龙门山断裂带北段活动特征的遥感地质解译研究

Interpretation of Active Tectonics along the Northern Segment of the Longmenshan Fault Zone from RS Images

文中通过龙门山断裂北段卫星遥感影像的解译分析，对该区活动断裂的分布与发育情况进行了研究。文章选取ETM光学影像和遥感1号雷达影像为主要数据源，结合研究区已有研究成果，分析了遥感影像上地质地貌特征，建立了研究区的解译标志，对龙门山断裂带北段主要断裂（平武-青川断裂、南坝-林庵寺断裂、江油-广元断裂）分布特征与活动性进行了深入的遥感解泽。研究结果表明，平武青川断裂对不同规模的水系位错的影响较大，且广元地区历史地震主要分布在该断裂带上，凶此平武-青川断裂活动性最强，对该区地震的发生起着重要的控制作用。

This paper studies the distribution and activity of faults in the northern segment of The Longmenshan Fault zone utilizing satellite image. ETM optical image and SAR image are chosen as the primary source data to obtain more information and interpret more features of active fault. Firstly, based on the known research of the study area, we analyzed the expression of geological physiognomy and established the symbol for interpretation. Then we analyzed in detail the distribution and character of active faults in the northern segment of the Longmenshan fault zone including the Pingwu-Qingchuan fault, Nanba- Linyansi fault and Jiangyou-Guangyuan fault. From image interpretation, it is concluded that the Pingwu-Qingchuan fault has the strongest activity, which affects significantly the stability of crust and dominates the earthquake of the area.