Abstract:

Basement tectonic framework can be deduced by utilizing comprehensive information. Research result in the paper indicates seismic belts and seismic points locate at Moho steepness belt, low velocity layer steepness belt, gravity linear structure, gravity ring structure, or the intersection point of gravity linear structures, and their distributions are also consistent with the distribution of ground water, hot spring and radioactive uranium mines; river system in the country relates closely to the linear structure; while lakes locate at the intersection points of these linear structures. With these reles, the seismic can be zoned to delineate safe area and safety island, thus provides a strong scientific basis for our country's urban constructions and suitable distributions of major construction projects.

Key words: geophysical prospecting, comprehensive information, basement tectonic framework, seismic zoning, safe area and safety island