投稿时间：2011-03-14
修订日期：2011-10-29
中文摘要:山西省繁峙县义兴寨金矿为一大型石英脉型矿床。对义兴寨矿区金矿石中的流体包裹体进行了岩相学和显微测温研究,结果表明:义兴寨金矿各成矿阶段金矿石中的流体包裹体主要为气液两相的H2O包裹体,其次为纯气相H2O包裹体和含CO2包裹体。激光拉曼探针分析表明,第Ⅰ阶段流体包裹体除SO2特征峰外,还出现了CO2特征峰和C6H6特征峰,第Ⅱ阶段石英中流体包裹体的气相成分伴有一定量的SO2。第Ⅰ阶段包裹体的完全均一温度(均一至液相)为149~384℃,第Ⅱ阶段包裹体的完全均一温度(均一至液相或气相)为151~373℃,富气相包裹体多数在达到均一前发生爆裂,第Ⅲ阶段包裹体的完全均一温度(均一至液相)为246~325℃,第Ⅳ阶段包裹体的完全均一温度(均一至液相)为223~269℃。成矿流体为中温、低盐度的浆控热液,主成矿期发生流体沸腾并在第Ⅱ阶段有不同来源流体混入,后期有大气降水的加入。早期成矿阶段的流体具有深部地壳甚至地幔的特征。
Abstract:The Yixingzhai gold deposit is a large-size quartz-vein type ore deposit. The ore microscopy and measured temperature data of fluid inclusions reveal that inclusions at various ore-forming stages of the Yixingzhai gold deposits are mainly gas-liquid two-phase (H2O or H2O-CO2) inclusions and subordinately pure volatile inclusions. Raman analysis of the fluid inclusions indicates that, in the gaseous phase, SO2, CO2 and C6H6 are existent at ore-forming stage Ⅰ, and SO2 is existent at stageⅡ in addition to water vapor. The homogenization temperatures of ore-forming stage Ⅰare 149~384℃ (homogenization to liquid), and those of stage Ⅱare 151~373℃ (homogenization to liquid or gas). Volatile-rich fluid inclusions are mostly decrepitated before homogenization. The homogenization temperatures of stage Ⅲ are 246~325℃ (homogenization to liquid), and those of stage Ⅳare 223~269℃ (homogenization to liquid). The ore-forming fluids are of the epithermal-mesothermal and low salinity hypothermal system. The ore-forming fluids boiled very impetuously at the main stage, the meteoric water participated the activity during the late stage, and the ore-forming fluids were mixed with other fluids from different sources at stage Ⅱ. The reducibility of the early ore-forming stage fluid came from continental deep crust or the mantle.
文章编号：
中图分类号：P618.51
文献标志码：
基金项目:本文得到全国危机矿山接替资源勘查项目(20089925)和国家自然科学基金项目(批准号41172302)的资助
引用文本：
路英川,葛良胜,申维,王治华,郭晓东,王梁,周传芳.2012.山西省义兴寨金矿流体包裹体特征及其地质意义[J].矿床地质,31(1):83~93LU YingChuan,GE LiangSheng,SHENG Wei,WANG ZhiHua,GUO XiaoDong,WANG Liang,ZHOU ChuanFang.2012.Characteristics of fluid inclusions of Yixingzhai gold deposit in Shanxi Province and their geological significance[J].Mineral Deposits31(1):83~93
图/表
