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  1. 131 地震研究所
  2. 東京大学地震研究所彙報
  3. 50
  4. 4
  1. 0 資料タイプ別
  2. 30 紀要・部局刊行物
  3. 東京大学地震研究所彙報
  4. 50
  5. 4

Fault-forming Process of the Komyo Fault in Central Japan

https://doi.org/10.15083/0000033237
https://doi.org/10.15083/0000033237
0e1ef059-563d-4699-9f3b-30a44f817638
名前 / ファイル ライセンス アクション
ji0504004.pdf ji0504004.pdf (2.3 MB)
Item type 紀要論文 / Departmental Bulletin Paper(1)
公開日 2008-05-30
タイトル
タイトル Fault-forming Process of the Komyo Fault in Central Japan
言語 en
言語
言語 eng
資源タイプ
資源 http://purl.org/coar/resource_type/c_6501
タイプ departmental bulletin paper
ID登録
ID登録 10.15083/0000033237
ID登録タイプ JaLC
その他のタイトル
その他のタイトル 赤石山地西縁の光明断層の発達過程
著者 恒石, 幸正

× 恒石, 幸正

WEKO 129757

恒石, 幸正

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吉田, 鎮男

× 吉田, 鎮男

WEKO 129758

吉田, 鎮男

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木村, 敏雄

× 木村, 敏雄

WEKO 129759

木村, 敏雄

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著者別名
識別子Scheme WEKO
識別子 129760
姓名 Tsuneishi, Yukimasa
著者別名
識別子Scheme WEKO
識別子 129761
姓名 Yoshida, Shizuo
著者別名
識別子Scheme WEKO
識別子 129762
姓名 Kimura, Toshio
著者所属
著者所属 地震研究所
著者所属
著者所属 東京大学地質学教室
抄録
内容記述タイプ Abstract
内容記述 In the fracture zone surrounding the Komyo fault, a large left-lateral strike-slip fault, there are many minor faults with distinct striations on their fault surfaces. The minor faults can be divided into two groups by their attitudes and by their senses of slip ; one group consists of left-lateral faults trending about N15°W, and the other of right-lateral faults trending about N75°W. The mode of occurrence of the minor faults is not dependent on lithology except for ductile, weak rocks such as mudstone, but changes systematically with distance from the main (Komyo) fault. The minor faults occur mostly within a zone 2000m wide adjacent to the main fault, and their frequency decreases with distance from the main fault. The frequency of left-lateral minor faults becomes considerably larger toward the main fault as compared with the frequency of right-lateral minor faults. The strikes of the left-lateral minor faults are, however, not necessarily exactly parallel to the main fault, but rotate counterclockwise up to 20° as they approach it. The process of development of the Komyo fault comprises the following four stages ; (I) flexuring stage, (II) minor fault-forming stage, (III) stage of minor fault proliferation and of appearance of the main fault, and (IV) stage of increasing displacements along the main fault and concurrent flexuring in the adjacent region. Thus it is inferred that minor faults were formed mostly at the earlier stages of the whole process of the Komyo fault development and then were rotated by the drag of strata due to the succeeding displacements along the main fault. Three types of earthquakes observed with high accuracy are considered as examples of faulting at the present time. Earthquake faults which have been produced in association with the three earthquake types are compared with the four stages of the Komyo fault development. As the result, the Matsushiro earthquake, the Gifuken-chubu earthquake, and the Parkfield-Cholame earthquake are considered to represent, respectively, stage II to III, stage III, and stage IV of fault development.
書誌情報 東京大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, University of Tokyo

巻 50, 号 4, p. 415-442, 発行日 1976-03-31
ISSN
収録物識別子タイプ ISSN
収録物識別子 00408972
書誌レコードID
収録物識別子タイプ NCID
収録物識別子 AN00162258
フォーマット
内容記述タイプ Other
内容記述 application/pdf
日本十進分類法
主題Scheme NDC
主題 453
出版者
出版者 東京大学地震研究所
出版者別名
Earthquake Research Institute, University of Tokyo
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