滇东南南当厂银多金属矿床银的赋存状态  

The occurrence state of Ag in the Nandangchang Ag-polymetallic deposit in the southeastern Yunnan

作　　者：贾泽晨 任涛[1] 黄建国[1] 管申进 JIA Zechen;REN Tao;HUANG Jianguo;GUAN Shenjin(Faculty of Land Resources Engineering,Kunming University of Science and Technology,Kunming Yunnan 650093,China)

机构地区：[1]昆明理工大学国土资源工程学院,云南昆明650093

出　　处：《矿物学报》2024年第6期825-834,共10页Acta Mineralogica Sinica

基　　金：国家自然科学基金(编号:42163005)。

摘　　要：南当厂银铅锌矿床位于滇东南老君山矿集区的西南部,矿体主要呈脉状分布于F1断裂构造带中。在该矿床中发现了硫银锡矿、硫铜银矿、硫锑铜银矿、辉银矿和深红银矿五种独立银矿物。方铅矿是该矿床主要载银矿物,方铅矿中银的含量为203×10^(–6)~8460×10^(–6),锑的含量为2.43×10^(–6)~1165×10^(–6),铋的含量为0.04×10^(–6)~18479×10^(–6)。Ag以Ag++(Bi,Sb)^(3+)↔2Pb^(2+)类质同象替代机制进入方铅矿中。综合南当厂银多金属矿床的地质地球化学特征,本研究初步认为该矿床为中硫型浅成低温热液型银矿床。The Nandangchang silver-lead-zinc deposit is located in the southwestern part of the Laojunshan ore-concentrated area in the southeastern Yunnan.The veining orebodies are mainly distributed in the F1 faulting structural belt.Five kinds of independent silver minerals are identified in this deposit.They include canfieldite,stromeyerite,polybasite,argentite and pyrargyrite.Galena is the main silver-bearing mineral in this deposit,with silver,antimony and bismuth concentrations varying from 203×10^(–6)to 8460×10^(–6),from 2.43×10^(–6)to 1165×10^(–6),and from 0.04×10^(–6)to 18479×10^(–6),respectively.Ag was incorporated into the lattice of galena by coupled substitution of Ag++(Bi,Sb)^(3+)↔2Pb^(2+).Based on the comprehensive analysis of geological and geochemical characteristics of the Nandangchang Ag-polymetallic deposit,it is preliminarily concluded that the deposit belongs to the intermediate-sulfidation epithermal silver deposit.

关 键 词：滇东南 南当厂 银矿床 类质同象 浅成低温热液 

分 类 号：P618.52[天文地球—矿床学]