黔西北垭都-蠎硐断裂带铅锌多金属矿研究现状及进展综述

黔西北垭都-蠎硐断裂带为中国西南大面积低温成矿域的一个重要单元。断裂带分布众多铅锌矿床(点),矿床类型独特,区别于MVT型、VMS型及SEDEX型。笔者通过分析研究区铅锌矿床地质构造特征及Pb、Sr、S、REE等同位素-稀土地球化学特征认为:铅锌等金属成矿物质来源于基底,硫元素来源于上覆赋矿地层。铅锌矿床的成矿时代集中于200Ma^225Ma,为晚印支期,即铅锌矿的形成为峨眉山玄武岩喷发-喷溢事件晚期或者之后的成矿事件。研究区铅锌矿的成矿系统:受地幔柱及构造作用的影响,起源于基底的流体不断萃取基底变质火山岩中的铅锌等金属元素形成含矿流体,含矿流体被构造导入沉积地层后进行大规模运移,运移至蒸发岩层于构造的破坏空间卸载形成铅锌矿床。

Research status and progress in the study of lead-zinc polymetallic deposits in the northwestern guizhou province

The fault zone of northwest guizhou is an important unit in epithermal mineralization area in southwest China.A large number of lead-zinc deposits(points)of this fault zone,The unique deposit types are distinct from MVT,VMS and SEDEX.Through analyzed the geological features and Pb,Sr,S isotopic,REE rare earth geochemical characteristics,The author thinks that:Metallogenic materials such as lead and zinc are derived from the basement,The sulfur element is derived from the overlying strata.The metallogenic epoch of lead-zinc deposit is late indosinian(200Ma^225Ma).The metallogenic events of lead-zinc deposits is the late of emeishan basalt.The metallogenic system of lead-zinc deposit in the research area:Influenced by mantle plume and tectonic action,The fluid that originated from the base is constantly extracting the metallic elements such as lead and zinc in basement metamorphic volcanic rocks,The ore-bearing fluid is transported on a large scale after being constructed into sedimentary strata,Lead-zinc deposit is formed in structural damage space and evaporating rock formations.