| 講演要旨(和文) | | 静岡市の三保半島先端陸域で測線長600mと400mのP波浅層反射法地震探査を実施した．予備的な反射断面を作成し，深度60m〜400mの範囲で複数の連続の良い反射面を捉えた．深度60m付近の反射面はボーリングコアで確認された地層境界とほぼ一致しおおむね平坦である．60m以深は，南北方向で見掛け4度から13度の南傾斜の反射面が見られ，浅部の反射面の方が傾斜が大きい．深度100m〜200m付近にオンラップ構造が認められる． |
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| | 講演要旨(英文) | | We conducted P-wave high-resolution shallow seismic reflection survey near the point of Miho peninsula, Shizuoka City, to obtain subsurface structure between 100m and 300m deep. E-W and N-S survey lines were set orthogonally along paved road, unpaved road and baseball sub-ground. They are approximately 600m and 400m long, respectively. The preliminary CMP stacked sections show several continuous reflectors between 60m and 400m in depth. Reflector of 60m in depth is correlated to the boundary depth detected by nearby boring cores. Below 60m, reflectors dip southward with apparent 4 to 13 degree. Dips of shallow reflectors are larger than those of deep reflectors. Onlap structure is perceived between 100m and 200m in depth. |
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