豫西马超营断裂东段草店金矿床流体包裹体特征及成因分析  

Fluid inclusion characteristics and genesis study of Caodian gold deposit in the east section of Machaoying fault zone

作　　者：刘宗彦 孙保花 王振强 丁培超 王博文 沈瑞峰 王鹏飞 LIU Zongyan;SUN Baohua;WANG Zhenqiang;DING Peichao;WANG Bowen;SHEN Ruifeng;WANG Pengfei(The First Institute of Geological and Mineral Resources Survey,Henan Bureau of Geo-Exploration&Mineral Development,Luoyang 471023,Henan,China;Key Laboratory of Gold and Silver Polymetallic Ore-forming Series and Deep Prediction of Henan,Luoyang 471023,Henan,China;Key Laboratory of Precious Metal Analysis and Exploration Technology of Ministry of Natural Resources,Luoyang 471023,Henan,China;The First Geological Exploration Institute,Henan Bureau of Geo-Exploration&Mineral Development,Zhengzhou 450001,Henan,China)

机构地区：[1]河南省地质矿产勘查开发局第一地质矿产调查院,河南洛阳471023 [2]河南省金银多金属成矿系列与深部预测重点实验室,河南洛阳471023 [3]自然资源部贵金属分析与勘查技术重点实验室,河南洛阳471023 [4]河南省地质矿产勘查开发局第一地质勘查院,河南郑州450001

出　　处：《矿产与地质》2020年第6期1094-1103,共10页Mineral Resources and Geology

基　　金：河南省地矿局科研攻关项目“马超营断裂东段找矿远景分析与找矿预测研究”(豫地矿科研〔2016〕04号)资助。

摘　　要：草店金矿位于河南省鲁山县县城西南约10 km,为构造蚀变岩型金矿床。矿床形成经历了多阶段的热液成矿作用,可划分为黄铁矿-石英→石英-黄铁矿→石英-黄铁矿、黄铜矿、方铅矿多金属硫化物→石英-碳酸盐等热液成矿作用阶段。通过流体包裹体测温,显示草店金矿主成矿阶段温度介于210℃~249℃之间,流体盐度为4%~9%,属于中温、低盐度热液型金矿。流体包裹体中氢氧同位素组成表现出明显的幔源与大气降水混合特征,随着成矿流体由早至晚的演化,其中大气降水的比例呈明显增加趋势。Caodian gold deposit is located at about 10 km southwest of Lushan County of Henan Province,which belongs to the structural alteration-rock-type gold deposit.The deposit formation has undergone multistage in the metallogenic process,which can be divided into several hydrothermal stages,pyrite-quartz stage→quartz-pyrite stage→quartz-pyrite-chalcopyrite-galena polymetallic sulfide stage→quartz-carbonate stage.According to the temperature feature of fluid inclusions,it is shown that the main metallogenic stage temperature of Caodian gold deposit is between 210℃and 249℃,and the fluid salinity is from 4%to 9%.It is indicated that Caodian gold deposit belongs to the hydrothermal gold deposit of middle temperature and low salinity.Hydrogen and oxygen isotope composition of the fluid inclusion shows the obvious mixing characteristics of mantle source and atmospheric precipitation.With the evolution of ore-forming fluid from the early to late periods,the proportion of atmospheric precipitation in the fluid increases obviously.

关 键 词：草店金矿 流体包裹体 同位素 矿床成因 马超营断裂带 豫西 

分 类 号：P618.51[天文地球—矿床学] P597[天文地球—地质学]