关键词: 天山, 逆断层, 褶皱带, 隐伏断坡

Abstract: The reverse fault fold zones in the foreland basin of northern Tianshan is a typical active compression area in interior of continents. The research of the surface and deep structure,and its relationship in the active compression tectonic region is extremely important for the understanding its seismogenic structure and dividing its potential earthquake sources. On the basis of detailed research on the major active tectonics and synthetical studies in northern Tianshan,the deformation of the structure,earthquakes and active tectonics,and the relationship between surface and deep structures have been discussed in this paper. Finally,a few questions have been put forward in the process of potential earthquake source dividing in the active compression tectonic belt. Based on the research of the 1906 Manas earthquake (M7.7) and paleoearthquakes on the active reverse faults,we can know that the blind active crust ramp under the piedmont in the northern Tianshan area is the place of large earthquake occurring,and divided the blind ramp into two segments at the Jinguohe area. The active blind crust ramp may have two large potential earthquake (M8.0) sources. There are eight active anticlines in the northern Tianshan,west Urumqi. We can also compare these active anticlines with the active folds in the west region of the United States of America,and conclude that these active anticlines can only produce some middle earthquakes (M6.0). All the active anticlines in the northern Tianshan,west Urumqi,may have eight potential earthquake sources.

Key words: Tianshan, Reverse fault, Fold zone, Blind ramp