和歌山平野北東部における中央構造線の地下構造
書誌事項
- タイトル別名
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- Subsurface structure of the Median Tectonic Line in the northeastern part of the Wakayama plain, central Japan
説明
The western extension of the Negoro fault, a segment of the Median Tectonic Line active fault system at the western part of Kink District, cuts the Middle Pleistocene deposits and is covered with Holocene alluvial deposits in the Wakayama plain, central Japan. We have carried out several drillings and a seismic reflection study using the S waves in this plain to clarify the subsurface structure around the MTL and to date recent faulting events;<BR>The buried reverse fault structure and stratigr a phic evidence with dates were clarified by seismic reflection method and a 80 meters deep drilling. As the fault shattered zone accampanies the Cretaceous Izumi sedimentary rocks, Sambagawa metamorphic rocks and ryolite intruded to the zone in the Miocene, this structure corresponds to the geologically defined MTL in the narrow sense and make a fault zone with the subordinary faults.<BR>The vertical displacement along th i s fault is estimated to be about 1 meter on the uncomformity between the Holocene sediments and the horizons of late Quaternary formations.<BR>The latest event of this fault may be younger than 8,000yBP, though the detailed age of the event and recurrence interval along the fault were not obtained by this study.
収録刊行物
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- Active Fault Research
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Active Fault Research 1998 (17), 84-96, 1998
Japanese Society for Active Fault Studies
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詳細情報 詳細情報について
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- CRID
- 1390282679405307264
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- NII論文ID
- 130003355556
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- ISSN
- 09181024
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可
