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Open AccessArticle

Mineralogical Characteristics of Early Permian Paragonite-Bearing Coal (No. 3) in the Jinyuan Mine, Tengxian Coalfield, Shandong Province, Eastern China

1
Key Laboratory of Resource Exploration Research of Hebei Province, Hebei University of Engineering, Handan 056038, China
2
Institute for Atmospheric and Environmental Sciences Faculty of Geoscience and Geography, Goethe-University Frankfurt, 60438 Frankfurt, Germany
*
Author to whom correspondence should be addressed.
Minerals 2020, 10(8), 714; https://doi.org/10.3390/min10080714
Received: 24 July 2020 / Revised: 9 August 2020 / Accepted: 10 August 2020 / Published: 12 August 2020
(This article belongs to the Collection Minerals in Coal and Coal Combustion Products)
The Early Permian coal is of great value in the Tengxian Coalfield, Shandon Province, Eastern China. This work deals with the new data focusing on mineralogical characteristics in the Early Permian Shanxi Formation No. 3 coal from the Jinyuan Mine. The Jinyuan coal is a low ash and highly volatile A bituminous coal. Minerals in the No. 3 coal mainly comprise of kaolinite, ankerite, illite, calcite, siderite, and quartz, with varying compositions of trace amounts of pyrite, jarosite, bassanite, anatase, and rutile. According to mineral assemblage in the coal plies, three Types (A to C) can be identified in the No. 3 coal. The dominant minerals in Type A are poorly-ordered kaolinite, illite, quartz, pyrite, and jarosite. Type B is mainly composed of well-ordered kaolinite, illite, siderite, ankerite, and calcite. Type C, with just one sample (JY-3-7c), which contains high proportions of calcite (54%) and ankerite (34%). Terrigenous minerals are elevated in coal plies that typically have relatively high contents of ash yield. The formation of syngenetic pyrite was generally due to seawater, while the sulphate minerals (jarosite and coquimbite) were derived from the oxidation of pyrite. Epigenetic vein-like or fracture-fillings carbonate minerals (ankerite, calcite, and siderite), kaolinite, and pyrite, as well as authigenic quartz were derived from the influx of hydrothermal fluids during different periods, from the authigenic to epigenetic. The paragonite in the coal may have been formed by the precipitated from Na-rich hydrothermal fluids. No effects of magmatic intrusion on mineralogy were investigated in this research. View Full-Text
Keywords: Early Permian; coal; minerals; terrigenous; hydrothermal fluids; seawater influence Early Permian; coal; minerals; terrigenous; hydrothermal fluids; seawater influence
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MDPI and ACS Style

Guo, W.; Li, J.; Wang, Z.; Zhang, K.; Gao, Z.; Ma, J.; Zhao, C. Mineralogical Characteristics of Early Permian Paragonite-Bearing Coal (No. 3) in the Jinyuan Mine, Tengxian Coalfield, Shandong Province, Eastern China. Minerals 2020, 10, 714. https://doi.org/10.3390/min10080714

AMA Style

Guo W, Li J, Wang Z, Zhang K, Gao Z, Ma J, Zhao C. Mineralogical Characteristics of Early Permian Paragonite-Bearing Coal (No. 3) in the Jinyuan Mine, Tengxian Coalfield, Shandong Province, Eastern China. Minerals. 2020; 10(8):714. https://doi.org/10.3390/min10080714

Chicago/Turabian Style

Guo, Wenmu; Li, Jinxiao; Wang, Zhenzhen; Zhang, Ke; Gao, Zheng; Ma, Jialiang; Zhao, Cunliang. 2020. "Mineralogical Characteristics of Early Permian Paragonite-Bearing Coal (No. 3) in the Jinyuan Mine, Tengxian Coalfield, Shandong Province, Eastern China" Minerals 10, no. 8: 714. https://doi.org/10.3390/min10080714

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