辽东庄河金矿同位素地球化学特征及成矿时代  

The Isotope Geochemical Characteristics and Ore-forming Time of Zhuanghe Gold Deposit,Eastern Liaoning

作　　者：郭大招[1] 魏俊浩[1] 张可清[1] 谭文娟[1] 谭俊[1] 李闫华[1] 

机构地区：[1]中国地质大学,武汉430074

出　　处：《地质学报》2005年第5期671-678,共8页Acta Geologica Sinica

基　　金：教育部博士点基金资助项目(编号20040491502)的成果。

摘　　要：到目前为止,对辽宁庄河金矿尚没有做过系统的矿床地球化学和同位素年代学的研究。本文在成矿地质条件分析的基础上,对庄河金矿床的氢、氧同位素、硫同位素、铅同位素、碳同位素以及Rb-Sr同位素的组成特征进行了分析研究。氢、氧同位素组成表明成矿流体主要来源于岩浆热液,并与围岩发生了同位素交换;硫同位素和碳同位素组成表明成矿物质主要来源于地壳深部;矿石和花岗斑岩脉具有非常相似的铅同位素组成,暗示该矿床的形成和物质来源与此岩浆活动有密切的成因联系;石英流体包裹体Rb-Sr等时线年龄为143.0±5.8Ma,表明金的成矿期为燕山期。Up to now, there are no systematic geochemical studies and isotopic age for the Zhuanghe gold deposit, eastern Liaoning. Based on the metallogenic geological settings ,this paper analyzes the compositive characters of the H, O, S, Pb, C and Rb-Sr isotopes. The composition of H and O isotopes indicate that the ore-forming fluids mainly come from the magmatic hydrotherm and take place isotope exchange with wall rocks. The S and C isotopes present the ore-forming materials are derived from the deep crust. Both the ores and the granite porphyry veins nearly have the same Pb isotope composition ,indicating the formation of the deposit and the oreforming materials have the close genetic relation with this magmatic action. The Rb-Sr isochronous ages from the fluid inclusions in quartz are about 143.0±5.8Ma,indicating the gold mineralization is in the Yanshanian.

关 键 词：同位素 地球化学 成矿时代 庄河金矿 辽宁 同位素地球化学特征 金矿床 庄河 RB-SR等时线年龄 RB-SR同位素 

分 类 号：P618.51[天文地球—矿床学]