| 俄罗斯阿尔泰-Sayan地区Aksug斑岩Cu-Mo体系的地质与地球化学特征 |
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| 作者姓名： | Berzina AN Berzina AP |
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| 作者单位： | Institute of Geology and Mineralogy, Koptyug Avenue, 3, Novosibirsk 630090, Russia |
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| 基金项目： | This research was funded by Russian Foundation for Basic Research (grant 06-05-64254) and China National Science and Technology Supporting Program (2006BAB07B08) |
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| 摘 要： | The Aksug deposit, located in Altay-Sayan region of Russia, is one of the largest porphyry Cu-Mo deposits in Southern Siberia. The ore-bearing porphyries of the Aksug porphyry Cu-Mo system were formed in post-collisional environment. Geochemically they belong to calk-alkaline and high K-calk-alkaline series. Rocks are characterized by enrichment of LILE and depletion of HSFE and HREE, showing the importance of subduction-related components in magma generation. Large plutonic intrusions that host porphyry systems have been formed during collision. The origin of porphyritic rocks is dominantly the mantle with lower crustal contribution. The mainly economically important Cu-Mo mineralization is closely related to a porphyry series in time and space, being emplaced towards the end of magmatic activity. Though the emplacement of plutonic and ore-bearing porphyry complexes took place in different geodynamic environments, both complexes are characterized by certain similarity in geochemical composition, alkalinity, trace element content, Sr isotopic composition. This fact evidently indicates a common deep-seated magmatic source (at the lower crust-upper mantle level). Low initial 87 Sr/86 Sr, sulfur isotopic characteristics and presence of PGE-Co-Ni mineralization in associated pyrite-chalcopyrite ores suggest that mantle source of chalcophile elements was of high importance in porphyry Cu-Mo mineralization of the Aksug deposit.
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| 关 键 词： | Porphyry Cu-Mo deposits Aksug Siberia Russia |
| 收稿时间： | 2008/9/17 0:00:00 |
| 修稿时间： | 2008/10/25 0:00:00 |
Geological and geochemical characteristics of the Aksug porphyry Cu-Mo system, Altay-Sayan region, Russia |
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| Berzina AN,Berzina AP.Geological and geochemical characteristics of the Aksug porphyry Cu-Mo system, Altay-Sayan region, Russia[J].Acta Petrologica Sinica,2008,24(12):2657-1668. |
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| Authors: | Berzina AN and Berzina AP |
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| Institution: | Institute of Geology and Mineralogy, Koptyug Avenue, 3, Novosibirsk 630090, Russia |
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| Abstract: | The Aksug deposit, located in Altay-Sayan region of Russia, is one of the largest porphyry Cu-Mo deposits in Southern Siberia. The ore-bearing porphyries of the Aksug porphyry Cu-Mo system were formed in post-collisional environment. Geochemically they belong to calk-alkaline and high K-calk-alkaline series. Rocks are characterized by enrichment of LILE and depletion of HSFE and HREE, showing the importance of subduction-related components in magma generation. Large plutonic intrusions that host porphyry systems have been formed during collision. The origin of porphyritic rocks is dominantly the mantle with lower crustal contribution. The mainly economically important Cu-Mo mineralization is closely related to a porphyry series in time and space, being emplaced towards the end of magmatic activity. Though the emplacement of plutonic and ore-bearing porphyry complexes took place in different geodynamic environments, both complexes are characterized by certain similarity in geochemical composition, alkalinity, trace element content, Sr isotopic composition. This fact evidently indicates a common deep-seated magmatic source (at the lower crust - upper mantle level). Low initial 87Sr/86Sr, sulfur isotopic characteristics and presence of PGE-Co-Ni mineralization in associated pyrite-chalcopyrite ores suggest that mantle source of chalcophile elements was of high importance in porphyry Cu-Mo mineralization of the Aksug deposit. |
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| Keywords: | Porphyry Cu-Mo deposits Aksug Siberia Russia |
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