老王寨金矿床同位素组成特征及其地质意义  

Isotope Compositions and their Geological Implications of Laowangzhai Gold Deposit

作　　者：邓碧平[1] 刘显凡[1] 卢秋霞[1] 赵甫峰[1] 

机构地区：[1]成都理工大学地球科学学院

出　　处：《金属矿山》2013年第7期109-112,117,共5页Metal Mine

基　　金：国家自然科学基金项目(编号:40773031);教育部博士点基金项目(编号:20105122110010;20115122110005);四川省教育厅自然科学重点项目(编号:12ZA006);成都理工大学矿物学岩石学矿床学国家重点(培育)学科建设项目(编号:SZD0407)

摘　　要：通过对老王寨金矿床岩矿石氢、氧、碳、硫同位素组成的研究表明,氢、氧同位素组成特征显示矿区成矿流体中的水是以岩浆水为主的混合水,碳同位素组成表现为幔源特点,硫同位素组成具有典型的幔源硫特征。综合研究表明,云南老王寨金矿床成矿流体主要源于深部地幔,在参与交代蚀变过程中,其性质由熔浆向热液过渡,同时引发壳幔物质混染而有利于成矿作用的进行。Through the study of H-O-C-S isotopic data for rock （mine） stones from Laowangzhai gold deposit, the characteristics of hydrogen-oxygen isotopic compositions indicated that water in ore-forming fluid is the mixed magmatic wa- ter. Both carbon and sulfur isotopic compositions have clearly mantle-derived characteristics. From what has been discussed above,the ore-forming fluids of Laowangzhai gold deposit mainly derives from deep mantle, and their properties are trans- formed from magma fluids to hydrothermal fluids in the course of metasomatism and alteration, which leads to crust-mantle mixing simultaneously to be in favor of mineralization.

关 键 词：H - O 同位素 C 同位素 S 同位素 深源成矿流体 老王寨金矿床 

分 类 号：P618.51[天文地球—矿床学]