TY  - JOUR
A1  - Guo, Wenmu
A1  - Li, Jinxiao
A1  - Wang, Zhenzhen
A1  - Zhang, Ke
A1  - Gao, Zheng
A1  - Ma, Jialiang
A1  - Zhao, Cunliang
T1  - Mineralogical characteristics of early permian paragonite-bearing coal (No. 3) in the Jinyuan Mine, Tengxian coalfield, Shandong Province, Eastern China
T2  - Minerals
N2  - 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.
KW  - Early Permian
KW  - coal
KW  - minerals
KW  - terrigenous
KW  - hydrothermal fluids
KW  - seawater influence
Y1  - 2020
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/55269
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-552697
SN  - 2075-163X
VL  - 10
IS  - 714
SP  - 1
EP  - 16
PB  - MDPI
CY  - Basel
ER  -