| 新疆东天山玉海铜(钼)矿床流体包裹体和稳定同位素研究 |
| Received:September 04, 2017 Revised:February 08, 2018 点此下载全文 |
| 引用本文：LIU ShuaiJie,YU JinJie,WANG TieZhu,LU BangCheng,CHEN BaoYun,CHEN ShouBo,HUANG BaoQiang,WANG Chao.2018.Fluid inclusions and stable isotope study of Yuhai copper-(molybdenum) deposit in eastern Tianshan Mountains, Xinjiang[J].Mineral Deposits,37(2):371~386 |
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| Author Name | Affiliation | E-mail | | LIU ShuaiJie | MLR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China | | | YU JinJie | MLR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China | yjjchina@sina.com | | WANG TieZhu | Wanping Sub-Regional Office of Beijing Fengtai District Government, Beijing 100072, China | | | LU BangCheng | Guangxi Cenxi Bereau of Industry and Information Technology, Cenxi 543200, Guangxi, China | | | CHEN BaoYun | MLR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China | | | CHEN ShouBo | No. 704 Geological Party, Non-ferrous Geoexploration Bureau of Xinjiang, Hami 839000, Xinjiang, China | | | HUANG BaoQiang | No. 704 Geological Party, Non-ferrous Geoexploration Bureau of Xinjiang, Hami 839000, Xinjiang, China | | | WANG Chao | No. 704 Geological Party, Non-ferrous Geoexploration Bureau of Xinjiang, Hami 839000, Xinjiang, China | |
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| 基金项目:中国地质调查局地质调查项目（编号：12120115055601、DD20160007）资助 |
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| 中文摘要:玉海铜（钼）矿床成矿岩体为石英闪长（玢）岩，矿化呈细脉状、细脉-浸染状和稀疏浸染状。围岩蚀变主要为钾硅酸盐化、石英-绢云母化、青磐岩化和黏土化蚀变。矿床类型为斑岩型。铜（钼）矿化主要发育于钾硅酸盐化阶段、石英-绢云母化阶段和青磐岩化阶段。流体包裹体可划分为气液两相包裹体、含子晶三相包裹体和CO2包裹体3种类型。钾硅酸盐化阶段的均一温度为307~423℃，盐度w（NaCleq）为4.18%~10.11%，密度0.62~0.77 g/cm3，属于高温、中-低盐度流体；石英-绢云母化阶段均一温度为172~336℃，盐度为w（NaCleq）为3.23%~8.55%，密度0.70~0.93 g/cm3，属于中温、低盐度流体；晚期青磐岩化阶段均一温度155~296℃，盐度w（NaCleq）为3.71%~9.08%，密度0.80~0.96 g/cm3，属于中低温、低盐度流体。从早阶段到晚阶段，成矿流体温度逐渐下降，各成矿阶段成矿流体盐度均小于11%，但钾硅酸盐化阶段成矿流体盐度稍高。石英-绢云母化阶段成矿流体δD=-91.6‰~-72.1‰，δ18OH2O=-1.8‰~6.3‰；青磐岩化阶段成矿流体δD=-97.1‰~-68.3‰，δ18OH2O=-6.3‰~2.2‰；成矿流体具有岩浆水和大气降水混合特征，但青磐岩化阶段大气降水含量更高。硫化物的δ34S值为-3.5‰~2.8‰，硫来自石英闪长（玢）岩。 |
| 中文关键词:地质学 流体包裹体 稳定同位素 成矿作用 玉海铜(钼)矿床 东天山 |
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| Fluid inclusions and stable isotope study of Yuhai copper-(molybdenum) deposit in eastern Tianshan Mountains, Xinjiang |
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| Abstract:The Yuhai porphyry Cu-(Mo) deposit is hosted by a quartz diorite (porphyrite) stock. Mineralization occurs as veinlets, veinlet-disseminations, and sparse disseminations, and is associated with quartz diorite (porphyrite). The wall-rock alterations include K-silicate alteration, quartz-sericite alteration, propylitic alteration and clay alteration. The mineralization can be divided into K-silicate stage, quartz-sericite stage and propylitic stage. Copper and molybdenum mineralization occurred at the every stage. Three types of fluid inclusions were recognized:vapor and liquid two-phase inclusions, daughter mineral-bearing three-phase inclusions and CO2 inclusions. Homogenization temperatures of fluid inclusions at the K-silicate stage range from 307℃ to 423℃ with salinities from 4.18% to 10.11% and densities from 0.62 g/cm3 to 0.77 g/cm3, indicating high temperature and middle to low salinity inclusions. Homogenization temperatures of fluid inclusions at the quartz-sericite stage range from 172℃ to 336℃ with salinities from 3.23% to 8.55% and densities from 0.70 g/cm3 to 0.93 g/cm3, indicating middle temperature and low salinity inclusions. Homogenization temperatures of the latest propylitic stage vary from 155℃ to 296℃ with salinities from 3.71% to 9.08% and densities from 0.80 g/cm3 to 0.96 g/cm3, indicating middle-low temperature and low salinity inclusions. Temperatures decreased gradually from early stage to late stage with the slightly high salinities at the K-silicate stage. The δ18OH2O values of the ore-forming fluids of the quartz-sericite stage range from -1.8‰ to 6.3‰ with δD from -91.6‰ to -72.1‰ while δ18OH2O values of the ore-forming fluids at the propylitic stage range from -6.3‰ to 2.2‰ with δD from -97.1‰ to -68.3‰,implying that ore-forming fluids were mixed magmatic fluids and meteoric water. Nevertheless, the quartz-sericite stage contained a higher portion of magmatic fluids than the propylitic stage. The δ34S values of sulfides range from -3.5‰ to 2.8‰. The sulfur in the Yuhai Cu-(Mo) deposit was derived from magma, i.e., from ore-forming quartz diorite (porphyrite). |
| keywords:geology fluid inclusions stable isotopes metallogenesis Yuhai Cu-(Mo) deposit eastern Tianshan Mountains |
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