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高喜马拉雅的三维挤出模式
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引用本文:XU Zhi-qin1, WANG Qing2, ZENG Ling-sen1, LIANG Feng-hua1, LI Hua-qi1, QI Xue-xiang1, CAI Zhi-hui1, LI Zong-hai1, CAO Hui1. Three-dimensional extrusion model of the Great Himalaya slice[J]. Geology in China, 2013, 40(3): 671-680(in Chinese with English abstract).
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Author NameAffiliation
XU Zhi-qin1, WANG Qing2, ZENG Ling-sen1, LIANG Feng-hua1, LI Hua-qi1, QI Xue-xiang1, CAI Zhi-hui1, LI Zong-hai1, CAO Hui1 1. State Key Laboratory for Continental Tectonics and Dynamics, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China
2. Department of Earth Science, Nanjing University, Nanjing 210093, Jiangsu, China 
基金项目:国家自然科学基金委创新群体项目(40921001) 和中国地质调查局项目(1212010818094)资助。
中文摘要: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)。
中文关键词:高喜马拉雅杂岩  3-D挤出模式  热碰撞造山
 
Three-dimensional extrusion model of the Great Himalaya slice
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 .
keywords:Great Himalaya Complex  three-dimensional extrusion model  hot collisional orogen
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