| 新疆磁海铁（钴）矿床次火山热液成矿学 |
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| 引用本文：.2000.Subvolcanic hydrothermal metallogeny of the Cihairon (Cobalt) deposit , Xinjiang[J].Mineral Deposits,19(2):156~165 |
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| 基金项目:冶金部西北地勘局科研协作项目 |
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| 中文摘要:磁海铁（钻）矿床颇具特色，以“石榴石-透辉石-磁铁矿”为基本矿石建造；成矿作用发生在早二叠幽：北山裂陷作用和火成活动晚期，以基性次火山岩浆期后富铁流体的f交代）充填为成矿方式，矿体产于辉绿岩体原生裂隙系统；成矿流体的化学演化具有典型（火山）岩浆期后热液演化特点，形成了一系列热液蚀变体，其中石榴石透辉石岩有别于传统理解的“夕卡岩”：成矿物质源于碱性玄武岩浆，基性次火山岩浆多次脉动式入侵是矿床形成的必要条件。文章较系统阐明了磁海矿床的成矿地质地球化学特征，证实了它的次火山热液成矿特征。 |
| 中文关键词:石榴石-透辉石-磁铁矿 次火山热液 铁(钴)矿床 新疆磁海 |
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| Subvolcanic hydrothermal metallogeny of the Cihairon (Cobalt) deposit , Xinjiang |
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| Abstract:The Cihai iron (cobalt) deposit has some unique characteristics. The garnet-diopside magnetite association is the fundamental ore form ation: the metallogenesis was finished in late stage of Early Permian rift faulting and magmatism in Beishan area, and the basic subvolcani magmatic hydrothermal ( alteration) filling was its metallogenic pattern, with orebodies appearing in primitive cracks of diabase. The inorganic chemical evolution of the m etallogenic fluid shows the typical feature of magnatic hydrothermal process, forming a series of alteration bodies, within which garnet diopsiderock is different from the traditional skarn.The metallogenic material was from deep alkalic basaltic magma, and the pulsatory invasion was the necessary metallogenic condition of the ore deposit. This paper describes the geological and geochemical features of the ore deposit and proves its subvolcanic hydrother malmetallogenesis. |
| keywords:garnet-diopside-m agnetite, subvolcanic hydrothermal fluid, iron ( cobalt) deposit, Cihai, Xinjiang |
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