青藏高原西部湖泊与构造背景关系遥感研究

Research on relationship between lakes and tectonic background in western Tibetan Plateau using remote sensing

利用遥感技术对青藏高原腹地湖泊的大小、形态、数量和空间分布进行了研究,发现大部分湖泊受张性断裂控制。湖泊的形态及空间分布具有非常强的规律性,且与GPS测量数据吻合,反映了区域应力场的现状。不同应力条件下,湖泊的形态和空间分布具有地域性,这种规律体现了各个区域构造背景的差异。青藏高原中部岩石圈物质向SE方向大规模逃逸是大量断陷湖泊形成的重要原因。湖泊分布规律是高原区域构造研究的一个窗口,对地下水的勘查具有一定的指导意义。

It appears that most lakes are controlled by tension faults,as shown by the study of the shapes,size,numbers and distribution of lakes in the hinterland of the Tibetan Plateau using remote sensing. The shapes and distribution of lakes have visible regularity and are in accordance with measurement data of GPS which reflect the conditions of regional stress field. The territorial characteristics of lakes on patterns and distribution in different stress fields constitute an embodiment of different tectonic backgrounds. The fact that the lithosphere matters in middle Tibetain Plateau escaped southeastward might have been an important factor for the formation of a large number of rift lakes. The distribution regularity of lakes is a window to research on tectonics of the Tibetan Plateau,and can be used to supervise the prospecting for groundwater.