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    许志琴, 王勤, 曾令森, 梁凤华, 李化启, 戚学祥, 蔡志慧, 李忠海, 曹汇. 高喜马拉雅的三维挤出模式[J]. 中国地质, 2013, 40(3): 671-680.
    引用本文: 许志琴, 王勤, 曾令森, 梁凤华, 李化启, 戚学祥, 蔡志慧, 李忠海, 曹汇. 高喜马拉雅的三维挤出模式[J]. 中国地质, 2013, 40(3): 671-680.
    XU Zhi-qin, WANG Qing, ZENG Ling-sen, LIANG Feng-hua, LI Hua-qi, QI Xue-xiang, CAI Zhi-hui, LI Zong-hai, CAO Hui. Three-dimensional extrusion model of the Great Himalaya slice[J]. GEOLOGY IN CHINA, 2013, 40(3): 671-680.
    Citation: XU Zhi-qin, WANG Qing, ZENG Ling-sen, LIANG Feng-hua, LI Hua-qi, QI Xue-xiang, CAI Zhi-hui, LI Zong-hai, CAO Hui. Three-dimensional extrusion model of the Great Himalaya slice[J]. GEOLOGY IN CHINA, 2013, 40(3): 671-680.

    高喜马拉雅的三维挤出模式

    Three-dimensional extrusion model of the Great Himalaya slice

    • 摘要: 提要:作为喜马拉雅造山带变质核的高喜马拉雅杂岩带,是以高级变质岩石、普遍的深熔反应以及高温韧性变形为主要特征的热碰撞造山带。在高喜马拉雅平行造山的韧性伸展构造发现的基础上,建立高喜马拉雅挤出的3-D 构造模式,并提出了挤出的动力学过程: (1)造成高喜马拉雅中弱和热物质产生的局部熔融阶段 (46~35 Ma),(2) 平行造山的韧性伸展和重力裂陷阶段(28~26 Ma开始),(3)韧性逆冲型剪切带形成阶段(>626~23 Ma), (4) MCT 和STD的形成造成的高喜马拉雅挤出阶段(23~17 Ma)。

       

      Abstract: Abstract:The Greater Himalayan Complex (GHC) , as the metamorphic core of the Himalayan orogen, shows a “hot” collisional orogen characterized by high-grade (up to granulite facies) metamorphic rocks exhumed from the middle-lower crust, widespread migmatites from extensive anatectic processes and high-temperature ductile deformation. A three-dimensional tectonic model for extrusion of the GHC has been proposed based on the discovery of widespread orogen-parallel ductile extension. It is suggested that extrusion dynamic processes of the GHC are as follows: (1) partial melting in 45-36Ma resulting in the weak and hot middle crust, (2) orogen-parallel gravitational collapse in 28-26Ma, (3) ductile thrusting since > 26 Ma and (4) ductile extrusion resulting from the formation of MCT and STD during 23-17Ma .

       

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