Restudy of Evolution of Qiketai- W enjisang-Qiudong Decollement Structural System

Abstract

Abstract: Taibei sag controlled by Mount Bogda is the major depressed area in Tuha basin. It has been in foreland sub-depression area since Jurassic, and formned decollement structural system with vast cap compression, including Qiudong and W enjisang structures in center of the sag and Qiketai thrust belt in the southern slope margin. The Qiudong and W enjisang structures behind the system belong to sliding folds, with special stratigraphic configuration after multi-stage movement since Late Jurassic. This paper determines the stages and thrusting scale of Qiketai thrust belt formation in front of the decollement structural system, which helps to impersonal analysis of the hydrocarbon accumulation within the system.

Key words: Tuha basin, Taibei sag, decollement structure, fold

CLC Number:

P548

LI Cheng-ming, NI Lian-bin, SONG Xue-liang, JIANG Bing, WANG Wen-xia. Restudy of Evolution of Qiketai- W enjisang-Qiudong Decollement Structural System[J]. Xinjiang Petroleum Geology, 2005, 26(4): 377-379.

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Restudy of Evolution of Qiketai- W enjisang-Qiudong Decollement Structural System

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