| 黔西南水银洞卡林型金矿构造地球化学及对隐伏矿找矿的指示 |
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| 关键词:Carlin-type gold deposit Shuiyindong southwestern Guizhou tectono-geochemistry concealed ore deposit |
| 基金项目:国家重点研发计划(编号: 2016YFC0600607);国家自然科学基金项目(编号: 41803046);贵州省教育厅青年科技人才成长项目(编号: 黔教合KY字(2016)229);贵州省科技计划项目(编号: 黔科合基础[2019]1138号) |
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| Tectono-geochemistry and Concealed Ores Prospecting in the Shuiyindong Gold Deposit of Southwestern Guizhou |
| The Shuiyindong deposit is the largest concealed Carlin-type gold deposit ever discovered in southwestern Guizhou. The discovery of the Shuiyindong deposit indicates a huge potential of deep concealed Carlin-type orebody, and also presents a severe challenge to exploration methods for concealed orebodies in southwestern Guizhou. To investigate the exploration methods for concealed ores, the authors collected rocks and calcite veins in drill holes from a representative section, and soil along surficial fractures/faults in the Shuiyindong mining area. The values of Au, As, Sb, Hg, Tl and U for the rocks, the values of As, Sb, Tl and U for the soil, and the compositions of C-O isotopes and rare earth elements for the calcites were analyzed. Rocks along anticline axis, unconformity between middle-upper Permian and reverse faults display elevated values of Au and other ore-forming elements. Rocks with high U concentration also occur along the unconformity and reverse faults, but not occur along the anticline axis, which may record another U-bearing hydrothermal event. Calcites with low δ13C (22.1‰), and high concentrations of middle rare earth elements (?MREE>1.89) mainly appear along the anticline axis and reverse faults. There are high corresponding relations of ore-forming elements geochemical anomalies between deep concealed orebodies and soil. The anticline axis and reverse faults possibly acted as the upwelling channel for deep ore-forming information. Fillings in surficial fractures/faults and soil around surficial fractures/faults may contain significant mineralization information and have the potential to be a vital tool for identifying drilling targets. |
| TAN Qin-ping,XIA Yong,XIE Zhuo-jun,WANG Ze-peng,LI Song-tao,WEI Dong-tian,YAN Jun,ZHAO Yi-meng.2020.Tectono-geochemistry and Concealed Ores Prospecting in the Shuiyindong Gold Deposit of Southwestern Guizhou[J].Acta Geoscientica Sinica,41(6):886-898. |
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