特提斯域的密西西比河谷型(MVT)铅锌矿床  

Mississippi Valley-Type(MVT) Pb-Zn deposits in the Tethyan domain:A review

作　　者：宋玉财[1] 侯增谦[1] 刘英超[1] 张洪瑞[1] SONG Yucai;HOU Zengqian;LIU Yingchao;ZHANG Hongrui(Institute of Geology, CAGS, Beijing 100037, China)

机构地区：[1]中国地质科学院地质研究所,北京100037

出　　处：《中国地质》2017年第4期664-689,共26页Geology in China

基　　金：国家重点研发计划项目(2016YFC0600306);国家自然科学基金项目(41773043;41320104004;41773042;41772088);国土资源大调查项目(DD20160024-02)资助~~

摘　　要：特提斯域是全球最重要的密西西比河谷型(MVT)铅锌矿床富集区,矿床广泛地分布在陆-陆碰撞造山带两侧的陆块上,就位于碰撞形成的褶皱-逆冲带和前陆带内,成矿通常发生在碰撞挤压作用晚期或之后、区域处于走滑或伸展的阶段。矿床、矿体的就位与张性断裂密切相关,主要控矿因素有蒸发盐底辟构造、碳酸盐岩溶蚀垮塌构造、蒸发盐溶蚀垮塌构造、高孔隙度白云岩、含重晶石地层等。油气流体在许多矿床和矿集区出现,其主要通过与硫酸盐发生反应为铅锌成矿提供还原硫。陆-陆碰撞的大地构造环境、大量的蒸发盐、丰富的油气流体是特提斯域富集MVT矿床的重要原因,域内寻找MVT矿床的潜力巨大。The Tethyan domain hosts the world’s most abundant Mississippi Valley-Type(MVT)Pb-Zn deposits,which occur in fold-thrust belts and forelands on both sides of the continent-continent collisional zone through the whole Tethyan domain.Mineralization commonly took place when the ore districts were experiencing strike-slip or extensional deformation,which occurred after regional compression or during the late stage of a compressional deformation event.The main ore-controlling factors include extensional faults,evaporite diapir,carbonate dissolution and collapse,evaporite dissolution and collapse,porous dolostone,and barite-bearing strata.Records of hydrocarbon fluids are present in many Pb-Zn deposits and ore districts of the Tethyan domain.They reacted with(dissolved)sulfate to provide reduced sulfur for the ore formation.The generation of such abundant MVT Pb-Zn deposits in the Tethyan domain can be attributed to the continent-continent collisional tectonic setting,large amounts of evaporites,and plentiful hydrocarbon fluids.This study raises the exploration potential for MV TPb-Zn deposits in the Tethyan domain.

关 键 词：密西西比河谷型矿床 陆.陆碰撞 蒸发盐 油气流体 张性断裂 特提斯 

分 类 号：P618.4[天文地球—矿床学]