江西万载兴源冲铜矿流体包裹体地球化学研究

摘要

万载兴源冲铜矿地处宜丰–景德镇板缘深断裂带西段黄茅地区。本文在前人研究基础上,通过对不同矿体矿石中的石英、方解石等脉石矿物进行系统的流体包裹体测温工作,来探讨矿区成矿流体来源。流体包裹体测温得出包裹体均一温度在75℃~440℃之间,主要分布于两个温度区间:110℃~190℃和210℃~290℃,显示中低温的特征;盐度变化范围在1.74 wt%~22.58 wt%之间,显示中高盐度的特征。根据均一温度–盐度图可以看出矿床成矿流体大致以海底喷流热液和与成岩作用有关的水为主,也有小部分岩浆热液的混合。 Xingyuanchong copper deposit at Wanzai is located in the west section of Yifeng-Jingdezhen deep faults—Huangmao. On the basis of previous researches, and by carrying out temperature measurement of fluid inclusions systematically on gangue minerals, such as quartz and calcite, the authors discussed the sources of metallogenic fluids. The results show that 1) the homogenization temperatures of fluid inclusions vary in the range of 75?C~440?C, mainly in two sections: 110?C~ 190?C and 210?C~290?C, showing the feature of low medium temperatures; 2) the salinity ranges from 1.74 wt% to 22.58 wt%, suggesting medium high salinity. The homogenization temperature- salinity figure indicates the metallogeinic fluids are mainly submarine extrusive hydrothermal fluids and fluids related with diagenesis, and a small part of magmatic fluids.