论底苏铅锌矿床的“双源”沉积改造成矿模式  

“DOUBLE SOURCE” SEDIMENTARY TRANSFORMATION METALLOGENIC MODEL OF THE DISU LEAD ZINC DEPOSIT

作　　者：朱赖民[1] 栾世伟[1] 袁海华[1] 戚华文[1] 

机构地区：[1]中国科学院地球化学研究所矿床地球化学开放研究实验室,成都理工学院

出　　处：《矿床地质》1998年第1期82-90,共9页Mineral Deposits

基　　金：四川地矿局八五科研项目

摘　　要：底苏铅锌矿床是近年来发现的。该矿床具“双源”沉积改造特征。同生沉积成岩成矿阶段同时存在海底热水和正常海水沉积作用，形成热水沉积矿石及矿源层。大气降水热液改造成矿阶段，大气降水沿岩石裂隙下渗被加热并淋滤早期沉积矿石及矿源层中的Ｐｂ、Ｚｎ，使之以［ＰｂＣｌ０２］、［ＺｎＣｌ０２］迁移，当含矿热液运移至有利构造部位时，Ｐｂ、Ｚｎ络合物交代地层中的黄铁矿或被有机质还原而再沉淀成矿。本文在矿床地球化学研究基础上。The Disu ore deposit,one of the lead zinc deposits discovered in recent years,is characterized by “double source”sedimentary transformation.In the syndepositional diagenetic and ore forming stage there existed both submarine hot water deposition and normal seawater deposition,forming the hot water sedimentary ore and the source bed.During the meteoric water and hydrothermal transformation ore forming stage,the downward percolating meteoric water along fissures was heated and then leached lead and zinc from the early deposited ore and source bed,resulting in the migration of these elements in the form of (PbCl 0 2) and (ZnCl 0 2) .When ore bearing hydrothermal solution moved to the favorable structural and lithologic position,Pb Zn complexes replaced pyrite in strata or were reduced by organic matter,and eventually formed the ore deposit through reprecipitation.Based on geochemical studies,the present paper puts forward a metallogenic model for the Disu lead zinc deposit.

关 键 词：铅锌矿床 沉积改变 成矿模式 地球化学 

分 类 号：P618.420.5[天文地球—矿床学] P618.430.5[天文地球—地质学]