蒙自白牛厂银多金属矿床的成因研究  

ON THE GENESIS DOF THE BAINIUCHANG AG POLYMETALLIC DEPOSIT IN MENGZI

作　　者：高子英[1] 

机构地区：[1]云南省地质科学研究所

出　　处：《云南地质》1996年第1期91-102,共12页Yunnan Geology

基　　金：云南省科委应用基础研究项目

摘　　要：白牛厂矿床为由花岗岩浆提供热源、部分成矿流体及部分成矿元素，主要由Ｚ—及Ｄ１等地层提供成矿元素，古大气降水的深循环及构造运动对成矿起了重要作用的叠生矿床。由于燕山期构造作用和先期构造的活化，致使燕山期上侵岩浆压力降低，岩浆内部物理化学失衡，发生液态分离（熔离），分离出的含矿热液与大气降水一起，对岩体周围的Ｚ—　及Ｄ１合矿地层进行萃取，形成了大量含矿流体，在断裂、裂隙、层间破碎带等空间多次充填、交代成矿，形成了以Ｖ１矿体为主体的大型银多金属矿床。赋矿地层主要是　２ｔ和　２ｌ。The Bainiuchang ore deposit is formed by a superimposed metallogenesis,including the important factors of heat,a part of metallogenetic fluid and elements from granite magma; metallogenetic elements mainly from Z-∈ and D1 strata;deep cycle of the palaeoatmospheric precipitation and structural movement.The Yanshanian structural action and the activiation of earlier structure cause the pressure of Yanshanian uptrusion magma to decrease,physical and chemical state in magma to be uneven and liquid separation(immiscible separation)to take place.The ore hydrothermal solution by separation and the atmospheric precipitation extract metallogenetic elements from the ore strata Z-∈ and D1 around the rock body,form a large amount of ore fluid,repeatedly filling and causing metasomatic metallogenesis in fault,fissure and interlayer fracture zone, forming the large type Ag polymetallic deposit with the main ore body V1.The ore bodies are mainly occurred in ∈2t and ∈ 21.

关 键 词：银 多金属矿床 成因 成矿流体 

分 类 号：P618.201[天文地球—矿床学] P618.520.1[天文地球—地质学]