| 中国前寒武纪铜矿成矿特征 |
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| 引用本文：.2004.Metallogenic Characteristics of Precambrian Copper Deposits in China[J].Mineral Deposits,23(Z):90~98 |
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| 基金项目:中国地质调查局地质调查项目（编号：K1.4-3-1） |
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| 中文摘要:前寒武纪是中国铜成矿作用的一个重要时期，该时期形成的铜矿占中国铜矿的24.4%，它们位于前寒武纪陆块边缘的裂陷带。矿床类型按容矿岩原岩的岩性主要有沉积岩型、火山岩型、基性-超基性岩型及斑岩与火山岩的过渡型，它们分别占前寒武纪铜矿的34.4%、26.5%、20.6%及18.5%，未见夕卡岩型铜矿。矿化类型主要有Cu-Zn型、Cu-Co型、Cu-Ni-Co型、Cu-Pb-Zn型、Cu-Fe型及 Cu-Mo型。未发现Cu-Au-U型（奥林匹克坝型）及太古宙的 Cu-Ni-Pt型（与科马提岩有关）。成矿时代为新太古代-新元古代（2 700~658 Ma），且华北陆块中的铜矿主要形成于新太古代中元古代，而扬子陆块中的铜矿主要形成于古元古代-新元古代。 |
| 中文关键词:铜矿 成矿作用 前寒武纪 中国 |
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| Metallogenic Characteristics of Precambrian Copper Deposits in China |
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| Abstract:Precambrian is an important copper metallogenic epoch in China. Copper deposits formed in this period account for 24.4% of China’s total copper reserves. Among them Proterozoic deposits make up 23.5% and Archean ones 0.9%. They are located in aulacogens on margins of Precambrian continental blocks. According to the protolith lithology of host rocks, copper deposits may be classified into sedimentary, volcanic, basic-ultrabasic and porphyry-volcanic transitional types, which constitute 34.4, 26.5, 30.6 and 18.5% of Precambrian copper deposits, respectively. Mineralizations mainly include Cu-Zn, Cu-Co, Cu-Pb-Zn, Cu-Fe, and Cu-Mo types. Up till now, Cu-Au-U type (Olympic Dam type) and Archean Cu-Ni-Pt type (related to komatiites) have not been found yet. Ore-forming processes lasted from Neoarchean to Neoproterozoic (2 700~658 Ma BP). Copper deposits in the North China block were mainly formed from Neoarchean to Mesoproterozoic, whereas those in the Yangtze block are mainly products of Paleoproterozoic-Neoproterozoic. |
| keywords:copper deposits, metallogenesis, Precambrian, China |
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