The Cretaceous tectonic event in the Qiangtang Basin and its implications for hydrocarbon accumulation  

作　　者：Li Yalin Wang Chengshan Li Yongtie Ma Chao Wang Licheng Peng Shaonan 

机构地区：[1]State Key Laboratory of Geological Processes and Mineral Resources Research Center for Tibetan Plateau Geology, China University of Geosciences, Beijing 100083, China [2]Petroleum Exploration and Development Research Institute, PetroChina, Beijing 100083, China

出　　处：《Petroleum Science》2010年第4期466-471,共6页石油科学（英文版）

基　　金：supported by the National Natural Science Foundation of China (40672086);the Ministry of Science and Technology "973" Project (2006CB701400);the Ministry of Land and Resources (XQ2004-06)

摘　　要：The tectonic event during Cretaceous and its relationship with hydrocarbon accumulation in the Qiangtang Basin is discussed based on zircon U-Pb dating and the study of deformation, thermochronology and hydrocarbon formation. LA-ICPMS zircon U-Pb dating indicates that the tectonic event took place during the Early-Late Cretaceous （125-75Ma）. The event not only established the framework and the styles of structural traps in the basin, but also led to the cessation of the first hydrocarbon formation and the destruction of previous oil pools. The light crude oil in the basin was formed during the second hydrocarbon formation stage in the Cenozoic, and ancient structural traps formed during the Cretaceous event are promising targets for oil and gas exploration.The tectonic event during Cretaceous and its relationship with hydrocarbon accumulation in the Qiangtang Basin is discussed based on zircon U-Pb dating and the study of deformation, thermochronology and hydrocarbon formation. LA-ICPMS zircon U-Pb dating indicates that the tectonic event took place during the Early-Late Cretaceous （125-75Ma）. The event not only established the framework and the styles of structural traps in the basin, but also led to the cessation of the first hydrocarbon formation and the destruction of previous oil pools. The light crude oil in the basin was formed during the second hydrocarbon formation stage in the Cenozoic, and ancient structural traps formed during the Cretaceous event are promising targets for oil and gas exploration.

关 键 词：Qinghai-Tibet plateau Qiangtang Basin tectonic event CRETACEOUS hydrocarbon accumulation 

分 类 号：P618.130.2[天文地球—矿床学] P542[天文地球—地质学]