江西茅排金矿床的地球化学特征  

GEOCHEMISTRY CHARACTERISTICS OF THE MAOPAI GOLD DEPOSIT IN JIANGXI PROVINCE,CHINA

作　　者：赖绍聪[1] 徐海江[1] 

机构地区：[1]西北大学,河北地质学院

出　　处：《地质找矿论丛》1995年第4期48-59,共12页Contributions to Geology and Mineral Resources Research

摘　　要：本文讨论了江西茅排金矿床金的地球化学分布，矿床微量元素及稳定同位素地球化学特征。表明茅排金矿床围岩─震旦系周潭群变质岩在区域上为一富金层位，而在矿区附近却存在一金元素亏损带，金矿床成矿物质应主要来自于周围的变质岩围岩。茅排金矿床是在周潭群富金层位基础上，经过混合岩化及剪切带作用富集成矿，并经历了燕山期构造─岩浆活动对金矿化的叠加富集。This paper deals with the gold abundance and the distribution patterns in metamorphic rocks and soil of Maopai area. Trace elements, isotope characteristics of hydrogen, oxygen and sulphur in the Maopai gold deposit are also studied. The results show that there is a Au deplated belt in the Zhoutan group metamorphic rocks in Maopai area. That is to say, ore-forming element of the Maopai gold deposit comes from host rock-Zhoutan group metamorphic rocks. And the gold min eralization is related to quartz veins and metal sulfides. The results of hydrogen and oxygen isotopes calculation ratio show:δ SDH2O =- 60.49～- 71.68‰, δ18OH2O= 9.733～ 18. 963‰.In the diagram of δDH2O-δ18OH2O, the values are between magma water and metamorphic water. The Character of hydrogen and oxygen isotopes in Maopai gold deposit is different from those of Hetai, Linlong and Jiapigou. The sourse of ore-forming fluid in Maopai area is rather complex. One is related to metamorphic hydrothermal. Others perhaps seriously concern with magmatic hydrothermalism.

关 键 词：金矿床 微量元素 同位素 地球化学 

分 类 号：P618.510.4[天文地球—矿床学]