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Fault Activity and Its Controlling to Marine Cratonic Breakup in Tarim Basin

REN Jian-ye 1,2 ,YANG Huai-zhong3,HU De-sheng4,ZHANG Jun-xia5,WANG Shan6 1.KeyL aboratory of Tectonics and Petroleum Resources of Ministry of Education,ChinaU niversity of Geosciences,Wuhan 430074,China 2.Structural Research Center of Oil and Gas Bearing Basin of Ministry of Education,Wuhan 430074,China 3.CNOOC Research Institute,Beijing 100027,China 4.Zhanjiang Company,CNOOC,Zhanjiang 524000,China 5.School of Economics and Management,China University of Geosciences,Wuhan 430074,China 6.Faculty of Earth Resources,China University of Geosciences,Wuhan 430074,China  
Based on elaborate geological structural interpretation of seismic profiles,this paper analyzes in details the controlling of fault activity to development of central uplift zone and marine cratonic evolution of Tarim basin.The research indicates that there are mainly three episodes of fault systems:the middle Caledonian orogeny I episode,the middle Caledonian orogeny II episode and the mid-late Himalayan(since Late Miocene).These fault systems controlled the tectonic evolution of central uplift zone and migration of upliftsag,in which Bachu uplift experienced back-bulge ramp in the mid-late of Caledonian period,forebulge in the Hercynian-Yanshanian period and the latest compressional fault uplift in the mid-late of Himalayan period,Tazhong uplift started at the first episode of Caledonian period and formed at the second episode of Caledonian period and Tadong uplift started and formed at the second episode of Caledonian period.The evolution of marine cratonic basin is divided into three periods which are formation,disintegration and extinction. Analysis shows that the fault system of Caledonian I and Caledonian II episodes resulted in breakup of Tarim marine cratonic basin.
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