| 40Ar/39Ar and Rb-Sr Ages of the Tiegelongnan Porphyry Cu-(Au) Deposit in the Bangong Co-Nujiang Metallogenic Belt of Tibet, China: Implication for Generation of Super-Large Deposit |
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| 作者姓名： | LIN Bin CHEN Yuchuan TANG Juxing WANG Qin SONG Yang YANG Chao WANG Wenlei HE Wen ZHANG Lejun |
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| 基金项目： | We are grateful to two anonymous reviewers and the Editor-in-Chief for their constructive comments. This work was jointly sponsored by the Public Science and Technology Research Funds Projects, Ministry of Land Resources of the People’s Republic of China (project No. 201511017 and 201511022-02); the Basic Research Fund of the Chinese Academy of Geological Sciences (Grant No. YYWF201608); the National Natural Science Foundation of China (Grant No. 41402178); Geological Survey Project of the China Geological Survey (project 1212011405040), Golden Dragon Mining Co. Ltd. (project XZJL-2013-JS03) and China Scholarship Council. Cenozoic Geoscience Editing & Consultancy (Australia) is acknowledged for its scientific and language editing service. |
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| 摘 要： | The Tiegelongnan deposit is a newly discovered super-large porphyry-epithermal Cu-(Au) deposit in the western part of the Bangong Co-Nujiang metallogenic belt, Tibet(China). Field geology and geochronology indicate that the porphyry mineralization was closely related to the Early Cretaceous intermediate-felsic intrusions(ca. 123–120 Ma). Various epithermal ore and gangue mineral types were discovered in the middle-shallow part of the orebody, indicating the presence of epithermal mineralization at Tiegelongnan. Potassic, propylitic, phyllic and advanced argillic alteration zones were identified. ~(40)Ar/~(39)Ar dating of hydrothermal biotite(potassic zone), sericite(phyllic zone), and alunite(advanced argillic zone) in/around the ore-bearing granodiorite porphyry yielded 121.1±0.6 Ma(1σ), 120.8±0.7 Ma(1σ) and 117.9±1.6 Ma(1σ), respectively. Five hydrothermal mineralization stages were identified, of which the Stage IV pyrite was Rb-Sr dated to be 117.5±1.8 Ma(2σ), representing the end of epithermal mineralization. Field geology and geochronology suggest that both the epithermal and porphyry mineralization belong to the same magmatic-hydrothermal system. The Tiegelongnan super-large Cu-(Au) deposit may have undergone a prolonged magmatichydrothermal evolution, with the major mineralization event occurring at ca.120–117Ma.
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| 收稿时间： | 2023/5/16 0:00:00 |
| 修稿时间： | 2017/1/18 0:00:00 |
40Ar/39Ar and Rb-Sr Ages of the Tiegelongnan Porphyry Cu-(Au) Deposit in the Bangong Co-Nujiang Metallogenic Belt of Tibet, China: Implication for Generation of Super-Large Deposit |
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| Authors: | LIN Bin CHEN Yuchuan TANG Juxing WANG Qin SONG Yang YANG Chao WANG Wenlei HE Wen and ZHANG Lejun |
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| Institution: | 1 MLR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese
Academy of Geological Sciences, Beijing 100037, China
2 Centre of Excellence in Ore Deposit (CODES), University of Tasmania, Hobart, 7001, Australia,1 MLR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese
Academy of Geological Sciences, Beijing 100037, China,1 MLR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese
Academy of Geological Sciences, Beijing 100037, China,3 Chengdu University of Technology, Chengdu 610059, China,1 MLR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese
Academy of Geological Sciences, Beijing 100037, China,4 Département de géologie et de génie géologique, Université Laval, Quebec, QC G1V0A6, Canada,5 Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China,6 China University of Geosciences, Beijing 100083, China and 2 Centre of Excellence in Ore Deposit (CODES), University of Tasmania, Hobart, 7001, Australia |
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| Abstract: | |
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| Keywords: | 40Ar/39Ar and Rb-Sr dating Tiegelongnan Cu-(Au) deposit Bangong Co-Nujiang metallogenic belt Tibet Proto-Tethys |
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