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《GEOSCIENCE》 1999-01
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NEGATIVE INVERSION STRUCTURES AND GEOLOGICAL SIGNIFICANCE OF NORTHERN UPLIFT,THE TARIM BASIN,NORTHWESTERN CHINA

Tang Liangjie Jin Zhijun Zhang Yiwei Lu Kezheng(University of Petroleum, Beijing, 102200)  
The negative inversion structure belts in northern uplift of the Tarim Basin are located at fore bulge of Kuche foreland depression and elongate more than 200km long and 10~30km wide. The main styles of negative inversion structures include major negative inversion faults, inversion tilted fault blocks and horst graben type superimposed inversion structures. The major negative inversion faults in northern Tarim uplift involved basement sequences ordinarily and experienced thrusting in the stage of pre Cretaceous and inversion process since Cretaceous, just like Luntai and Yaha fault belts. The results of balanced cross section analysis indicate that the main inversion phase may be Cretaceous Tertiary, which match the stage of trap and oil gas pool formation. The genetic mechanism of negative inversion structures of northern Tarim uplift are controlled by pre existing basement weak zone and local extensional stress field resulting from the bent upward of fore bulge. The formation and distribution of oil gas pools in northern Tarim uplift are controlled by negative inversion structures which are with important significance for revealing structural deformation type and pattern in the northwest China.
【Fund】: 中国博士后科学基金
【CateGory Index】: P542
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