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.
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Supported by the State Key Fundamental Research Project (Grant No. G1999CB403209) and the National Natural Science Foundation of China (Grant No. 40572057)
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Yao, J., Hua, R., Qu, W. et al. Re-Os isotope dating of molybdenites in the Huangshaping Pb-Zn-W-Mo polymetallic deposit, Hunan Province, South China and its geological significance. SCI CHINA SER D 50, 519–526 (2007). https://doi.org/10.1007/s11430-007-2052-y
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DOI: https://doi.org/10.1007/s11430-007-2052-y