摘要:
运用煤岩学和地球化学的理论和方法,对重庆长河碥矿晚三叠世须家河组煤中微量元素进行了研究。结果表明,长河碥矿各煤层中明显富集Pb,其平均值为29.58μg/g。长河碥矿煤中潜在的有害微量元素Be (5.9μg/g)、Cr (28.6μg/g)、Cu (34.06μg/g)、As (10.03μg/g)和Th (12.49μg/g)均较富集;稀土元素含量为59.79287μg/g,均值为136.92μg/g,略高于中国煤中稀土元素总量均值(119.7μg/g),高于美国煤中的稀土元素总量均值(53.59μg/g)。8煤中稀土元素含量异常可能是地下水淋滤作用的结果。长河碥矿煤中有害微量元素主要受控于陆源物质的供给。
Abstract:
Five Late Triassic coal samples collected from Changhebian mine,Chongqing were characterized through a petrographic and geochemical investigation.The results showed that Pb is enrich in every samples,the mean content is 29.58 μg/g.Other hazardous elements such as Be(5.9 μg/g),Cr(28.6 μg/g),Cu(34.06 μg/g),As(10.03 μg/g) and Th(12.49 μg/g) are also concentrated in the coalfield.In addition,the content of REE ranging from 59.79 to 287 μg/g, with an arithmetic mean of 136.92 μg/g,which is closed to the Chinese coals(119.7 μg/g) and higher than that of American coals(53.59 μg/g).Especially, unusual character of REE in No.8 coal seam probably may be caused by the leaching process of ground water.The origin of the hazardous elements was mainly dominated by the source rock from Kangdian uplift.
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