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New Data and Evidence on the Mineralogy and Geochemistry of Wulantuga High-Ge Coal Deposit of Shengli Coalfield, Inner Mongolia, China

1
Key Laboratory of Tectonics and Petroleum Resources, China University of Geosciences, Ministry of Education, Wuhan 430074, China
2
Institute of Environmental Assessment and Water Research, CSIC, C/LLuis Solé Sabarís s/n, 08028 Barcelona, Spain
*
Author to whom correspondence should be addressed.
Minerals 2020, 10(1), 17; https://doi.org/10.3390/min10010017
Received: 8 November 2019 / Revised: 14 December 2019 / Accepted: 19 December 2019 / Published: 24 December 2019
The mode of occurrence and origin of highly-enriched trace elements, especially Ge, in Wulantuga high-Ge coal deposit have been widely reported. In this study, coal samples and several coalified trunks embedded within the roof strata are collected, which provides a good opportunity to further confirm if Ge is mainly associated with organic matter. Minerals in coal samples are mainly quartz, kaolinite, montmorillonite, pyrite, and gypsum, along with trace albite, barite, chlorite, and Fe-oxide, while those in coalified trunk samples include melanterite, pyrite, and gypsum, with traces of chlorite and magnesiocopiapite. Germanium, As, W, Sb, Hg, Be, and Cs are enriched in coal samples, and these elements are also enriched in the coalified trunks and roof glutenite. The elevated contents of Ge, As, W, Sb, and Hg were almost exclusively derived from the influx of hydrothermal fluids as evidenced by the presence of pyrite veins and chamosite as well as enhanced elemental associations of Ge-W and As-Sb-Hg in the studied lignite samples. The coalified trunks in the study area should be taken into consideration due to the high contents of hazardous elements that cause potential environmental impacts during mining waste disposal and land reclamation. View Full-Text
Keywords: China; Germanium; coal; Wulantuga; coalified trunk China; Germanium; coal; Wulantuga; coalified trunk
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Yao, C.; Zhuang, X.; Querol, X.; Li, J.; Li, B.; Moreno, N.; Zhang, F. New Data and Evidence on the Mineralogy and Geochemistry of Wulantuga High-Ge Coal Deposit of Shengli Coalfield, Inner Mongolia, China. Minerals 2020, 10, 17.

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