The Qiultaq anticline belt lies to the front of the Kuqa fold-and-thrust belt along the south piedmont of the Tianshan Mountains. In order to better understand the structural style variation and its effect on hydrocarbon accumulation along the strike of the Qiultaq anticline belt, both structural style and stratigraphy of different parts of the belt were investigated in details. The synthesized structural analyses demonstrated that the stratigraphic configuration varied along the strike of the belt. The paper proposed that the stratigraphy played an important role in the variations in deformation style. Several different detachments were identified along the Qiultag anticline belt, and their location and extent were controlled by stratigraphy. Vertically, these detachments acted as an interface, separating the strata into the upper and the lower deformed stratigraphic successions. Laterally, the detachments changed rapidly, which resulted in a corresponding transformation in the deformational styles. The change and dying-out of detachments with depth was responsible for the forming of oblique/lateral ramps and terminated folds in the lower deformed stratigraphic sussession. In addition, the formation of hydrocarbon reservoirs was also largely controlled by the stratigraphic variation, so that the reservoir-formation characters were obviously different between the eastern and western parts of the Qiultag anticline belt.
Miao Jijun,Jia Chengzao,Wang Zhaoming et al. STRATIGRAPHIC CONFIGURATION CONTROL ON TECTONIC DEFORMATION ALONG THE QIULTAG ANTICLINE BELT OF KUQA AREA, NORTHERN TARIM BASIN[J]. Chinese Journal of Geology, 2005, (4): 558-569.