贵州铜仁地区下寒武统牛蹄塘组黑色岩系地球化学特征  

Geochemical characteristics of the black rock series of Niuditang Formationof the Lower Cambrian in Tongren area of Guizhou

作　　者：鲍淼[1] 林权富 韩家家 张继银[1] 刘刚 BAO Miao;LIN Quanfu;HAN Jiajia;ZHANG Jiyin;LIU Gang(Geological Team No.112,Guizhou Province Bureau of Geology and Mineral Exploration and Development,Anshun 561000,Guizhou,China)

机构地区：[1]贵州省地质矿产勘查开发局一一二地质大队,贵州安顺561000

出　　处：《矿产与地质》2020年第1期48-55,共8页Mineral Resources and Geology

基　　金：贵州省地质矿产勘查开发局地质科研项目“贵州省地热深井储层保护钻井液研究”(黔地矿科合〔2018〕20号)资助。

摘　　要：通过对研究区寒武系底部黑色岩系中微量元素和稀土元素研究分析,认为研究区黑色岩系属于开阔盆地和大陆边缘之间靠近陆地区域的还原环境条件下形成的,黑色岩系为热水沉积成因;区内找钒矿的可能性更大,找钼、镍矿的可能性较小。在亲铁元素中,Co、Ni、Mo元素相对富集,Mo富集程度最大,浓集系数达378.82;在亲铜元素中,Zn、Sb元素较富集,Zn元素浓集系数在0.18~17.25之间,Sb元素浓集系数在3.36~69.11之间;在亲石元素中,Ba、W、U三个元素较富集,Ba元素浓集系数在1.90~28.07之间,W元素浓集系数在130.1~387.40之间,U元素浓集系数在5.91~74.11之间,W元素富集程度最高,其浓集系数最大值达387.40,具有深入研究的意义。Based on the study and analysis of trace and rare earth elements in the black rock series at the bottom of the Cambrian system in the study area,it is considered that the black rock series in the study area are formed under the reducing environment condition close to the continental area between the open basin and the continental margin.The black rock series belong to the hot water sedimentary genesis.There is a greater possibility for V mineral resources exploration in the area,and a less possibility for Mo and Ni mineral resources exploration among the ferriphile elements.Co、Ni and Mo elements are relatively enriched,of which Mo element is the most abundant,and the concentration coefficient reaches up to 378.82.Zn and Sb are relatively enriched among the chalcophile elements,and the concentration coefficient of Zn ranges from 0.18 to 17.25 and that of Sb ranges from 3.36 to 69.11.Among the lithophile elements,Ba,W and U are relatively enriched,while the concentration coefficient of Ba ranges from 1.90 to 28.07,and those of W,U range from 130.1 to 387.40 and from 5.91 to 74.11,respectively.Among them,the concentration coefficient of W is the greatest,and its maximum is 387.40,so there is a great significance for the further study.

关 键 词：黑色岩系 地球化学特征 寒武系 牛蹄塘组 铜仁地区 贵州 

分 类 号：P595[天文地球—地球化学] P534.41[天文地球—地质学]