广东石寨矽卡岩型银铅锌矿床控矿条件与成因分析  

Ore-controlling conditions and genetic analysis of the skarn type Shizhai Ag-Pb-Zn Deposit in Guangdong Province

作　　者：傅良刚[1] 南争路 冼源宏 

机构地区：[1]中国人民武装警察部队黄金第九支队

出　　处：《黄金》2015年第9期19-23,共5页Gold

基　　金：中国地质调查局项目(12120114083701)

摘　　要：南岭成矿带粤北地区广泛发育燕山期中酸性花岗岩,易形成富含W、Sn、Pb、Zn等有色金属矿产。石寨银铅锌矿床是一个矽卡岩型多金属矿床,研究其控矿条件,分析其成因旨在总结区域成矿规律,为该类与矽卡岩有关的找矿工作提供借鉴。从岩浆岩、构造、围岩等控矿条件入手,分析其成因,最终认为燕山四期中酸性花岗岩——中细粒黑云母花岗岩岩浆演化充分,分异程度高、矿化富集好;成矿流体与碳酸盐岩地层接触发生渗透、扩散交代作用,在接触带构造外带形成银铅锌多金属矿床,成因类型为接触交代矽卡型矿床。Yanshanian medium acidity granite develops widely in the northern Guangdong part of Nanling Metallogenic Belt,which makes it easy to form W,Sn,Pb,Zn and other nonferrous metallic minerals. Shizhai Ag-Pb-Zn Deposit is a typical skarn type polymetallic deposit. Study on its ore-controlling conditions and analysis of its genesis are aimed at concluding the regional mineralization regularities and thus providing references for the prospecting of such skarn-related deposits. The genesis is analyzed based on the tectonics,magmatic rocks and surrounding rocks and the fourth Yanshanian medium acidity granite is determined—medium-fine biotite granite magmatic rocks fully evolved with high degree differentiation and good mineralization and enrichment; the ore-forming fluids contacted the carbonate strata where the permeation and diffusive metasomatism occurred,making Ag-Pb-Zn skarn rock type polymetallic deposits form in outer tectonic belt of the contact zone. The genetic type is hydrothermal contact metasomatic skarn deposit.

关 键 词：控矿条件 矽卡岩型矿床 石寨银铅锌矿床 广东省 

分 类 号：TD11[矿业工程—矿山地质测量] P618.4[天文地球—矿床学]