Element geochemical characteristics and formation environment for the roof, floor and gangue of coal seams in the Gujiao mining area, Xishan coalfield, China

作者: Gang Wang , Yiwei Xie , Yong Qin , Jinxi Wang , Jian Shen

DOI: 10.1016/J.GEXPLO.2018.04.007

关键词: Coal miningBasaltGeochemistryCoalPaleosalinityGeologyFluorescence spectrometryLithologySedimentary rockGangue

摘要: Abstract The roof, floor and gangue samples of coal seams were collected from a borehole in the Gujiao mining area. vertical distribution major elements, trace elements rare earth (REEs) was tested through X-ray fluorescence spectrometry inductively coupled plasma-mass (ICP-MS). formation environment material source strata analysed. results showed that seam are Si Al, followed by Fe, K, Ti. In Shanxi Formation, Sn, B, Ta, Bi, Th, U, Li, Be, Nb, In, Cs Hf enriched. Taiyuan Sr, Mo Sb Be Formation Mo, enriched hazardous elements. ratios Sr/Ba, U/Th, Ni/Co V/Cr could indicate paleosalinity redox conditions. mainly formed an oxic environment. roof No. 7 8 limestone, indicating anoxic suboxic to dysoxic environments. lithology is complex, including sedimentary rocks, granite alkaline basalt. Most distributed at intersection basalt, dual sourcing

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