Geological Characteristics and Ore‐forming Time of the Dexing Porphyry Copper Ore Mine in Jiangxi Province |
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| Authors: | GUO Shuo ZHAO Yuanyi QU Huanchun WU Dexin XU Hong LI Chao LIU Yan ZHU Xiaoyun WANG Zengke |
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| Institution: | 1. China University of Geosciences, Beijing 100083, China;2. MLR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China;3. National Research Centre of Geoanalysis, Beijing 100037, China;4. Jiangxi Copper Corporation Dexing Copper, Dexing 334200, China |
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| Abstract: | The Dexing porphyry copper ore mine is located in the Qin‐Hang metallogenic belt between the Yangtze block and the Cathaysia block. It is a giant porphyry copper mine in China, including 3 ore districts: Tongchang, Fujiawu and Zhushahong. Our analyses of Re in molybdenite indicate that the ore‐forming material of the copper ore deposits in Dexing should be mainly mantle‐derived. Our study fills in a gap in the study of formation time of the Dexing copper mine, and further proves that the copper ore deposits in the three ore districts should be formed simultaneously, about 170 Ma, belonging to the early Yanshan period, and that the formation time of the copper ore deposits should be consistent with the formation time of granodiorite porphyry in which the copper ore deposits are hosted. Promising areas for seeking porphyry copper ore deposits is predicated to be the west or southwest of Dexing. |
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| Keywords: | Re‐Os isotopic dating molybdenite porphyry copper deposit |
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