双鸭山七星河金矿矽卡岩中金矿化地质特征、成矿规律及矿床成因探讨  

Geological Characteristics,Au-mineralization,and Metallogenesis of the Qixinghe Gold Deposit,Shuangyashan,Jilin

作　　者：林洪勇 

机构地区：[1]双鸭山七星河矿业有限公司,吉林双鸭山155100

出　　处：《黄金科学技术》2008年第3期26-29,共4页Gold Science and Technology

摘　　要：位于佳木斯地块中部的双鸭山金矿是一个典型的矽卡岩型金矿。勘探、开采过程中的地质调查结果表明,矿体分布强烈受矽卡岩化及NW向破碎带共同控制。岩石微金分析结果显示,金矿源自混合岩化、基性火山岩。携带金络合物的混合流体沿断裂带迁移,与碳酸盐岩地层反应,使地层矽卡岩化,矽卡岩化过程使流体酸度下降,金络合物分解,金元素沉淀形成金矿。矿石矿物分析结果表明,金矿的主要赋矿矿物为毒砂,次为其他硫化物。据此推测,成矿流体中的络阴离子可能为[AsS3]3-。Locating in the center of the Jiamusi block, the Shuanyashan gold mine is a typical skarn deposit. Geologic data from exploration and mining demonstrated that the distribution of deposit bodies is strongly controlled by skarnization and fracturing. Gold-content analyses of the country rocks indicated that the gold element resourced from migmatization of basic-andesitic volcanic rocks. The migmatic fluid, which contained higher Au-complex-compound, flows along fractures or bedding faces. When contacted with carbonatite, skarnization occurred decreasing the pH value of the Au-bearing fluid, leading the gold depositing from the Au-complex. The major Au-bearing mineral is Arsenopyrite （FeAsS） with minor other sulfides, suggesting the complex anion of the Au-complex may be [ AsS3 ]^3- .

关 键 词：矽卡岩 金矿 混合流体 砷硫络阴离子 佳木斯地块 

分 类 号：P618.51[天文地球—矿床学]