地质学报（英文版）2009，Vol.83Issue(2)：347-358,12.
Structural Evolution of the Eastern Qiulitagh Fold and Thrust Belt, Northern Tarim Basin, China
Structural Evolution of the Eastern Qiulitagh Fold and Thrust Belt, Northern Tarim Basin, China
摘要
Abstract
The eastern Qiulitagh fold and thrust belt (EQFTB) is part of the active Kuqa fold and thrust belts of the northern Tarirn Basin. Seismic reflection profiles have been integrated with surface geologic and drill data to examine the deformation and structure style of the EQFTB, particularly the deformational history of the Dina 2 gas field. Seismic interpretations suggest that Dongqiu 8 is overall a duplex structure developed beneath a passive roof thrust, which generated from a tipline in the Miocene Jidike Formation, and the sole thrust was initiated from the same Jidike Formation evaporite zone that extends westward beneath the Kuqatawu anticline. Dongqiu 5 is a pop-up structure at the western part of the EQFTB, also developed beneath the Jidike Formation evaporite. Very gentle basement dip and steep dipping topographic slope in the EQFTB suggest that the Jidike Formation salt provides effective decoupling. The strong deformation in the EQFTB appears to have developed further south, in an area where evaporite may be lacking. Since the Pliocene, the EQFTB has moved farther south over the evaporite and reached the Yaken area. Restoring a balanced cross-section suggests that the minimum shortening across the EQFTB is more than 7800 m. Assuming that this shortening occurred during the 5.3 Ma timespan, the shortening rate is approximately 1.47 ram/year.关键词
Qiulitagh fold and thrust belt/Tarim Basin/northwestern ChinaKey words
Qiulitagh fold and thrust belt/Tarim Basin/northwestern China分类
天文与地球科学引用本文复制引用
YANG Minghui,JIN Zhijun,LU Xiuxiang,SUN Dongsheng,TANG Xuan,PENG Gengxin,LEI Ganglin..Structural Evolution of the Eastern Qiulitagh Fold and Thrust Belt, Northern Tarim Basin, China[J].地质学报（英文版）,2009,83(2):347-358,12.基金项目
This study was financially supported by the National Major Fundamental Research and Development Project of China(no.:19990433). （no.:19990433）
