| Formation of the adakite-like granitoid complex and porphyry copper-gold deposit in Shaxi from southern Tancheng-Lujiang fault belt： A clue to the West Pacific plate subduction |
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| 作者单位： | LAN Xianghua(CAS Key Laboratory of Crust-Mantle Materials and Environments, School of Earth & Space Sciences, University of Science & Technology of China,Hefei 230026, China);YANG Xiaoyong(CAS Key Laboratory of Crust-Mantle Materials and Environments, School of Earth & Space Sciences, University of Science & Technology of China,Hefei 230026, China;State Key Laboratory of Geological Processes and Mineral Resources, China University of Geoscience,Wuhan 430074,China);YU Liangfan,ZHANG Qianming(No.327 Geological Party of Anhui Province, Hefei 230011, China) |
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| 基金项目： | the Knowledge Innovation Project of the Chinese Acad-emy of Sciences，国家自然科学基金，parts of experimental work is sup-ported from the Opening Funding of State Key Labo-ratory of Geological Processes and Mineral Resources |
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| 摘 要： |
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| 关 键 词： | 斑岩 金成矿 物化环境 温度 |
| 收稿时间： | 2009-04-07 |
Formation of the adakite-like granitoid complex and porphyry copper-gold deposit in Shaxi from southern Tancheng-Lujiang fault belt: A clue to the West Pacific plate subduction |
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| Xianghua Lan,Xiaoyong Yang,Liangfan Yu,Qianming Zhang. Formation of the adakite-like granitoid complex and porphyry copper-gold deposit in Shaxi from southern Tancheng-Lujiang fault belt: A clue to the West Pacific plate subduction[J]. Chinese Journal of Geochemistry, 2009, 28(1): 28-43. DOI: 10.1007/s11631-009-0028-7 |
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| Authors: | Xianghua Lan Xiaoyong Yang Liangfan Yu Qianming Zhang |
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| Affiliation: | LAN Xianghua1,YANG Xiaoyong1,2,YU Liangfan3,, ZHANG Qianming3 1 CAS Key Laboratory of Crust-Mantle Materials , Environments,School of Earth & Space Sciences,University of Science & Technology of China,Hefei 230026,China 2 State Key Laboratory of Geological Processes , Mineral Resources,China University of Geosciences,Wuhan 430074,China 3 No.327 Geological Party of Anhui Province,Hefei 230011,China |
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| Abstract: | On the basis of the geological and geochemical studies, including chemical analysis of bulk rocks, rare-earth and trace element studies, fluid inclusion, and S and O isotopic analyses, the authors described the geo-logical background of the deposit in detail and presented significant proofs for the conditions of formation of the Shaxi porphyry copper-gold deposit. Compared with other large and supper-large porphyry copper deposits in China and the adjacent Cu-Au mineralized areas, the ore-forming processes and conditions were analyzed; and the possibil-ity of forming large porphyry copper deposits in the Shaxi area was discussed. The present study indicated that the ore-forming fluid and material were mainly of magmatic origin, while meteoric water played a certain role in the ore-forming processes. Interactions between subducting and overriding plates provided a major driving force for the formation of igneous rocks and the deposition of metal elements in East China since Jurassic. Based on the geo-chemical data of the Shaxi intrusive, it is found that the copper (gold) mineralization is closely related to the genesis of adakite-like intrusive in the Shaxi area. This adakite-like intrusive was formed in the subduction environment as a result of the subduction of the West Pacific plate toward the East China continent, where there is a great potential-ity to form a large porphyry copper deposit. |
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| Keywords: | porphyry copper (gold) deposit S and O isotopes adakite ore-forming process subduction of the West Pacific plate Shaxi |
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