皖南金家山金矿地质地球化学特征及找矿方法  

Geological and geochemical characteristics and prospecting method in the Jinjiashan gold deposit of southern Anhui

作　　者：章贤能[1] Zhang Xianneng(No.332 Geological Team,Bureau of Geology and Mineral Exploration of Anhui Province,Huangshan 245000,Anhui,China)

机构地区：[1]安徽省地质矿产勘查局332地质队,安徽黄山245000

出　　处：《地质学刊》2021年第3期240-246,共7页Journal of Geology

基　　金：安徽省地质勘查基金项目“安徽省祁门县金家山金矿普查”(2018-1-Ⅱ)。

摘　　要：金家山金矿位于江南隆起带北缘,赋存于新元古代浅变质浊积岩基底岩层中,其成矿结构面为张性或扭张性断层,成矿地质体为角砾岩。矿石工业类型为角砾岩型金矿,矿石矿物主要为毒砂、黄铁矿,少量黄铜矿、闪锌矿、方铅矿、褐铁矿、自然金,矿石结构主要为半自形晶粒状结构、他形粒状结构,矿石构造以浸染状构造为主。通过地球化学工作有效圈出矿致异常,研究区Au元素属显著富集、强烈变异、极强叠加型元素,说明该区地质体遭受的后期各种构造作用叠加对金矿成矿有利,初步认为地球化学配合地质测量和探矿工程可快速找金。The Jinjiashan gold deposit is located in the northern margin of the Jiangnan uplift belt,occurs in the shallow metamorphic turbidite of Neoproterozoic basement rock and is controlled by extensional fault or torsional extensional fault.The ore-forming geological body is tectonic breccia.Its industrial types of ore bodies are breccia type gold ore.Ore minerals are mainly arsenopyrite,pyrite and a small amount of chalcopyrite,sphalerite,galena,limonite and nature gold.The textures are mainly hypidiomorphic granular texture and allotriomorphic granular texture.The major structure is disseminate structure.According to the geochemical work,the Au element in the study area is significantly enriched,strongly variable and strongly superimposed,indicating that the geological body in this area suffered from various tectonic superposition in the later period,which is beneficial to gold mineralization.It is preliminarily believed that the combination of geochemistry with geological survey and prospecting engineering can quickly find gold.

关 键 词：金矿 浊积岩 断层 江南隆起带 安徽金家山 

分 类 号：P622.3[天文地球—地质矿产勘探] P618.51[天文地球—地质学]