| 试论幔柱构造与成矿系统——以三江特提斯成矿域为例 |
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| 引用本文：.1998.A tentative discussion on the mantle plume tectonics and metallogenic system as exemplified by the Sanjiang tethyan metallogenic domain[J].Mineral Deposits,17(2):97~113 |
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| 基金项目:地质矿产部跨世纪人才基金项目（9616） |
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| 中文摘要:以三江特提斯成矿域为例，简述了幔柱构造特征，提出了“幔柱构造成矿体系”新观点。研究表明，热幔柱发育演化，导致大陆岩石圈向大洋岩石圈构造体制转化，伴随大陆活化、减薄、去根、张裂、解体和成洋诸事件；冷幔柱形成演变，导致大洋岩石圈向大陆岩石圈构造体制转变，并引发俯冲造山→碰撞造山→陆内造山过程。在幔柱构造制约下，一系列形成于不同构造背景、产出不同地质环境、具有不同成矿体制、不同序次组合和不同成矿类型的矿床成矿系列组合和矿床成矿谱系，共同构成统一的成矿体系。热幔柱成矿体系包括热幔柱热点和热幔柱-扩张脊2大次级成矿系统，冷幔柱成矿体系包括冷幔柱-俯冲造山、冷幔柱-碰撞造山和冷幔柱-陆内造山3大次级成矿系统。最后，按成矿体系，成矿系列和矿床三级体制对三江特提斯成矿域主要矿床形成条件和成矿规律进行了全新分析。 |
| 中文关键词:幔柱构造、成矿系统、三江特提斯成矿域 |
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| A tentative discussion on the mantle plume tectonics and metallogenic system as exemplified by the Sanjiang tethyan metallogenic domain |
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| Abstract:Exemplified by the Sanjiang Tethyan metallogenic domain, the present paper has briefly described characteristics of the mantle plume tectonics, and advanced the new viewpoint of "metallogenic system controlled by mantle tectonics ". Studies show that the development and evolution of the hot mantle plume lead to the conversion of tectonic system from the continental lithosphere to the oceanic lithosphere, accompanied by such events as activation, thinning, derooting, tensional faulting and disintegration of the continent and the formation of the ocean, whereas the formation and evolution of the cold mantle plume result in the conversion of tectonic system from the oceanic lithosphere to the continental lithosphere and give rise to the process of subduction orogeny→collision oroge.ny→inlraconlinental orogeny. Controlled by the mantle plume tectonics, a series of metallogenic series associations and metallogenic spectrum of mineral deposits, formed in different tectonic settings and geological environments and characterized by different sequence associations and differnet ore-forming types, have constituted a unified metallogenic system. The hot mantle plume metallogenic system includes two major metallogenic sub-systems, i.e., hot mantle plume-hot-spot and hot mantle plume-spreading ridge, whereas the cold mantle plume metallogenic system includes three major metallogenic sub-systems, namely cold mantle plume-subduction orogeny, cold mantle plume-collision orogeny and cold mantle plume-intracontinentaI orogeny. Finally, a completely new analysis of ore-forming conditions and metallogenic regularity of main mineral deposits in the Sanjiang Tethyan metallogenic domain is made in accordance with the three-level system composed of metallogenic system, metallogenic series and mineral deposit. |
| keywords:mantle plume tectonics , metallogenic system, Sanjiang Tethyan metallogenic domain |
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