四川省梭罗沟金矿床与日拉金矿床辉锑矿地质特征对比研究  

Comparative study on the geological characteristics of stibnite from Suoluogou Gold Deposit and Rila Gold Deposit in Sichuan Province

作　　者：林鑫[1,2] 张文林 赵波[1,2] 文怀忠 罗巍 魏永峰 周福篯[1,2] Lin Xin;Zhang Wenlin;Zhao Bo;Wen Huaizhong;Luo Wei;Wei Yongfeng;Zhou Fujian(Regional Geological Survey Brigade of Sichuan Bureau of Geology;Sichuan Rongda Mining Group Co.,Ltd.;Sichuan Rongda Gold Co.,Ltd.)

机构地区：[1]四川省地质矿产勘查开发局区域地质调查队 [2]四川省容大矿业集团有限公司 [3]四川容大黄金股份有限公司

出　　处：《黄金》2023年第11期76-82,共7页Gold

基　　金：四川省地质矿产勘查开发局区域地质调查队科研基金项目(川地矿区调科字〔2021〕15号);四川省地质矿产勘查开发局地勘基金项目(川地矿发〔2004〕67号);四川省地勘基金项目(DZ202203)。

摘　　要：梭罗沟金矿床作为目前甘孜-理塘金矿带上已查明的最大金矿床,辉锑矿是该矿床的伴生矿物之一,一直未开展相关研究工作。在详细调查研究辉锑矿野外地质特征的基础上,通过岩相学、矿相学观察,对梭罗沟金矿床、日拉金矿床辉锑矿单矿物进行含金性测试及原位LA-MC-ICP-MS分析,发现在矿段品位相近的情况下,梭罗沟金矿床辉锑矿含金性高于日拉金矿床,黄铁矿仍为主要载金矿物,成矿物质来源为高度均一的壳源变质热液。结合区域上其他矿床硫同位素特征,认为甘孜-理塘金矿带大部分矿床的成矿热液主要来源于变质热液。元素相关性分析显示,As、Cu、Hg、Ag、Pb、Zn、Cr等元素与Au具有正相关性,除Au、As、Sb元素外,Cu元素也可以作为该区域地球化学找矿的特征元素。Suoluogou Gold Deposit is the largest gold deposit identified in the Ganzi-Litang gold belt.Stibnite is one of the associated minerals of the deposit,and no relevant research work has been carried out.Based on a detailed investigation of the field geological characteristics of the stibnite,this study conducted a gold content test and in-situ LA-MC-ICP-MS analysis of the single mineral of stibnite in the Suoluogou Gold Deposit and Rila Gold Deposit through petrographic and mineralogical observations.It was found that with similar ore section grades,the gold content of Suoluogou Gold Deposit is higher than that of Rila Gold Deposit,and pyrite is still the main gold-bearing mineral.The ore-forming materials are derived from highly homogeneous crust-derived metamorphic hydrothermal fluids.Based on the sulfur isotope characteristics of other deposits in the region,it is believed that most ore-forming hydrothermal fluids in the Ganzi-Litang gold belt mainly come from metamorphic hydrothermal fluids.The element correlation analy-sis found that As,Cu,Hg,Ag,Pb,Zn,Cr,and other elements has a positive correlation with Au.In addition to Au,As,and Sb elements,Cu can also be used as a feature element for geochemical prospecting in the region.

关 键 词：物质来源 梭罗沟金矿床 日拉金矿床 辉锑矿 地球化学 硫同位素 

分 类 号：TD11[矿业工程—矿山地质测量] P618.51[天文地球—矿床学]