E018 Understanding the Deep Structure in Loesscovered Area Based on Integrated Geophysical Techniques a Case Study L. Zheng* (BGP CNPC) L.S. Ji (BGP CNPC) Y.Y. Meng (BGP CNPC) & S.J. Hao (BGP CNPC) SUMMARY 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


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