| 陕西山阳庙梁金矿地质特征及流体包裹体研究 |
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| 引用本文： | 陈永康,梁婷,周义,丁亮,李聪,李尚,岑炬标,张三龙.陕西山阳庙梁金矿地质特征及流体包裹体研究[J].岩石矿物学杂志,2022,41(1):95-111. |
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| 作者姓名： | 陈永康 梁婷 周义 丁亮 李聪 李尚 岑炬标 张三龙 |
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| 作者单位： | 长安大学地球科学与资源学院;南京大学内生金属矿床成矿机制研究国家重点实验室南京大学地球科学与工程学院;长安大学成矿作用及其动力学实验室;陕西地矿综合地质大队 |
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| 基金项目： | 中国地质调查局项目(DD20160346,DD20190379-53);陕西地矿局综合地质大队项目(220227180191)。 |
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| 摘 要： | 庙梁金矿床位于南秦岭柞水-山阳矿集区的中心地带,为了查明庙梁金矿成矿流体特征、金的沉淀机制及矿床成因,对该矿床不同成矿阶段脉石矿物中的流体包裹体进行了详细的岩相学、显微测温、激光拉曼光谱分析研究并与周边典型金矿床特征进行了对比.结果 表明,该矿床包裹体类型丰富,成矿早阶段主要为H2O-NaCl型包裹体(Ⅱ型)、部分H2...
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| 关 键 词： | 地球化学 流体包裹体 庙梁金矿床 南秦岭 |
| 收稿时间： | 2021/4/8 0:00:00 |
Geological characteristics and fluid inclusions of Miaoliang gold deposit, Shanyang, Shaanxi Province |
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| CHEN Yong-kang,LIANG Ting,ZHOU Yi,DING Liang,LI Cong,LI Shang,CEN Ju-biao,ZHANG San-long.Geological characteristics and fluid inclusions of Miaoliang gold deposit, Shanyang, Shaanxi Province[J].Acta Petrologica Et Mineralogica,2022,41(1):95-111. |
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| Authors: | CHEN Yong-kang LIANG Ting ZHOU Yi DING Liang LI Cong LI Shang CEN Ju-biao ZHANG San-long |
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| Institution: | (School of Earth Sciences and Resources,Chang’an University;State Key Laboratory for Mineral Deposits Research,School of Earth Sciences and Engineering,Nanjing University;Laboratory of Mineralization and Dynamics,Chang’an University;Shaanxi Geological and Mineral Comprehensive Geological Brigade) |
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| Abstract: | The Miaoliang gold deposit is located in the center of the Southern Qinling Zhashui-Shanyang ore concentration area.In order to find out the characteristics of ore-forming fluids,the precipitation mechanism of gold and genesis of the Miaoliang gold deposit,the fluid inclusions in gangue minerals at different metallogenic stages of the deposit were studied in detail by petrography,microthermometry,laser Raman spectroscopy,comparing with the characteristics of typical surrounding gold deposits.The results show that the deposit is rich in types of inclusions.The early stage of mineralization is mainly H2O-NaCl type inclusions(typeⅡ),part of H2O-CO2 type inclusions(typeⅢ)and a small amount of pure CO2 type inclusions(typeⅠ);the main metallogenic stage is mainly H2O-NaCl type inclusions(typeⅡ)and H2O-CO2 type inclusions(typeⅢ);the late mineralization stage is mainly H2O-NaCl type inclusions(typeⅡ).Microscopic temperature measurements show that from the early stage to the late stage,the fluid properties evolve from medium and high temperature,medium salinity,low density,CO2-rich fluid to medium and low temperature,medium-low salinity,medium density and CO2-poor fluid.Laser Raman analysis shows that the gas phase of inclusions contains a certain amount of CH4 and H2S in addition to CO2.Comprehensive study concluded that gold migrates in the form of Au(HS)-2 complex in the fluid under the reduction environment of low oxygen fugacity,and that immiscibility due to the decrease of temperature and pressure is the main mechanism of gold precipitation in the process of fluid upward migration. |
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| Keywords: | geochemistry fluid inclusion Miaoliang gold deposit South Qinling |
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