CHARACTERISTICS OF GRAVITY FIELD IN THE HEFEI BASIN

The geologic structures is very complex and the surface is a crisscross network of gullies in the Hefei Basin. The basement, faults and structural framework of the basin were revealed in accordance with the object-oriented processing of gravity anomaly. The basin can be divided into four different structural belts,i.e., the foreland thrust fold belt, the Shucheng foredeep belt, the Liu'an fore-bulge fault-wrench belt and the Feibei back-bulge slope belt based on integrated gravity,magnetic, electric and seismic data. The prospects for petroleum exploration in the basin were briefly discussed.