Understanding the Deep Structure in Loesscovered Area Based on Integrated Geophysical Techniques, a Case Study

摘要

Underground structure of west edge of Erdos basin is complicated by formation and evolution of intersectant rifts of Qinling, Qilianshan and Helanshan. It is hard for seismic survey to get qualified data due to large terrain fluctuation with large variation in loess thickness. Gravity survey and CEMP (Continue Electromagnetic Profile) survey have been conducted in the western edge of Erdos basin in recent years. Huge thickness loess-covered, large terrain fluctuation and large variation in loess thickness are the key factor influencing data processing and interpretation. To tackle these problems, we adopt new techniques for correcting gravity response to loess and static displacement over CEMP data. In this way, we have gotten good processing results for further comprehensive analysis and interpretation, playing a good rule in optimum selection of exploration targets.