Tectonic features,genetic mechanisms and basin evolution of the eastern Doseo Basin,Chad

作     者：GAO Huahua DU Yebo WANG Lin GAO Simin HU Jie BAI Jianfeng MA Hong WANG Yuhua ZHANG Xinshun LIU Hao GAO Huahua;DU Yebo;WANG Lin;GAO Simin;HU Jie;BAI Jianfeng;MA Hong;WANG Yuhua;ZHANG Xinshun;LIU Hao

作者机构：China National Oil and Gas Exploration and Development CorporationBeijing 100034China Research Institute of Petroleum Exploration and DevelopmentPetroChinaBeijing 100083China Exploration and Development Research Institute of PetroChina Yumen Oilfield CompanyJiuquan 735019China Research Institute of Bureau of Geophysical Prospecting Inc.CNPCZhuozhou 072751China 

出 版 物：《Petroleum Exploration and Development》 (石油勘探与开发(英文版))

年 卷 期：2023年第50卷第5期

页      面：1151-1166页

核心收录：

学科分类：0820[工学-石油与天然气工程] 070904[理学-构造地质学] 0709[理学-地质学] 07[理学] 0708[理学-地球物理学] 

基　　金：Supported by the PetroChina Science and Technology Project(2021DJ3103) 

主　　题：Doseo Basin Cretaceous unconformity strike-slip fault tectonic inversion genetic mechanism basin evolution 

摘      要：The features of the unconformity,fault and tectonic inversion in the eastern Doseo Basin,Chad,were analyzed,and the genetic mechanisms and basin evolution were discussed using seismic and drilling *** following results are ***,four stratigraphic unconformities,***(Tg),Mangara Group(T10),lower Upper Cretaceous(T5)and Cretaceous(T4),four faulting stages,*** extensional faults,Aptian–Coniacian strike-slip faults,Campanian strike-slip faults,and Eocene strike-slip faults,and two tectonic inversions,*** and end of Cretaceous,were developed in the Doseo ***,the Doseo Basin was an early failed intracontinental passive rift basin transformed by the strike-slip movement and tectonic *** initial rifting between the African and South American plates induced the nearly N-S stretching of the Doseo Basin,giving rise to the formation of the embryonic Doseo rift *** nearly E-W strike-slip movement of Borogop(F1)in the western section of the Central African Shear Zone resulted in the gradual cease of the near north-south rifting and long-term strike-slip transformation,forming a dextral transtension fault system with inherited activity but gradually weakened in intensity(interrupted by two tectonic inversions).This fault system was composed of the main shear(F1),R-type shear(F2-F3)and P-type shear(F4-F5)faults,with the strike-slip associated faults as *** strike-slip movements of F1 in Cretaceous and Eocene were controlled by the dextral shear opening of the equatorial south Atlantic and rapid expanding of the Indian Ocean,*** combined function of the strike-slip movement of F1 and the convergence between Africa and Eurasia made the Doseo Basin underwent the Santonian dextral transpressional inversion characterized by intensive folding deformation leading to the echelon NE-SW and NNE-SSW nose-shaped uplifts and unconformity(T5)on high parts of the *** convergence between Africa and Eu