贵州岑巩寒武系底部钒矿地球化学特征及成因初探  

Geochemical characteristics and Preliminary Genesis Analysis of vanadium deposit in the base of Cambrian in Cengong, Guizhou

作　　者：李军 李士彬 管永胜 吴晓娟 LI Jun;LI Shi-bin;GUAN Yong-sheng;WU Xiao-juan(Natural Resources Survey and Planning Institute of Guizhou Province,Guiyang 550004)

机构地区：[1]贵州省自然资源勘测规划研究院,贵阳550004

出　　处：《世界有色金属》2022年第12期81-86,共6页World Nonferrous Metals

基　　金：《贵州省矿产资源勘查与开发利用模式研究》(贵州省2022年度公益性基础性地勘资金项目)。

摘　　要：黑色岩系的成矿性与含矿性研究一直被国内外学者所关注,近些年来,有的学者对岑巩钒矿区基本地质特征、成矿物质来源、形成环境及成因等方面开展了一定研究,但对地球化学特征、标志层粉砂岩与钒矿形成之间联系的研究较少。本文通过对目前最大的黑色岩系型岑巩钒矿床典型含矿剖面精细实测,展开岩石学、矿物学及元素地球化学系统研究,探讨矿床形成环境、成因和标志层与该区钒矿床成矿之间的关系。根据标志层地球化学、矿物学等特征,建立钒矿成矿机理为海底喷流作用提供成矿物质,而在深海盆地缺氧环境下,短暂陆源碎屑流进入缺氧盆地,带来的氧化环境下形成的富含粘土矿物的粉砂岩(标志层),其不仅使海底短暂充氧,而且粉砂岩中的水云母、绿泥石、磁铁矿、有机质等与海水中V发生交代、吸附作用,使钒富集成矿。The mineralization of Black-rock-series has been focused by scholars at home and abroad.Recent years,Meanwhile,the basic geological characteristics,mineralization material source,formation environment and genesis have been investigated in Cengong vanadium mining area.However,the geochemical characteristics and relationship between the vanadium ore formation and siltstone of the key bed in the Cengong vanadium depposit is lacking.According to the characteristics of the strata geochemistry and mineralogy,establish the vanadium ore metallogenetic mechanism,in which metallogenic material is provided from sea bed,and siltstone riched in clay minerals,which is formed in oxidation environment,flow into the anoxic basin as clastic.The clastic flow carried oxygen to the bottom of sea,meanwhile,the mica,clay,magnetite mineral and organic matter in siltstone,reacted with V in seawater by metasomatism and adsorption,forming the vanadium deposit.

关 键 词：贵州岑巩 钒矿 寒武系 黑色岩系 标志层 

分 类 号：P618.43[天文地球—矿床学]