重力異常に基づく糸魚川‐静岡構造線北部の構造解析

書誌事項

タイトル別名
  • 2-D and 3-D Subsurface Density Structure in the Northern Part of the Itoigawa-Shizuoka Tectonic Line Derived by Gravity Surveying.
  • ジュウリョク イジョウ ニ モトヅク イトイガワ シズオカ コウゾウセン ホクブ ノ コウゾウ カイセキ

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抄録

We carried out gravity surveying along a profile of the reflection seismological prospecting in the northern part of the Itoigawa-Shizuoka Tectonic Line (ISTL). Combined use of gravity and seismic data enables us to construct a 2-D subsurface density model. We also pre sent a 3-D model which is consistent with the previous works on gravity and reflection/refraction prospecting. Both 2-D and 3-D models show a reverse fault structure dipping toward the east. We do not find any thrusting structure dipping toward the west as implied from the up lifting of the Hida range.

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