新疆西准噶尔宏远钼矿床和吐克吐克钼铜矿床流体包裹体特征及成矿时代  

Research on the fluid inclusion and Re-Os dating of Hongyuan(Cu) Mo deposit and Tuketuke Mo-Cu deposit,West Junggar,Xinjiang

作　　者：鄢瑜宏 申萍[1] 潘鸿迪[2] 王军年[3] 钟世华[1] 刘晓刚[3] 

机构地区：[1]中国科学院地质与地球物理研究所矿产资源研究重点实验室,北京100029 [2]长安大学地质科学与资源学院,西安710054 [3]新疆地质矿产勘查开发局第七地质大队,新疆乌苏833300

出　　处：《地质科学》2014年第1期287-304,共18页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：国家自然科学基金项目(编号:41272109;40972064);中国科学院知识创新工程项目(编号:KZCX-EW-LY02);科技支撑计划305项目(编号:2011BAB06B01)资助

摘　　要：宏远（铜）钼矿和吐克吐克钼铜矿为新疆西准噶尔地区新发现的斑岩型矿床。流体包裹体测温和激光拉曼探针分析研究表明，宏远（铜）钼矿发育气液、气体和含子矿物包裹体等3类包裹体，气液比变化大，均一温度集中在140℃～200℃和260℃～340℃两个区间；吐克吐克钼铜矿只含有气液和含子矿物两类包裹体，气液比变化小，均一温度集中在180℃～220℃。两个矿区均发育高盐度和低盐度的NaCl-H20-CH4-CO2流体，显示含甲烷还原性流体的性质。宏远（铜）钼矿辉钼矿Re-0s同位素分析表明其成矿年龄为314．3±1．9Ma，与西准噶尔包古图斑岩铜矿成矿时代一致。Hongyuan（Cu） Mo deposit and Tuketuke Mo-Cu deposit are newly discovered porphyry- type deposits in the West Junggar region, Xinjiang. Microthermometry and Laser Raman Microprobe Analysis （LRM）of fluid inclusions indicate that there are three types of fluid inclusions at Hongyuan（Cu） Mo deposit,including aqueous fluid inclusions, gas inclusions and multi-phase fluid inclusions with daughter minerals. The gas-liquid ratios of fluid inclusions at Hongyuan（Cu） Mo deposit vary greatly. And homogenization temperatures concentrate in 140 % to 200 ℃ and 260 ℃ to 340 ℃. There are only two types of fluid inclusions at Tuketuke Mo-Cu deposit, aqueous fluid inclusions and multi-phase fluid inclusions with daughter minerals, with small changes of gas-liquid ratios. The homogenization temperatures at Tuketuke deposit concentrate in 180 ℃ to 220 ~℃. The two deposits both develop high-salinity and low-salinity NaC1-HEO-CH4-CO2 fluid system. And they both contain CH4, a kind of reductive fluid. The Re-Os isotope analysis of molybdenite from Hongyuan （Cu） Mo deposit indicates a mineralization age of 314.3± 1.9 Ma, consistent with Baogutu porphyry deposit in the West Junggar.

关 键 词：流体包裹体 RE-OS同位素年龄 宏远(铜)钼矿 吐克吐克钼铜矿 新疆西准噶尔 

分 类 号：P618.4[天文地球—矿床学]