Geometry and kinematics of Late Cretaceous inversion structures in the Jiuquan Basin, western China
2005; Elsevier BV; Volume: 26; Issue: 2 Linguagem: Inglês
10.1016/j.cretres.2005.01.005
ISSN1095-998X
AutoresBuqing Wang, Hanlin Chen, Shufeng Yang, Ancheng Xiao, Xiaogan Cheng, John A. Rupp,
Tópico(s)Seismic Imaging and Inversion Techniques
ResumoAbstract Late Cretaceous inversion structures, which are significant for oil and gas accumulation, are widely distributed throughout the Jiuquan Basin. These structures are primarily made up of inverted faults and fault-related folds. Most of the axial planes of folds are parallel to inverted faults trending north-east, indicating that the principal stress direction was north-west–south-east in the Late Cretaceous. The average inversion ratios of faults in the four sags that were investigated are 0.39, 0.29, 0.38, 0.32. The average inversion ratio in the Jiuquan Basin is 0.34 and the degree of inversion is moderate to strong. As moderate inversion is suitable for forming excellent hydrocarbon traps, there is considered to be significant potential in the basin for the presence of structural traps.
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