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《Oil & Gas Geology》 2008-03
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Sedimentary characteristics of the Lower Cretaceous and reconstruction of the prototype basin in the Jiuxi Basin

Wang Xiaofeng1,2,Zhang Zhicheng1,Guo Zhaojie1,Zhang Cheng1,Gong Jianye1(1.Key Laboratory of Orogenic Belts and Crustal Evolution in Education Ministry,School of Earth and Space Sciences,Peking University,Beijing 100871,China;2.Exploration Department,Tarim Oilfeild Company,PetroChina,Korla,Xinjiang 841000,China)  
An integrated analysis of depositional characteristics such as paleocurrents and gravel composition of the Lower Cretaceous strata in the Jiuxi Basin,combined with the seismic,logging,and drilling data of Yumen oilfield,proves that Chijinxia mountain and Hei mountain didn't exist in the Early Cretaceous,and the Kuantanshan low uplift(with Kuantan mountain as a part of it) did not separate Jiuxi Basin from Huahai sag due to its small scale and NE-SW-trending long axis.The researches shows that Jiuxi Basin was a rifted basin controlled mainly by NW-SE extension in the early Cretaceous.The basin experienced three stages during its evolution: initiation,growth and die-out,which correspond to the deposition periods of Chijinbao,Xiagou,and Zhonggou formations respectively.
【Fund】: 国家自然科学基金项目(40272085);; 国家重点基础研究发展规划(973)项目(2001CB409804)
【CateGory Index】: P618.13
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