DISCUSSION ON STRUCTURE OF CRUST AND UPPER MANTLE AND POTENTIAL FOCAL REGION IN BADALING AND ITS NEIGHBORHOOD

The Seis83 programs were used in order to calculate the DSS data of Daxing Yanqing section in Yanshan Daxing Yanqing profile.The structure of crust and upper mantle was obtained in Badaling and its neighborhood.The result shows that in the region,faults well developed and there is much difference in thickness of deposition layer in the shallow crust,crust structure is heterogeneous in crosswise and undulate changes of crust interface and velocity isopleth are obvious in depths,low velocity blocks exist in the partial crust.The depth of Moho discontinuity in Daxing is about 34.5 km and that in Juyongguan is about 38.5 km.A fault of Moho exists in vicinity of Yanqing.