minerals Article The Petrography, Mineralogy and Geochemistry of Some Cu- and Pb-Enriched Coals from Jungar Coalfield, Northwestern China Dongna Liu 1,3 ID , Anchao Zhou 1, Fangui Zeng 1,3, Fenghua Zhao 2,3,* and Yu Zou 2 1 College of Minging Engineering, Taiyuan University of Technology, Taiyuan 030024, China;
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[email protected]; Tel.: +86-010-62331878 Received: 24 September 2017; Accepted: 21 December 2017; Published: 27 December 2017 Abstract: The petrological, geochemical, and mineralogical composition of the Carboniferous-Permian coal deposit in the Jungar coalfield of inner Mongolia, Northwestern China, were investigated using optical microscopy and field emission scanning electron microscopy in conjunction with an energy-dispersive X-ray spectrometer (SEM-EDX), as well as X-ray powder diffraction, X-ray fluorescence, and inductively coupled plasma mass spectrometry. The Jungar coal is of high volatile C/B bituminous quality with 0.58% vitrinite reflectance and has a low sulfur content of 0.70% on average. Inertinite (mineral-free basis) generally dominates in coal from the lower part of the Shanxi formation, and vitrinite is the major maceral assemblage in the coal from the Taiyuan formation, which exhibits forms suggesting variation in the sedimentary environment. The Jungar coal is characterized by higher concentrations of copper (Cu) in No.