Abstract: Based on the field survey and combined with the results interpreted from the artificial seismic exploration along the line between Karamay and Emin, the basic structural model of basin-range coupling along the northwestern margin of Junggar basin is discussed, showing that in section, it is a large double-thrust system with great complexity; in plane, this NE-trending structural zone is separated into 3 segments and 12 sub-segments by the segmentation indications proposed in this paper. The comparison between sedimentation and tectonic feature for different segments suggests that the thickness of sediment layers varies greatly in the sedimentary cap rocks; the tectonic segmentation of front thrust belt behaves both in time and in space, which exhibits not only in 3 segments, but also in 12 sub-segments. Finally, the relation between the oil-gas fields and the basin-range coupling structural model is discussed, pointing out that NW-trending cross fault and the 3rd NE-trending structural belt are of important significance in oil-gas potential prediction in this area.

Key words: Junggar basin, basin-range coupling, segmentation