Geodynamic settings and tectonic model of skarn gold deposits in China: An overview |
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| Authors: | Yan-Jing Chen Hua-Yong Chen Khin Zaw Franco Pirajno Zeng-Jie Zhang |
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| Institution: | 1. School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China;2. Center of Deep Sea Research, Center of Ocean Mega Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;3. Deep-Sea Multidisciplinary Research Center, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China;4. School of Marine Sciences, University of the Chinese Academy of Sciences, Beijing 100049, China;1. Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences,Beijing 100029, PR China;2. Centre for Exploration Targeting, University of Western Australia, 35, Stirling Highway, Crawley 6009, Australia |
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| Abstract: | Seventy skarn-type gold deposits, including 1 super-large, 19 large and 24 medium-sized, are known from different geotectonic units of China. They contain a total resource of approximately 1000 t of gold (625 t in South China), and account for 20% of China's gold reserves. These skarn deposits are sited in collisional orogenic belts, fault-controlled magmatic belts and reactivated cratonic margins. All of the Chinese skarn gold provinces were affected by Phanerozoic collisional orogenesis. The timing of the metallogenic events and the spatial–temporal distribution of the Chinese skarn gold deposits indicates that they were formed during ore-forming processes linked to the transition from shortening to extension in the geodynamic evolution of a collision orogen, and not to subduction systems as is commonly advocated for porphyry copper systems around the Pacific Rim. |
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| Keywords: | Skarn gold deposit Tectonic provinces Orogenesis Metallogenic timing Continental collision CMF model China |
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