Composition and mode of occurrence of minerals in Late Permian coals from Zhenxiong County, northeastern Yunnan, China

Springer Science and Business Media LLC - Tập 1 Số 1 - Trang 13-22 - 2014
Li Tian1,2, Shifeng Dai2, Jianhua Zou1, Sen Zhang1, He-Hing Tian1, Lixin Zhao2
1Chongqing Research Center of State Key Laboratory of Coal Resources and Safe Mining, Chongqing, China
2State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Beijing, China

Tóm tắt

AbstractMinerals in the Late Permian coals from the Niuchang-Yigu mining area, Zhenxiong County, northeastern Yunnan, China, were investigated using optical microscopy and low temperature ashing plus X-ray diffraction (LTA + XRD). The results showed that minerals in the coal LTAs are mainly quartz, kaolinite, chamosite, mixed-layer illite/smectite (I/S), pyrite, and calcite, with trace amounts of marcasite, dolomite, and bassanite. The authigenic quartz generally occurs in collodetrinite or as a filling in cleats or cell cavities. This silica was mainly derived from aqueous solutions produced by the weathering of basaltic rocks in the Kangdian Upland and from hydrothermal fluids. The presence of β-quartz paramorph grains in collodetrinite probably indicates that these grains were detrital and came from a volcanic ash. Clay minerals are generally embedded in collodetrinite and occur as cell-fillings. Pyrite occurs as framboidal, anhedral, and euhedral grains and a cell-filling. The coals are high in pyrite and the high pyrite content probably results from seawater invading during the stage of peat accumulation. Calcite generally occurs as vein-fillings, indicating an epigenetic origin.

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Tài liệu tham khảo

Bouška V, Pešek J, Sykorova I (2000) Probable modes of occurrence of chemical elements in coal. Acta Mont. Serie B Fuel Carbon Miner Process Praha 10:53–90

Chen SQ, Chen JH, Zhao SJ (1992) Occurrence character of pyrite in coal of the upper part of the Late Permian coal measures in eastern Ynnan and western Guizhou. Bull Yichang Inst Geol Miner Resour (CAGS) 18:135–145 (in both Chinese and English)

China Coal Geology Bureau (1996) Sedimentary environments and coal accumulation of Late Permian coal formation in Western Guizhou, Southern Sichuan and Eastern Yunnan, China. Chongqing University Press, Chongqing (in Chinese with English abstract)

Chinese Standard GB/T 15224.1-2010 (2010) Classification for quality of coal. Part 1: Ash (in Chinese)

Chinese Standard GB/T 15224.2-2010 (2010) Classification for quality of coal. Part 2: Sulfur content (in Chinese)

Chinese Standard GB/T 212-2008 (2008) Proximate analysis of coal (in Chinese)

Chinese Standards GB/T 214-1996 (1996) Determination of total sulfur in coal (in Chinese)

Chinese Standards GB/T 474-2008 (2008) Method for preparation of coal sample (in Chinese)

Dai SF, Chou CL (2007) Occurrence and origin of minerals in a chamosite-bearing coal of Late Permian age, Zhaotong, Yunnan, China. Am Miner 92:1253–1261

Dai SF, Tian LW, Chou CL, Zhou YP, Zhang MQ, Zhao L, Wang JM, Yang Z, Cao HZ, Ren DY (2008) Mineralogical and compositional characteristics of Late Permian coals from an area of high lung cancer rate in Xuan Wei, Yunnan, China: occurrence and origin of quartz and chamosite. Int J Coal Geol 76:318–327

Dai SF, Wang XB, Seredin VV, Hower JC, Ward CR, O’keefe MKJ, Huang WH, Li T, Li X, Liu HD, Xue WF, Zhao LX (2012a) Petrology, mineralogy, and geochemistry of the Ge-rich coal from the Wulantuga Ge ore deposit, Inner Mongolia, China: new data and genetic implications. Int J Coal Geol 90–91:72–99

Dai SF, Jiang YF, Ward CR, Gu LD, Seredin VV, Liu HD, Zhou D, Wang XB, Sun YZ, Zou JH, Ren DY (2012b) Mineralogical and geochemical compositions of the coal in the Guanbanwusu Mine, Inner Mongolia, China: further evidence for the existence of an Al (Ga and REE) ore deposit in the Jungar coalfield. Int J Coal Geol 98:10–40

Dai SF, Ren DY, Chou CL, Finkelman RB, Seredin VV, Zhou YP (2012c) Geochemistry of trace elements in Chinese coals: a review of abundances, genetic types, impacts on human health, and industrial utilization. Int J Coal Geol 94:3–21

Dai SF, Zhang WG, Ward CR, Seredin VV, Hower JC, Li X, Song WJ, Wang XB, Kang H, Zheng LC, Wang PP, Zhou D (2013) Mineralogical and geochemical anomalies of late Permian coals from the Fusui Coalfield, Guangxi Province, southern China: influences of terrigenous materials and hydrothermal fluids. Int J Coal Geol 105:60–84

Dai SF, Li T, Seredin VV, Ward CR, Hower JC, Zhou YP, Zhang MQ, Song XL, Song WJ, Zhao CL (2014) Origin of minerals and elements in the Late Permian coals, tonsteins, and host rocks of the Xinde Mine, Xuanwei, eastern Yunnan, China. Int J Coal Geol 121:53–78

International Committee for Coal and Organic Petrology (ICCP) (1998) The new vitrinite classification (ICCP System 1994). Fuel 77:349–358

International Committee for Coal and Organic Petrology (ICCP) (2001) The new inertinite classification (ICCP System 1994). Fuel 80:459–471

Kortenski J (1992) Carbonate minerals in Bulgarian coals with different degrees of coalification. Int J Coal Geol 20:225–242

Moore DM, Reynolds RC (1989) X-ray diffraction and the identification and analysis of clay minerals. Oxford University Press, New York

Ren DY (1996) Mineral matters in coal. In: Han DX (ed) Coal Petrology of China. Publishing House of China University of Mining and Technology, Xuzhou, pp 67–77 (in Chinese with English abstract)

Rietveld HM (1969) A profile refinement method for nuclear and magnetic structures. J Appl Crystallogr 2:65–71

Ruan CD, Ward CR (2002) Quantitative X-ray powder diffraction analysis of clay minerals in Australian coals using Rietveld methods. Appl Clay Sci 21:227–240

Tang XY, Huang WH (2004) Trace elements in Chinese coals. The Commercial Press, Beijing (in Chinese)

Taylor JC (1991) Computer programs for standardless quantitative analysis of minerals using the full powder diffraction profile. Powder Diffr 6:2–9

Taylor GH, Teichmüller M, Davis A, Diessel CFK, Littke R, Robert P (1998) Organic Petrology. Gebrüder Borntraeger, Berlin 704

Wang XB (2011) Enrichment and differentiation mechanism of mineral matter in the Late Permian coals from Eastern Yunnan Province. Doctor’s Thesis, China University of Mining and Technology, Beijing (in Chinese with English abstract)

Wang XB, Dai SF, Chou CL, Zhang MQ, Wang JM, Song XL, Wang W, Jiang YF, Zhou YP, Ren DY (2012) Mineralogy and geochemistry of Late Permian coals from the Taoshuping Mine, Yunnan Province, China: evidences for the sources of minerals. Int J Coal Geol 96–97:49–59

Wang XB, Zhang MQ, Zhang WG, Wang JM, Zhou YP, Song XL, Li T, Li X, Liu HD, Zhao LX (2013) Occurrence and origins of minerals in mixed-layer illite/smectite-rich coals of the Late Permian age from the Changxing Mine, eastern Yunnan, China. Int J Coal Geol 102:26–34

Ward CR (2002) Analysis and significance of mineral matter in coal seams. Int J Coal Geol 50:135–168

Ward CR, Spears DA, Booth CA, Staton I, Gurba LW (1999) Mineral matter and trace elements in coals of the Gunnedah Basin, New South Wales, Australia. Int J Coal Geol 40:281–308

Ward CR, Taylor JC, Matulis CE, Dale LS (2001) Quantification of mineral matter in the Argonne Premium coals using interactive Rietveld-based X-ray diffraction. Int J Coal Geol 46:67–82

Zhou YP (1999) The synsedimentary alkalinity-volcanic ash derived tonsteins of early Longtan age in South-western China. Coal geol Explor 27:5–9 (in Chinese with English abstract)

Zhou YP, Ren YL (1983) Genesis and distribution of tonsteins in late-Permian coalfields in Southwestern China. J China Coal Soc 8:76–88 (in Chinese with English abstract)

Zhou YP, Ren YL, Bohor BF (1982) Origin and distribution of tonsteins in Late Permian coal seams of Southwestern China. Int J Coal Geol 2:49–77

Zhou YP, Tang DZ, Burger K (1990) Synsedimentary volcanic ash-derived illite tonsteins in late Permian coal-bearing deposits of southwestern China. Acta Sedimentol Sin 8:85–93 (in Chinese with English abstract)

Zhou YP, Bohor BF, Ren YL (2000) Trace element geochemistry of altered volcanic ash layers (tonsteins) in Late Permian coal-bearing formations of eastern Yunnan and western Guizhou Province, China. Int J Coal Geol 44:305–324