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| Re-Os isotope dating of molybdenites in the Huang-shaping Pb-Zn-W-Mo polymetallic deposit, Hunan Province, South China and its geological significance | |
| 作者姓名： | YAO JunMing HUA RenMin QU WenJun QI HuaWen LIN JinFu & DU AnDao State Key Laboratory of Crust-Mantle Evolution and Mineralization |
| 作者单位： | YAO JunMing1，HUA RenMin1，QU WenJun2，QI HuaWen3，LIN JinFu1，4 & DU AnDao2 1 State Key Laboratory of Crust-Mantle Evolution and Mineralization，Department of Earth Sciences，Nanjing University，Nanjing 210093，China; 2 Institute of Rock and Mineral Analysis，Chinese Academy of Geological Sciences，Beijing 100037，China; 3 Institute of Geochemistry，Chinese Academy of Sciences，Guiyang 550002，China; 4 Department of Resources and Environment Engineering，Guilin Institute of Technology，Guilin 541004，China |
| 摘 要： | The large-scale Huangshaping Pb-Zn-W-Mo polymetallic deposit is located in the central Nanling min- eralization zone, South China. Six molybdenite samples from the Huangshaping deposit were selected for Re-Os isotope measurement in order to define the mineralization age of the deposit. It yields a Re-Os isochron age of 154.8±1.9 Ma (2σ ), which is in accordance with the Re-Os model ages of 150.9― 156.9 Ma. This age is about 7 Ma younger than their host granite porphyry, which was dated as 161.6±1.1 Ma by zircon U-Pb method using LA-ICPMS. All these ages demonstrate that the Huang- shaping granite and related Pb-Zn-W-Mo deposit occurred in the middle Yanshanian period, when many other granitoid and related ore deposits emplaced and formed, e.g. the Qitianling granite and Furong tin deposit, the Qianlishan granite and giant Shizhuyuan W-Sn-Mo-Bi deposit and Jinchuantang Sn-Bi deposit in the nearby area. They constitute the main part of the magmatic-metallogenic belt of southern Hunan, and represent the large-scale metallogeny in middle Yanshanian in the area. The lower rhenium content in molybdenite of Huangshaping deposit suggests that the ore-forming material was mainly of crust origin. |
| 收稿时间： | 21 November 2005 |
| 修稿时间： | 8 June 2006 |
Re-Os isotope dating of molybdenites in the Huangshaping Pb-Zn-W-Mo polymetallic deposit,Hunan Province,South China and its geological significance |
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| YAO JunMing,HUA RenMin,QU WenJun,QI HuaWen,LIN JinFu, & DU AnDao State Key Laboratory of Crust-Mantle Evolution and Mineralization,.Re-Os isotope dating of molybdenites in the Huang-shaping Pb-Zn-W-Mo polymetallic deposit, Hunan Province, South China and its geological significance[J].Science in China(Earth Sciences),2007,50(4):519-526. | |
| Authors: | Yao JunMing Hua RenMin Qu WenJun Qi HuaWen Lin JinFu Du AnDao |
| Institution: | 1. State Key Laboratory of Crust-Mantle Evolution and Mineralization,Department of Earth Sciences,Nanjing University,Nanjing 210093,China 2. Institute of Rock and Mineral Analysis,Chinese Academy of Geological Sciences,Beijing 100037,China 3. Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550002,China 4. State Key Laboratory of Crust-Mantle Evolution and Mineralization,Department of Earth Sciences,Nanjing University,Nanjing 210093,China;Department of Resources and Environment Engineering,Guilin Institute of Technology,Guilin 541004,China |
| Abstract: | The large-scale Huangshaping Pb-Zn-W-Mo polymetallic deposit is located in the central Nanling mineralization zone, South China. Six molybdenite samples from the Huangshaping deposit were selected for Re-Os isotope measurement in order to define the mineralization age of the deposit. It yields a Re-Os isochron age of 154.8±1.9 Ma (2σ), which is in accordance with the Re-Os model ages of 150.9–156.9 Ma. This age is about 7 Ma younger than their host granite porphyry, which was dated as 161.6±1.1 Ma by zircon U-Pb method using LA-ICPMS. All these ages demonstrate that the Huangshaping granite and related Pb-Zn-W-Mo deposit occurred in the middle Yanshanian period, when many other granitoid and related ore deposits emplaced and formed, e.g. the Qitianling granite and Furong tin deposit, the Qianlishan granite and giant Shizhuyuan W-Sn-Mo-Bi deposit and Jinchuantang Sn-Bi deposit in the nearby area. They constitute the main part of the magmatic-metallogenic belt of southern Hunan, and represent the large-scale metallogeny in middle Yanshanian in the area. The lower rhenium content in molybdenite of Huangshaping deposit suggests that the ore-forming material was mainly of crust origin. Supported by the State Key Fundamental Research Project (Grant No. G1999CB403209) and the National Natural Science Foundation of China (Grant No. 40572057) |
| Keywords: | Re-Os isotope dating molybdenite Huangshaping deposit granite southern Hunan Province |
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