| 摘要 |
<p>PURPOSE: To obtain a detection method in which the level of an analysis is enhanced sharply by a method wherein the position of the boundary of a geological feature, that of a fault fracture belt and that of an open crevice are detected, the numerical value of a fracture degree and that of an opening degree are evaluated and their planar continuous state including a surface-layer geological feature having a feature is analyzed. CONSTITUTION: The distribution of P0 values is drawn on the basis of values measured at an interval of 2m in every 200m in three measuring lines which are parallel on the bottom of the sea at a depth of about 20 to 30m. Fault fracture belts at a threshold Pt of±9% are indicated by black triangles, their fracture degrees are indicated by numerals, opening crevices are indicated by black circles, their opening degrees are indicated by numerals, and surface-layer geological features at a threshold or lower are indicated by circular marks. In parts in which the relative value of P0 in which the surface-layer geological features have been changed is comparatively large, the measuring lines are connected by dotted lines. When a distribution state in a plane up to both ends of the measuring lines is observed, a deformation due to a structural motion is displayed well in such a way that the running of the dotted lines is remarkably different at the right and the left when a left large-scale fault fracture belt is used as a boundary, that the running at the right shrinks as it advances downward, that a fracture degree and an opening degree are large at the upper part on the left of the fracture belt, that they disappear in the central part and that they become large values at the lower part on the right.</p> |
