Wuerhe-Xiazijie Strike-Slip Structure and Petroleum Exploration Significance in Northwestern Margin of Junggar Basin

Abstract

Abstract: New structural studies and 2-D and 3-D seismic profiles reveal that in the Upper Paleozoic-Mesozoic in western Junggar basin develop Dalabute strike-slip fault and Karamay-Xiazijie fault belt. The former assumes normal flower-shaped structures, the latter develops right strike-slip structures which form en echelon arrangement of Wuerhe antiline, Xiazijie anticline, high angle-dipping shear faults. In Late Paleozoic-Mesozoic the northwestern margin of Junggar basin occurred strike-slip movement dominated by right shear and overthrust structures, shaping the strike-slip faults and shear fault dogleg folds. This could deny the previous long-time idea of that in the northwestern margin of Junggar basin developed overthrust nappe structure. It is the collision between Cenozoic India plate and Eurasia that caused the reactivation of Dalabute fault along left strike-slip, while Karamay-Xiazijie fault belt was not activated in Cenozoic.

Key words: Junggar basin, Wuerhe-Xiazijie, en echelon anticline, Dalabute strike-slip fault

CLC Number:

TE111.1

ZHANG Yue-qian, WANG Xin, LIU Ji-shan, LIANG Han, LI Zhen-hua, WANG Ren-fu. Wuerhe-Xiazijie Strike-Slip Structure and Petroleum Exploration Significance in Northwestern Margin of Junggar Basin[J]. Xinjiang Petroleum Geology, 2011, 32(5): 447-450.

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