関東平野の基盤構造と重力異常 (1)

基盤深度図

抄録

In order to detect buried faults under the plain and to estimate the activity of active faults, the structure of basement under the Kanto Plain was studied by the synthetic analysis of explosion seismic data, gravity anomaly data and deep test well data.
The depth of basement undulate in the western part; the depth of basement exceeds 3500 meters at the deepest point and is shallower than 1000 meters at the shallowest point. In the central part, the basement is comparatively flat and the average depth is about 3000 meters. The depth of basement in the western part shallows monotonously northeastward. Some dome structures, graben structures and fault like structures were detected under the Kanto Plain.