UTokyo Repository 東京大学

UTokyo Repository >
131 地震研究所 >
東京大学地震研究所彙報 >

このページ(論文)をリンクする場合は次のURLを使用してください: http://hdl.handle.net/2261/13210

タイトル: 反射法地震探査による十勝活断層帯中部の浅層構造
その他のタイトル: Shallow seismic reflection profiling across the central part of the Tokachi active fault zone, Hokkaido, Japan
著者: 越後, 智雄
宮内, 崇裕
河村, 知徳
佐藤, 比呂志
蔵下, 英司
加藤, 一
井川, 猛
川中, 卓
折戸, 雅幸
長谷川, 貴志
伊藤, 谷生
著者(別言語): Echigo, Tomoo
Miyauchi, Takahiro
Kawamura, Tomonori
Sato, Hiroshi
Kurashimo, Eiji
Kato, Hajime
Ikawa, Takeshi
Kawanaka, Taku
Orito, Masayuki
Hasegawa, Takashi
Ito Tanio
キーワード: shallow seismic reflection method
Tokachi Plain
active fault (flexure) zone
deformed fluvial terraces
late Quaternary
発行日: 2001年7月25日
出版者: 東京大学地震研究所
掲載誌情報: 東京大学地震研究所彙報. 第76冊第1号, 2001.7.25, pp. 129-134
抄録: The Tokachi active fault zone, a chain of active faults and flextures 80 km long from north to south, exists as the topographic boundary between the Tokachi Plain and the eastern uplands, Hokkaido, Japan. We carried out shallow seismic reflection profiling using a mini-vibrator to clarify the implications between surface deformation and subsurface structures of this fault zone at the most highly active area of the Makubetsu Plateau. The results obtained are as follows. Two distinct flexures are recognized in the seismic reflection profile. The western flexure is about 2 km wide and has at least a 0.25 to 0.30 second vertical displacement, whose sense is concordant with the deformation of the surface of the upper fluvial terraces geomorphologically identified as the Tobatsugawa fault. The eastern one also has the same deformation pattern of fluvial terraces as that geomorphologically identified as the Itaira fault. However, both geomorphic flexures are below one-sixth to one-third of the subsurface flexural zone in width. The seismic reflection method is necessarily required, to evaluate the net displacement of active flexural zone, in addition to morphotectonic observations.
URI: http://hdl.handle.net/2261/13210
ISSN: 00408972


ファイル 記述 サイズフォーマット
ji0761012.pdf935.3 kBAdobe PDF見る/開く



Valid XHTML 1.0! DSpace Software Copyright © 2002-2010  Duraspace - ご意見をお寄せください