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Abstract High-resolution remote sensing technology can greatly enhance the efficiency of investigations into active faults due to its high ability to identify the fine structures of microlandforms. This study presents a systematic summary of the symbols of remote sensing images for active faults. By comprehensively utilizing data from the Landsat8 and GF-2 satellites, as well as previous results and field geological surveys, this study analyzed and examined the active faults in the Maoyaba area of western Sichuan Province through the interpretation of remote sensing images of both macro- and microlandforms. The results show that, besides the Yidun-Litang fault zone, several nearly-W-E-trending normal active faults occur in the study area. Based on this finding, as well as the analysis of the regional geological setting, it can be concluded that crustal materials along the southeastern margin of the Qinghai-Tibet Plateau were continuously squeezed out laterally under the background of the intense collision and compression between the Indian and Eurasian plates, leading to the formation of two conjugate faults: the dextral Batang strike-slip fault and the sinistral Litang strike-slip fault. The joint control of both faults resulted in the local extension of the study area and the formation of nearly-W-E-trending fault structures, which govern the development and evolution of the Damaoyaba Basin, the Xiaomaoyaba Basin, and the Cuopu Basin in the north.
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Keywords
high-resolution remote sensing
interpretation symbol
Litang fault
active fault
Sichuan-Yunnan region
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Issue Date: 03 September 2024
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