Geological controls on coal quality of the Yili Basin, Xinjiang, Northwest China
Geological controls on coal quality of the Yili Basin, Xinjiang, Northwest China
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DOI：
10.1016/j.coal.2014.06.013
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发表时间：
2014-09-01
影响因子：
5.6
通讯作者：
Zhao, Shihua
中科院分区：
文献类型：
--
作者：
Li, Baoqing;Zhuang, Xinguo;Zhao, Shihua
本文总结了地质、岩石学、地球化学和矿物学分析的结果，以确定新疆伊犁盆地煤质的地质控制。采集了Q12ZK01和Z40ZK1两个钻孔以及皮里青和木丝巷煤矿的48个煤样。八道湾组和西山窑组含煤地层的基陷速率不同，决定了其沉积环境、沼泽地下水位和陆源补给程度的差异。这些因素可能会进一步造成煤质的差异。Q12ZK01矿和木丝巷矿八道湾组煤的镜质组含量、灰分含量、挥发分含量、总矿物含量和大部分元素含量均高于皮里青矿和Z40ZK1矿西山窑组煤。八道湾组煤比西山窑组煤具有较高的挥发分产率，这可能是由于镜质组含有较高的挥发分所致。与国内外煤的平均浓度相比，伊犁煤主要富含钙、钠、镁、锰、钴、锶、巴、钨等元素，其他元素均呈亏损状态。硅、铝、钾、锂、钛、铬、铜、铍、锆、铅等元素和部分稀土元素(La、Ce、Pr、Nd、Sm)主要与铝硅酸盐矿物共生。木寺乡矿和Z40ZK1煤中的铁、镁、锰主要与碳酸盐矿物共生。木丝巷煤矿煤中的硫、钴、镍，Q12ZK01和Z40ZK1煤中的B主要表现为有机亲和性。木丝巷煤矿煤中的钠可能存在于卤水中。(C)2014爱思唯尔B.V.保留所有权利。
This study summarizes the results of geological, petrographical, geochemical, and mineralogical analyses performed to determine the geological controls on coal quality of the Yili Basin in Xinjiang province, northwest China. Forty-eight coal samples were collected from boreholes Q12ZK01 and Z40ZK1, and Piliqing and Musixiang coal mines. The difference in base subsidence rate between the coal-bearing strata Badaowan and the Xishanyao Formations determines these differences of depositional environments, swamp groundwater table, and degree of terrigenous supply. These factors may further cause the difference in coal quality. The vitrinite contents, ash yields, volatile matter yields, total mineral contents, and most element contents are higher in coals of the Badaowan Formation from the Q12ZK01 and the Musixiang mine than those of the Xishanyao Formation from the Piliqing mine and the Z40ZK1. The high volatile matter yields of the coals in the Badaowan Formation, relative to those in the Xishanyao Formation, may be due to higher content of vitrinite that contains more volatile matters. In comparison with the average concentrations for Chinese and worldwide coals, the Yili coals are enriched mainly in Ca, Na, Mg, Mn, Co, Sr, Ba, and W, but the other elements are depleted in the Yili coals. Elements including Si, Al, K, Li, Ti, Cr, Cu, Rb, Zr, Pb, and some REE (La, Ce, Pr, Nd, Sm) are predominantly associated with aluminosilicate minerals. Iron, Mg, and Mn in the coals of the Musixiang mine and Z40ZK1 are associated mainly with carbonate minerals. Sulfur, Co, and Ni in the Musixiang mine coals, and B in the coals of Q12ZK01 and the Z40ZK1 mainly show an organic affinity. Sodium in the Musixiang mine coals may occur in the brines. (C) 2014 Elsevier B.V. All rights reserved.