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引用本文:何 鹏1 严光生2 祝新友3 张忠义3 王艳丽3 程细音3 李永胜2 甄世民1 杜泽忠1 贾德龙1 巩小栋1. 青海赛什塘铜矿床流体包裹体研究[J]. 中国地质, 2013, 40(2): 580-593.
HE Peng1, YAN Guang-sheng2, ZHU Xin-you3, ZHANG Zhong-yi3, WANG Yan-li3, CHENG Xi-yin3, LI Yong-sheng2, ZHEN Shi-min1, DU Ze-zhong1, JIA De-long1, GONG Xiao-dong1. Fluid inclusion study of the Saishitang Cu deposit in Qinghai[J]. Geology in China, 2013, 40(2): 580-593(in Chinese with English abstract).
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青海赛什塘铜矿床流体包裹体研究
何 鹏1 严光生2 祝新友3 张忠义3 王艳丽3 程细音3 李永胜2 甄世民1 杜泽忠1 贾德龙1 巩小栋1
作者单位
何 鹏1 严光生2 祝新友3 张忠义3 王艳丽3 程细音3 李永胜2 甄世民1 杜泽忠1 贾德龙1 巩小栋1 1.中国地质大学(北京)地球科学与资源学院,北京100083;2.中国地质调查局发展研究中心,北京100037;3.北京矿产地质研究院,北京100012 
摘要:
提要:对青海赛什塘铜矿床内与成矿有关的矽卡岩中石榴子石、透辉石及硫化物石英脉中流体包裹体的岩相学、显微测温学和显微激光拉曼光谱分析等的研究结果表明,流体包裹体有富液相、富气相和含子矿物多相包裹体3种类型;早期矽卡岩阶段均一温度436~562℃,盐度为34 wt %~45wt%NaCl eqv.,代表了高温、高盐度岩浆流体;退变质阶段均一温度322~419℃,盐度为15wt %~39 wt%NaCl eqv.;硫化物阶段均一温度235~366℃,盐度5wt%~36wt%NaCl eqv.。激光拉曼光谱分析结果表明,包裹体中气相成分以CH4、H2S、CO2和H2O为主。成矿流体属于中高温、高盐度的NaCl-H2O-CO2-CH4体系,在290~360℃之间发生了强烈的流体沸腾作用,导致大量的金属硫化物沉淀,成矿流体的沸腾作用是导致铜矿床形成的重要因素。
关键词:  流体包裹体;沸腾作用;矽卡岩铜矿床;  赛什塘;青海
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Fluid inclusion study of the Saishitang Cu deposit in Qinghai
HE Peng1, YAN Guang-sheng2, ZHU Xin-you3, ZHANG Zhong-yi3, WANG Yan-li3, CHENG Xi-yin3, LI Yong-sheng2, ZHEN Shi-min1, DU Ze-zhong1, JIA De-long1, GONG Xiao-dong1
Abstract:
Abstract:The fluid inclusions in the Saishitang Cu deposit can be classified into liquid-rich two-phase, gas-rich two-phase and daughter mineral-bearing polyphase types. According to studies of petrography, microthermometry and laser Raman spectrographic analyses of fluid inclusions in garnet and diopside from skarn and sulflde-rich quartz veins, the fluid inclusion homogenization temperatures and salinities of the early skarn stage vary in the range of 436℃-562℃ and 34 %-45%wt%NaCl eqv. respectively, indicating that the fluid is dominated by magmatic water characterized by high temperature and high salinity; the fluid inclusion homogenization temperatures and salinities of the retrogressive metamorphic stage vary in the range of 322℃-419℃ and 15%-39%wt%NaCl eqv. Respectively; the fluid inclusion homogenization temperatures and salinities of the sulfide stage vary in the range of 235℃-366℃ and 5%~36%wt%NaCl eqv. respectively. Laser Raman spectrogtaphic analyses show that the gas phase components of fluid inclusions are mainly composed of CH4, H2S, CO2 and H2O, and the ore-forming fluids belong to the NaCl-H2O-CH4-H2S-CO2 system. The boiling event of ore-forming fluid occurred at temperatures of 290℃~360℃, resulting in the formation of massive metal sulfides. The fluid boiling was favorable for the formation of the Saishitang Cu deposit.
Key words:  fluid inclusion  fluid boiling  skarn Cu deposit  Saishitang  Qinghai