Interpretation Of South-hasi-mountain Active Fault Zone Based On Domestic High Resolution Remote Sense Image

China has a series of high-resolution satellites in orbits, such as GF-1, GF-2, ZY-3, etc. Comparing with foreign high-resolution remote sensing satellites, domestic satellites also have the same characteristics of high spatial resolution and high temporal resolution, and their data has a wide coverage and is available free. However, the existing reports about the domestic high-resolution satellite data used in the field of quantitative studies of active tectonics are not many. In this report, the stratigraphic distribution, fault geometry, nature of fault activity, accumulated dislocation and co-seismic deformation of a part of Haiyuan fault zone in the southHasi Mountain were investigated and analyzed by the GF-1,GF-2 and ZY-3 satellite image data via using the remote sensing interpretation and field verification survey. The river system morphology and the relationship between the river system density and tectonic activities of this area were also analyzed. Consequently,the ratio of 1: 50,000 and 1: 200,000 remote sensing interpretation maps were drawn respectively for investigating the geologic structure of study areas. The newest domestic highresolution remote sensing satellite images were used in this study, and its properties were evaluated by comparing with foreign high-resolution remote sensing satellite images through using the data applicability, interpretation effect and application effect in active tectonic quantitative studies. In conclusion, the fault zone in south-Hasi Mountain was a quaternary active fault zone, existed noticeably horizontal movement. The distribution and feature of river system morphology and density between both sides of fault zone confirmed the left-lateral horizontal activities. River system displacement measurement presented the Holocene sinistral strike-slip was about 333.5 meters. Domestic high-resolution satellites provides a variety of different resolution image data, for instance, GF-1 image data with 16 m medium resolution is suitable for 1:200,000 medium-scale mapping; GF-1 image data with 2m or 1m high resolution is applicable to 1:50,000 large-scale mapping. During the active tectonic quantitative studies, interpretation effect of GF-1 and GF-2 image data was close or even exceed to the same type of foreign high-resolution remote sensing satellites, and their data was also characteristics of high temporal resolution, low cost and data easy obtainment, etc, so that they have a strong application value, and can be replaced same resolution foreign remote sensing satellite images during the active tectonic quantitative studies and the ratio 1: 50,000 large-scale mapping.