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| Re-Os Age of Cu-Ni Ores from the Huangshandong Cu-Ni Sulfide Deposit in the East Tianshan Mountains and Its Implication for Geodynamic Processes | |
| 作者姓名： | MAO Jingwen YANG Jianmin QU Wenjun DU Andao WANG Zhiliang and HAN Chunming Faculty of Geosciences and Resources China University of Geosciences Beijing E-mail: jingwenmao@.netInstitute of Mineral Resources Chinese Academy of Geological Sciences Beijing National Research Center of Geoanalysis Chinese Academy of Geological Sciences Beijing |
| 作者单位： | MAO Jingwen，YANG Jianmin，QU Wenjun，DU Andao，WANG Zhiliang and HAN Chunming Faculty of Geosciences and Resources，China University of Geosciences，Beijing 100083; E-mail: jingwenmao@263.netInstitute of Mineral Resources，Chinese Academy of Geological Sciences，Beijing 100037 National Research Center of Geoanalysis，Chinese Academy of Geological Sciences，Beijing 100037 |
| 基金项目： | 国家自然科学基金，国家重点基础研究发展计划(973计划)，the New Round Geological Survey Project |
| 摘 要： | An isochron age of 282±20 (95% conf. limit) Ma of the sulfide ores in the Huangshandong Cu-Ni sulfide deposit, the East Tianshan Mountains has been obtained through Re-Os isotopic measurement. The age implies that the Cu-Ni sulfide deposit and other related deposits in the same area occurred in a Permian extensional environment of post-collision instead of Devonian-Early Carboniferous ophiolite-related oceanic or island arc environments inferred before. It shares the same ages with the orogenic and epithermal gold deposit systems in the same area. An initial 187Os/188Os ratio of 0.25±0.04 (1σ) and a γos value of 99 on average display the participation of large quantities of crustal components into the rock-forming and ore-forming system during mineralization and magmatic emplacement. |
| 关 键 词： | 铜镍硫化物矿床 天山 等时线年龄 铜镍矿石 地球动力学 铼－锇同位素 |
Re-Os Age of Cu-Ni Ores from the Huangshandong Cu-Ni Sulfide Deposit in the East Tianshan Mountains and Its Implication for Geodynamic Processes |
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| Authors: | MAO Jingwen YANG Jianmin QU Wenjun DU Andao WANG Zhiliang and HAN Chunming Faculty of Geosciences and Resources China University of Geosciences Beijing E-mail: jingwenmao@netInstitute of Mineral Resources Chinese Academy of Geological Sciences Beijing National Research Center of Geoanalysis Chinese Academy of Geological Sciences Beijing |
| Abstract: | An isochron age of 282±20 (95% conf. limit) Ma of the sulfide ores in the Huangshandong Cu-Ni sulfide deposit, the East Tianshan Mountains has been obtained through Re-Os isotopic measurement. The age implies that the Cu-Ni sulfide deposit and other related deposits in the same area occurred in a Permian extensional environment of post-collision instead of Devonian-Early Carboniferous ophiolite-related oceanic or island arc environments inferred before. It shares the same ages with the orogenic and epithermal gold deposit systems in the same area. An initial 187Os/188Os ratio of 0.25±0.04 (1σ) and a (Os value of 99 on average display the participation of large quantities of crustal components into the rock-forming and ore-forming system during mineralization and magmatic emplacement. |
| Keywords: | Huangshandong Cu-Ni sulfide deposit East Tianshan mountains Permian Re-Os age |
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