| Contrast in Fluid M etallogeny between the Tianmashan Au-S Deposit and the Datuanshan Cu Deposit in Tongling, Anhui Province |
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| 作者姓名： | LEE Hyun Koo |
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| 作者单位： | Depatment of |
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| 基金项目： | This study was financially supported by the Ministry of Science and Technology of China，国家自然科学基金 |
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| 摘 要： | A comprehensive contrast of ore-forming geological background and ore-forming fluid features, especially fluid ore-forming processes, has been performed between the Tianmashan and the Datuanshan ore deposits in Tongling, Anhui Province. The major reasons for the formation of the stratabound skarn Au-S ore deposit in Tianmashan and the stratabound skarn Cu ore deposit in Datuanshan are analyzed in accordance with this contrast. The magmatic pluton in Tianmashan is rich in Au and poor in Cu, but that in Datuanshan is rich in Cu and Au. The wallrock strata in Tianmashan contain Au-bearing pyrite layers with some organic substance but those in Datuanshan contain no such layers. Moreover, the ore-forming fluids in Tianmashan are dominantly magmatic ones at the oxide and sulfide stages, but those with high content of Cu in Datuanshan are mainly groundwater fluids. In addition, differences in compositional evolution and physicochemical condition variation of the ore-forming fluids result in gradual dispersion
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Contrast in Fluid M etallogeny between the Tianmashan Au-S Deposit and the Datuanshan Cu Deposit in Tongling, Anhui Province |
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| Authors: | DU Yangsong TIAN Shihong LI Xuejun and LEE Hyun KooKey Laboratory of Lithosphere Tectonics and Exploration Ministry of Education Xueyuan Roa Beijing Faculty of Earth Sciences and Mineral Resources China Universityof Geosciences Xueyuan Roa Beijing Institute of Mineral Resources Chinese Academy of Geological Sciences Baiwanzhuang Roa Beijing |
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| Institution: | Key Laboratory of Lithosphere Tectonics and Exploration,Ministry of Education, 29 Xueyuan Road, Beijing 100083;Faculty of Earth Sciences and Mineral Resources, China University of Geosciences, 29 Xueyuan Road, Beijing 100083 Faculty of Earth Sciences and Mineral Resources, China University of Geosciences, 29 Xueyuan Road, Beijing 100083;Institute of Mineral Resources, Chinese Academy of Geological Sciences, 26 Baiwanzhuang Road, Beijing 100037 Faculty of Earth Sciences and Mineral Resources, China University of Geosciences, 29 Xueyuan Road, Beijing 100083 Department of Geology, Chungnam National University, 220 Kungdong, Yuseong Ku, Taejon 305-764, Republic of Korea |
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| Abstract: | A comprehensive contrast of ore-forming geological background and ore-forming fluid features, especially fluid ore-forming processes, has been performed between the Tianmashan and the Datuanshan ore deposits in Tongling, Anhui Province. The major reasons for the formation of the stratabound skarn Au-S ore deposit in Tianmashan and the stratabound skarn Cu ore deposit in Datuanshan are analyzed in accordance with this contrast. The magmatic pluton in Tianmashan is rich in Au and poor in Cu, but that in Datuanshan is rich in Cu and Au. The wallrock strata in Tianmashan contain Au-bearing pyrite layers with some organic substance but those in Datuanshan contain no such layers. Moreover, the ore-forming fluids in Tianmashan are dominantly magmatic ones at the oxide and sulfide stages, but those with high content of Cu in Datuanshan are mainly groundwater fluids. In addition, differences in compositional evolution and physicochemical condition variation of the ore-forming fluids result in gradual dispersion of Cu or Au in the late stage of the fluid ore-forming process. This is also an important metallogenic factor for the stratabound skarn Au-S ore deposit in Tianmashan and stratabound skarn Cu ore deposit in Datuanshan. |
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| Keywords: | fluid inclusion fluid ore-forming process contrast in fluid metallogeny Au-S ore deposit Cu ore deposit magmatic fluid groundwater fluid Tongling Anhui Province |
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