贵州遵义黄家湾下寒武统牛蹄塘组镍-钼富集层电子探针研究  

EMPA RESEARCH ON NICKEL AND MOLYBDENUM MINERALS IN Ni-Mo SULFIDE LAYER OF THE LOWER CAMBRIAN BLACK ROCK SERIES AT HUANGJIAWAN,ZUNYI,GUIZHOU PROVINCE

作　　者：畅斌[1,2] 温汉捷[1] 

机构地区：[1]中国科学院地球化学研究所矿床地球化学国家重点实验室,贵州贵阳550002 [2]中国科学院研究生院,北京100049

出　　处：《矿物学报》2008年第4期439-446,共8页Acta Mineralogica Sinica

基　　金：中国科学院‘西部之光’项目;中国科学院创新奖励项目;贵州省自然科学基金

摘　　要：对贵州遵义黄家湾下寒武统牛蹄塘组镍-钼富集层进行电子探针研究,发现镍主要赋存于黄铁矿、针镍矿、辉砷镍矿、铁辉砷镍矿、紫硫镍矿、赫硫镍矿;钼主要以"碳硫钼矿"的形式存在。镍钼硫化物多与黄铁矿、白铁矿交代共生,反映矿物经历了不同的成矿阶段。岩石中不仅富集Ni、Mo元素,而且Se元素存在超常富集,可以视为热液作用或生物作用的结果。遵义黄家湾下寒武统Ni-Mo富集层应为海底热液沉积和生物沉积混合成因,其物源较为复杂。In this study, several minerals such as pyrite, vaesite, gersdorffite, Fe-bearing gersdorffite, violarite and heazlewoodite; and a C-Mo-smixed-layer phase （MoSC） have been detected from the Ni-Mo ores at Huangjiawan, Zunyi, Guizhou Province, on the basis of electron microprobe analyses. Ni occurs mainly in Ni-minerals mentioned above. Mo occurs as MoSC. Se is distributed almost in the whole Ni-Mo sulfide layer with higher contents in the Ni- Mo-rich strata of the Lower Cambrian Niutitang Formation. The present study indicates that the origin of Ni-Mo sulfide layer is related to sea-floor hydrothermal exhalation and biological accumulation.

关 键 词：镍-钼富集层 电子探针 下寒武统 黑色页岩 遵义 

分 类 号：P534.41[天文地球—古生物学与地层学] P536[天文地球—地质学]