Timing,scale and mechanism of the destruction of the North China Craton

查看全文 作　　者：ZHU [1]RiXiang;CHEN [1]Ling;WU [1]FuYuan;LIU [2]JunLai

机构地区：[1]State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;[2]State Key Laboratory of Geological Processes and Mineral Resources, China University ofGeosciences, Beijing 100083, China

出　　处：《Science China Earth Sciences》索引2011年第54卷第6期,共9页

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 90814000,90814002) 摘　　要：The North China Craton (NCC) is a classical example of ancient destroyed cratons.Since the initiation of the North China Craton Destruction Project by the National Natural Science Foundation of China,numerous studies have been conducted on the timing,scale,and mechanism of this destruction through combined interdisciplinary research.Available data suggest that the destruction occurred mainly in the eastern NCC,whereas the western NCC was only locally modified.The sedimentation,magmatic activities and structural deformation after cratonization at ~1.8 Ga indicate that the NCC destruction took place in the Mesozoic with a peak age of ca 125 Ma.A global comparison suggests that most cratons on Earth are not destroyed,although they have commonly experienced lithospheric thinning;destruction is likely to occur only when the craton has been disturbed by oceanic subduction.The destruction of the NCC was coincident with globally active plate tectonics and high mantle temperatures during the Cretaceous.The subducted Pacific slab destabilized mantle convection beneath the eastern NCC,which resulted in cratonic destruction in the eastern NCC.Delamination and/or thermal-mechanical-chemical erosion resulted from the destabilization of mantle convection. 关键词：克拉通化破坏机制中国国家自然科学基金会对流不稳定时序地幔对流华北东部

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Timing,scale and mechanism of the destruction of the North China Craton

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