星载InSAR技术在西藏崩错地区构造地貌研究中的应用

利用ERS-1/2雷达卫星数据,通过合成孔径雷达干涉测量技术,提取了西藏崩错地区的数字高程模型(DEM),得到的ERS-1/2DEM在反映微地貌特征时明显优于中国1/25万DEM和2004年美国公布的90m分辨率的SRTMDEM。基于ERS-1/2DEM对崩错断层带进行地貌分析发现:在崩错断层带和蓬错断层带的交接部位地貌特征复杂,一类似于蓬错断层带的构造地貌穿过了崩错断层带上达孜-打沙断层,在这一位置达孜-打沙断层切过冲沟,表明达孜-打沙断层的这个段落在近期内活动过,同时被达孜-打沙断层切穿的冲沟切断了那卡-纳堆多断层,说明那卡-纳堆多断层比达孜-打沙断层形成时间要早

APPLICATION OF SPACEBORNE SYNTHETIC APERTURE RADER INTERFEROMETRY ON MORPHOTECTONIC RESERCH IN BENGCUO AREA OF TIB

Using ERS-1/2 radar satellite data, we generated the Digital Elevation Model by Interferometric Synthetic Aperture Radar, and the ERS-1/2 DEM that we generated is obviously superior to the 1/25 ten thousand-scale DEM of the National Fundamental Geographic Information System of China and the 90 meter spatial resolution's SRTM DEM that America published in 2004 when it shows the characteristics of tiny structure relief. By analyzing the relief characteristics of Bencuo fault zone based on ERS-1/2 DEM, we found that the relief on the connection location of Bengcuo and Pengcuo fault zones had complex characteristics. A structure relief that is similar to Pengcuo fault zone crossed through Dazi-Dasha fault on Bengcuo fault zone, while Dazi-Dasha fault crossed through a gully at this place. This indicated that Dazi-Dasha fault was active at this place in recent time, at the same time, Naka-Naduiduo fault severed by the gully which was cut through by Dazi-Dasha fault. Therefore, Naka-Naduiduo fault is formed earlier than Dazi-Dasha fault.