichibu accretionary complexes.

DOI： 10.5575/geosoc.104.634

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その他リンク： http://hdl.handle.net/10191/6267

記述言語：日本語  

DOI： 10.5575/geosoc.104.590

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記述言語：日本語   出版者・発行元：Japan Association of Mineralogical Sciences  

Metamorphic biotites have been found from the pumpellyite-actinolite facies basic semischists in the northern Chichibu Belt, western Shikoku, Japan. Representative mineral assemblages of the northern Chichibu basic semischists in the study area are chlorite+phengite+calcite, riebeckite+phengite+chlorite+calcite, riebeckite+stilpnomerane+chlorite+calcite, biotite+riebeckite+chlorite+calcite and biotite+riebeckite+phengite+chlorite+calcite. Albite, titanite, hematite and quartz are common. The biotites occur in high-MgO basic semischists and are rich in phlogopite content. The mineral parageneses systematically change depending on MgO/(MgO+FeO) of bulk compositions.<br>     The bioitite-calcite-bearing basic semischists were metasomatically altered based on petrographical and geochemical data. The isocon diagram suggests that CaO and MgO were added in significant amounts and Na₂O, K₂O and P₂O₅ were removed. It seems that the increase in MgO due to metasomatism is a cause of the formation of biotite under the pumpellyite-actinolite facies.

DOI： 10.2465/ganko.93.291

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記述言語：日本語   出版者・発行元：The Japanese Association for Petroleum Technology  

Fission track fading in apatite has been measured in samples from the Shin-Yahiko-1 well, which is situated in a very young sedimentary basin in Japan. Fission track densities were too low to detect confined fission tracks, and consequently semi-track lengths were measured directly instead.<br>Mean lengths and frequency distribution of semi-tracks decrease clearly and progressively with increasing temperature and depth below 4, 400m, and the fading zone of semi-tracks spans an interval of less than 1, 500m, and 40°C in temperature.<br>The smooth trend of fission track fading in the Shin Yahiko-1 well suggests a relatively simple subsidence burial history, which is concordant with the burial history roughly estimated from ages of planktonic foraminifers.<br>From the Shin Yahiko-1 well data, fission track fading over a a very short effective heating time (0.05Ma) delineates a zone on the vitrinite reflectance nomograph.<br>GC/MS analysis suggests that the oil produced from the Shin Yahiko-1 originated from the highly matured Teradomari Formation, which occurs at a depth greater than 4, 500m and roughly corresponds to the top of apatite fission track fading zone.<br>Semi-track length measurement is useful as a supplementary thermal indicator even for very young basins, especially in igneous basement rocks where vitrinites are absent.

DOI： 10.3720/japt.62.544

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：BLACKWELL SCIENCE INC  

The Susunai Complex of southeast Sakhalin represents a subduction-related accretionary complex of pelitic and basic rocks. Two stages of metamorphism are recognized: (1) a local, low-P/T event characterized by Si-poor calcic amphiboles; (2) a regional, high-P/T event characterized by pumpellyite, actinolite, epidote, sodic amphibole, sodic pyroxene, stilpnomelane and aragonite. The major mineral assemblages of the high-P/T Susunai metabasites contain pumpellyite + epidote + actinolite + chlorite, epidote + actinolite + chlorite, epidote + Na-amphibole + Na-pyroxene + chlorite + haematite. The Na-amphibole is commonly magnesioriebeckite. The Na-pyroxene is jadeite-poor aegirine to aegirine-augite. Application of empirically and experimentally based thermobarometers suggests peak conditions of T = 25-300 degrees C, P = 4.7-6 kbar. Textural relationships in Susunai metabasite samples and a petrogenetic grid calculated for the Fe3+-rich basaltic system suggest that pressure and temperature increased during prograde metamorphism.

DOI： 10.1111/j.1525-1314.1997.00037.x

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：SPRINGER-VERLAG WIEN  

Fe and Mn distribution in the pumpellyite group minerals (W(8)X(4)Y(8)Z(12)O(56-n),,(OH).) has been studied by using Fe-57 Mossbauer spectroscopy. The studied Fe-pumpellyites, belonging to the pumpellyite-julgoldite series, were collected from two localities; metabasites in the Tokoro belt, Hokkaido, and gabbroic sills in the Shimane Peninsula, Japan. Okhotskite, an Mn3+-dominant pumpellyite group mineral, was separated from the ores of metamorphosed manganiferous iron ore deposits in the Tokoro belt. Fe-57 Mossbauer spectrum of Tokoro Fe-pumpellyite is composed of two Fe2+- and two Fe3+-doublets. On the basis of the single crystal structure refinements of Al-pumpellyites published so far, doublets were assigned to Fe-W(2+), (IS = 1.01 and QS = 2.,73 mm/s), Fe-X(2+) (IS = 0.97 and QS = 3.18 mm/s), Fe-X(3+):+ (IS = 0.29 and QS = 1.37 mm/s) and Fe-Y(3+); (IS = 0.36 and QS = 2.09 mm/s), where IS is isomer shift relative to a metallic iron absorber and QS is quadrupole splitting. The Mossbauer spectrum of the Mitsu Fe-pumpellyite is composed of three doublets assigned to Fe-X(2+) (IS = 1.14 and QS = 3.20mm/s), Fe-X(3+) (IS = 0.36 and QS = 1.13mm/s) and Fe-Y(3+), (IS = 0.37 and QS = 1.93mm/s). These assignments show strong preference of Fe3+ in the X-site. The Mossbauer spectrum of the okhotskite is composed of two doublets by Fe-X(3+) (IS = 0.37 and QS = 1.13 mm/s) and Fe-Y(3+) (IS = 0.42 and QS = 2.18 mm/s). The area ratio shows that Fe-X(3+):Fe-Y(3+) ratio is 94:6. On the basis of chemical and Mossbauer analyses, Mn-X(3+):Mn-Y(3+) ratio is given as 19:81, indicating stronger Y-site preference of Mn3+ than Fe3+, what is consistent with Jahn-Teller theory. Al, Mn3+ and Fe3+ prefer the Y-site in this order.

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DOI： 10.5575/geosoc.103.167

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記述言語：日本語   出版者・発行元：日本地質学会  

DOI： 10.5575/geosoc.103.953

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その他リンク： https://jlc.jst.go.jp/DN/JALC/00382677104?from=CiNii

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DOI： 10.5575/geosoc.103.47

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：SPRINGER VERLAG  

The Middle Miocene Tobe hornfels in the Sanbagawa metamorphic belt, western Shikoku, southwest Japan, is characterized by an abnormally steep metamorphic gradient compared with other hornfelses associated with intrusive bodies. The basic hornfels, originally Sanbagawa greenschist rocks, is divided into the following three metamorphic zones: plagioclase, hornblende, and orthopyroxene. The plagioclase zone is defined by the appearance of calcic plagioclase, the hornblende zone by the assemblage of hornblende+calcic plagioclase+quartz, and the orthopyroxene zone is characterized by the assemblage of orthopyroxene + clinopyroxene + plagioclase + quartz. Calcic amphibole compositions change from actinolite to hornblende as a result of the continuous reactions during prograde metamorphism. Petrographical and thermometric studies indicate a metamorphic temperature range of 300-475 degrees C for the plagioclase zone, 475-680 degrees C for the hornblende zone, and 680-730 degrees C for the orthopyroxene zone. The temperature gradient based on petrological studies is approximately 5 degrees C/m, which is unusually high. Geological and petrological studies demonstrate that the hornfelses were formed by the focusing of high-temperature fluids through zones of relatively high fracture permeability. The steep thermal gradient in the Tobe hornfels body is consistent with a large fluid flux, greater than 8.3 X 10(-7) m(3) m(-2)S(-1), over the relatively short duration of metamorphism, approximately 100 years.

DOI： 10.1007/s004100050227

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DOI： 10.1029/94JB00958

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記述言語：英語   出版者・発行元：日本地質学会  

DOI： 10.5575/geosoc.100.575

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：American GEOPHYSICAL UNION  

Accretion of a large number of seamounts or fragments of huge oceanic plateaus is recorded in the geology of Japan. Major accretion occurred twice; a late Early Carboniferous seamount chain accreted in latest Permian to Middle Jurassic time, and a Late Jurassic oceanic plateau accreted in the Early Cretaceous. The Late Jurassic plateau now in northern Japan and Sakhalin is here named the ''Sorachi Plateau '' and a Tithonian age for it is well documented on the basis of microfossils from pelagic cherts and limestones. Petrochemical characteristics of basalts suggest two kinds of sources; depleted mantle under oceanic lithosphere and enriched mantle related to plume upwelling. All the accreted fragments in Japan can be traced back to the central part of the Panthalassa by using paleomagnetic data and plate ''trajectory analysis.'' The timing of generation of the accreted seamount chain and the plateau is consistent with a time of global change. Their place of origin, in the mid-Panthalassa, retains a positive residual geoid anomaly and slow Vp in the lower mantle, which suggest a past upwelling of hot material from the core-mantle boundary.

DOI： 10.1029/94TC00351

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記述言語：日本語  

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DOI： 10.5575/geosoc.99.831

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出版者・発行元：日本地質学会  

DOI： 10.5575/geosoc.99.615

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記述言語：日本語   出版者・発行元：日本地質学会  

DOI： 10.5575/geosoc.99.335

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記述言語：日本語   出版者・発行元：日本地質学会  

Geology, metamorphic petrology and K-Ar age of the Tsuzuragawa hornfels in the Sanbagawa metamorphic belt, western Shikoku, were investigated. The basic hornfels, originally Sanbagawa green schist, are divided into three metamorphic zones; plagioclase zone, hornblende zone and orthopyroxene zone, based on their mineral assemblages. The plagioclase zone is defined by the appearance of calcic plagioclase. The hornblende zone is characterized by the appearance of hornblende + plagioclase. The assemblage in pyroxene hornfels are clinopyroxene + orthopyroxene + plagioclase + ilmenite at the orthopyroxene zone. The P-T path of the Tsuzuragawa hornfels corresponds to a metamorphic facies series of typical contact metamorphism. One K-Ar hornblende age of hornblende-biotite hornfels is 15.1 Ma. The Tsuzuragawa and genetically related hornfels should be thermally formed by the infiltration of high-temperature fluid along a large fracture in the Sanbagawa metamorphic rocks in or slightly prior to the Middle Miocene volcanism and plutonism.

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

Abstract A deep section of accretionary complex, the metamorphosed Susunai Complex, is observed on Sakhalin Is., Russia. High pressure part of pumpellyite‐actinolite facies metavolcanics, metacherts and metapelites are well exposed and constitute a tectonic pile preserving primary structures related to underplating of the oceanic crust. Three stages of deformation, D1 through D3, suggest successive deformation during subduction, underplating and exhumation of the complex. Oceanic material in the complex is more abundant than other well documented ancient accretionary complexes (e.g. the Shimanto Belt in southwest Japan and the Ghost Rocks Formation in Alaska), which were shallowly underplated. At Susunai, deep down‐stepping of a décollément has scraped off the upper part of the oceanic crust, primarily the pillowed basalt horizon. This down‐stepping results from crustal weakening as overpressured water is released from the fractured oceanic crust during metamorphism. Copyright © 1992, Wiley Blackwell. All rights reserved

DOI： 10.1111/j.1440-1738.1992.tb00067.x

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：OXFORD UNIV PRESS UNITED KINGDOM  

The metabasites within the Tokoro belt of eastern Hokkaido, Japan, suffered pervasive high-P/T metamorphism. Mineral assemblages and compositions of more than 400 metabasites from the Saroma-Tokoro district were investigated.
The metabasites are divided into six metamorphic zones based on mineral assemblages. The laumontite (Lm) zone is defined by the presence of laumontite. The prehnite-pumpellyite (Pr-Pp) zone is characterized by the association of prehnite + pumpellyite. The lawsonite-sodic pyroxene (Lw-Napx) zone is defined by the assemblage lawsonite + pumpellyite + sodic pyroxene + chlorite. The epidote-sodic pyroxene (Ep-Napx) (1) and (2) zones are characterized by the assemblage epidote + pumpellyite + sodic pyroxene + chlorite. The former is characterized by the absence of aragonite, sodic amphibole, and winchite, as well as the presence of jadeite-poor sodic pyroxene (max.Jd mol % = 13), whereas these minerals occur in the Ep-Napx(2) zone, together with jadeite-rich sodic pyroxene (max.Jd mol % = 34). In the epidote-actinolite (Ep-Act) zone, the most common assemblages contain epidote + actinolite + pumpellyite + chlorite.
The Lm zone corresponds to the zeolite facies (150-200-degrees-C and 1-2 kb) and the Pr-Pp zone is equivalent to the prehnite-pumpellyite facies (200-250-degrees-C and 2-2.5 kb). The Ep-Napx(1) zone appears to be stable at approximately 200-250-degrees-C and 2.5-3.5 kb. The pressure conditions in the Lw-Napx, Ep-Napx(2), and Ep-Act zones appear to range from 5 to 6 kb, and the temperatures are estimated to be 200-230, 230-270, and 270-300-degrees-C, respectively. The sequence of the metamorphic zones is characterized by the curved P-T path.
The stability field of pumpellyite + sodic pyroxene + chlorite in Fe3+-bearing metabasites is located in the lower-temperature and higher-pressure part of the pumpellyite-actinolite facies. On the basis of Schreinemakers' method, the stability field of the assemblage is bounded by a high-pressure reaction Pp + Napx + Chl + Ab + Qz +H2O = Lw + Gl, and by a high-temperature reaction Pp + Napx + Chl + Ab + Qz = Ep + Gl + H2O.

DOI： 10.1093/petrology/32.2.333

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記述言語：日本語   出版者・発行元：海洋出版  

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出版者・発行元：海洋出版  

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記述言語：日本語   出版者・発行元：日本地質学会  

DOI： 10.5575/geosoc.95.241

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：SPRINGER-VERLAG WIEN  

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記述言語：英語   出版者・発行元：Japan Association of Mineralogical Sciences  

北海道東部常呂帯の常呂地域の仁頃層群緑色岩類は高圧中間群タイプの変成作用を受けている。アラレ石は緑色岩中に広域的に見い出され,一般に方解石をパッチ状に置換して出現する。アラレ石は,石英-方解石脈またはプール中でパンペリー石,ローソン石,縁レン石,緑泥石と共生するが,アルカリ輝石,アクチノ閃石,ウィンチ閃石とはほとんど共生しない。アラレ石の産出は仁頃層群の変成相系列が高圧中間群の高圧部に相当することを示しており,それは累進的な圧力増加によって形成されたと考えられる。

DOI： 10.2465/ganko1941.81.446

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：WILEY-BLACKWELL  

DOI： 10.1111/j.1525-1314.1986.tb00360.x

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記述言語：日本語   出版者・発行元：地学団体研究会  

DOI： 10.15080/agcjchikyukagaku.40.3_205

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記述言語：日本語   出版者・発行元：地学団体研究会  

The area investigated around Mt. Nikoro-yama is made up of the Mesozoic sedimentary and volcanic rocks which are divided into the Yubetsu Group, Nikoro Group, and Saroma Group. The Nikoro Group is composed mainly of greenstones such as basaltic and trachytic pillow lavas,, hyaloclastites, dolerite and trachyte dykes, ultramafic cumulates, and a small amount of chert and limestone. Volcaniclastic conglomerate, sandstone, siltstone, and shale are associated with the greenstones and are found in the Lower Part of the Nikoro Group. The volcanic piles of the Nikoro Group are considered as remnants of Jurassic seamounts from the following reasons; (1) explosive volcanism producing a large amount of hyaloclastite and strongly vesiculated pillow lavas, (2) alkali basalt magmatism from alkali olivine basalt to trachyte, (3) presence of volcaniclastic sedimentary rocks, and (4) lack of terrigenous sediments. Boulder and cobble conglomerate observed at the base of the Saroma Group irregularly covers greenstones of the Nikoro Group. No evidence of submarine basaltic volcanism is recognized in the Saroma Group composed entirely of clastic sedimentary rocks. The rapid change of lithofacies from the Nikoro to Saroma Groups as well as the distribution and occurrence of the basal conglomerate might indicate the presence of unconformity The basal conglomerate contains large numbers of well-rounded boulders and cobbles; 58〜78 modal % pyroxene andesite, 0〜10% hornblende andesite, 0〜2% rhyolite, 0〜4% monzonite, 0〜16% porphyritic monzonite, 0〜2% monzogabbro, 0〜2% slate and sandstone, 2〜4% trachyte, 5〜18% basalt and hyaloclastite. The abundance of calc-alkaline andesites and alkaline plutonics suggests that the materials have been derived mainly from a continental margin or an island arc. In this connection, it is noticed that the similar rock types are known in the Cretaceous formations of the Nemuro Group. Accordingly, the boulders and cobbles are considered to be originated in the Paleo-Kurile Arc in late Cretaceous time. At the time forming the unconformity, seamounts of the Nikoro Group might have been emplaced to the western margin of the Paleo-Kurile Arc, where a large amount of terrigenous elastics were supplied.

DOI： 10.15080/agcjchikyukagaku.38.6_408

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記述言語：日本語   出版者・発行元：一般社団法人日本応用地質学会  

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記述言語：日本語   出版者・発行元：一般社団法人 日本地質学会  

DOI： 10.14863/geosocabst.2009.0.210.0

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記述言語：日本語   出版者・発行元：日本地質学会  

DOI： 10.14863/geosocabst.2008.0.469.0

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記述言語：日本語   出版者・発行元：日本地質学会  

DOI： 10.14863/geosocabst.2008.0.293.0

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記述言語：日本語   出版者・発行元：日本地質学会  

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記述言語：日本語   出版者・発行元：日本地質学会  

DOI： 10.14863/geosocabst.2008.0.513.0

CiNii Books

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