Northwestern margin of Junggar Basin is the richest region of oil and gas in the whole basin. There are several NW tending transverse faults being perpendicular or oblique to the NE-directed Ke-Wu fault. These transverse faults have serious significance for tectonic and hydrocarbon accumulation. By analysing and interpreting the data of topographic image, regional Bouguer gravity anomalies and seismic data, the transverse faults are identified and their characteristics are also analysed. Finally according to the results of the structure modeling experiments, the formation of the transverse faults are investigated. Researches show that firstly, there indeed exists a series of NW-toward transverse faults of different size, distributed in between approximately equal distance; secondly, the structure modeling experiments shows that these transverse faults may be from the X-type conjugate shear faults formed under the tectonic condition of oblique compression or the accommodating faults caused by the difference activities of the main thrust fault. These transverse faults are the associate structure of the Ke- Wu thrust nappe belt, with the properties of strike slip.
Zhang Xiaojie Wang Weifeng Qing Yanbin Hu Yu Shen Yue. Characteristics and the forming mechanisms of transverse faults in northwestern margin of Junggar Basin[J]. Chinese Journal of Geology, 2017, 52(4): 1068-1078.