滇东黔西晚二叠世煤中伴生元素的富集特征  

ENRICHMENT CHARACTERISTICS OF ASSOCIATED ELEMENTS IN COALFORMED IN THE LATE PERMIAN IN EAST YUNNAN AND WEST GUIZHOU

作　　者：胡琳 杜伟 杨明鹏 HU Lin;DU Wei;YANG Ming-peng(Yunnan Province Coal Product Quality Inspection Station,Qujing 655000,China)

机构地区：[1]云南省煤炭产品质量检验站,云南曲靖655000

出　　处：《云南地质》2024年第S01期37-43,共7页Yunnan Geology

摘　　要：通过X射线衍射、显微组分分析和ICP-MS等离子体质谱分析研究了滇东黔西晚二叠世龙潭组煤及煤矸石中伴生元素的富集特征。结果表明:煤中富集SiO_(2)、Al_(2)O_(3)、Fe_(2)O_(3)、Na_(2)O、K_(2)O、CaO、MgO和TiO_(2)等常量元素氧化物,SiO_(2)和Al_(2)O_(3)比值平均为2.27,煤系中富含石英等富硅矿物,微量元素富集差异较大。贵州毕节地区富含Li、Cu、Ga、Nb、U等微量元素,六盘水地区轻度富集V、Co、Cu、Se、Zr、La、Ce、Sm、Eu和Tb等元素。云南富源地区富集Se元素,轻度富集Th、Cr、Pb等微量元素,Hg含量在正常范围,罗平地区轻度富集Co、Cu、Zr、Nb和Ta等微量元素;煤中微量元素富集主要受西侧康滇古陆物源区峨眉山玄武岩碎屑物质输入及成煤时期的海水作用的影响。The enrichment characteristics of associated elements in coal and coal ganguefrom the Late Permian Longtan Formation in eastern Yunnan and western Guizhou were studied by using X-ray diffraction,microscopic component analysis,and ICP-MS analysis.The results indicate that the coal is enriched in SiO_(2),Al_(2)O_(3),Fe_(2)O_(3),Na_(2)O,K_(2)O,CaO,MgO,and TiO_(2),with an average SiO_(2)/Al_(2)O_(3) ratio of_(2).27.Silica-rich minerals,such as quartz,are abundant in the coal-bearing strata while the enrichment of trace elements varies greatly.The coal-bearing strata in the Bijie area,Guizhou,are rich in race elements such as Li,Cu,Ga,Nb,and U,while those in the Liupanshui area are slightly enriched in elements such as V,Co,Cu,Se,Zr,La,Ce,Sm,Eu,and Tb.The coal-bearing strata in the Fuyuan area,Yunnan,arerich in Se and slightly enriched in trace elements such as Th,Cr,and Pb,with Hg content within the normal range,while those inthe Luoping area are slightly enriched in elements such as Co,Cu,Zr,Nb,and Ta.The enrichment of trace elements in the coal are mainly influenced by the input of Emeishan basaltic detritus from the western Kangdian ancient land and the action of seawater during the coal formation period.

关 键 词：含煤岩系 晚二叠世 伴生元素 富集特征 滇东、黔西 云南、贵州 

分 类 号：TE132[石油与天然气工程—油气勘探]