The study on the near surface structure in Yinken Steppe desert using GPR method

摘要

The desert study is helpful for understanding of regional land surface changes and paleoenvironment. The use of ground penetrating radar (GPR) for desert area exploration has its advantages, but the detection depth of former GPR is usually shallow. This paper we will use the GPR data gathered by the equipment of Key Laboratory of Electromagnetic Radiation and Sensing Technology (Chinese Academy of Science) in Yinken Steppe Desert, in the northeast margin of Hobq desert, Inner Mongolia. Combined with shallow rocks identification and relative dielectric constant measurement we get its near surface structure. The dry and wet sand interface is obtained at a depth of about 80 meters. The upper part might be aeolian sands, while the lower part consists of sands of Lake Facies. With the relevant geological and geography information, it can be concluded that the wet sand area is affected by groundwater and paleoenvironment. The paleoclimate of Quaternary Holocene in the region might dominated by drought weather with no large river passed.