摘要
根据区域地质。区域化探资料,通过黔西南地区基性玄武岩浆活动、沉积相区分布、地层和岩性、构造等控矿地质、地球化学条件,以及其相应的元素组合、分布特点的时、空对比分析,认为黔西南微细浸染型金矿是由区内火山作用、沉积相区沉积作用、构造及地下水热液作用等综合性、继承性、阶段性地质作用演化形成。成矿过程可能为火山活动提供区内金矿的最初物质来源;经过特殊沉积相分异沉积成岩阶段的初步金富集,分别形成了陆源碎屑沉积矿源层(P_(1-2)、碳酸盐岩—粘土岩沉积矿源层(P_2—T_1)及浊流碎屑沉积矿源层(T_(1-2))等,并伴有与火山活动有关的元素组合,最后,由构造或地下水热液活动再富集金形成了黔西南分布广泛的金矿床。
On the basis of the data of regional geology and regional geochemical exploration and through time-space contrast analyses of ore-controlling geological and geochemical conditions like magma activities of basic basalt in southwestern Guizhou, distribution of sedimentary facies, strata and lithology, and structures, etc. , as well as their corresponding element combinations and distribution features, the writer thinks that the fine infection Au deposits in southwestern Guizhou were formed by comprehensive, successive and stage geological functions like volcanism, deposition of sedimentary facies areas, structure and underground water hydrothermal process, etc. within the district. The mineralization may have provided the initial material sources for the Au deposits in this region. Through preliminary Au-enriching in the differential sedimentary rock-forming stage of special sedimentary facies, epicontinent clastic deposit ore source beds (P), carbonatite clay rock deposit ore source beds (P2-T2) and tubidity current clastic deposit ore source beds (T1-2), etc. were respectively formed and associated with the element combinations related to volcanic activities. Then the Au enrichment was again made by structure or underground water hydrothermal activity and the Au deposits distributed widely in southwestern Guizhou were at last formed.
出处
《贵州地质》
1992年第2期150-160,共11页
Guizhou Geology
