山形盆地断層帯南部の第四紀後期における活動性

DOI Web Site

書誌事項

タイトル別名
  • Late Quaternary activity of faults and recurrence interval of earthquakes in the southern part of the Western Boundary Fault Zone of the Yamagata Basin, northeastern Japan
  • ヤマガタ ボンチ ダンソウタイ ナンブ ノ ダイ4キ コウキ ニ オケル カツドウセイ

この論文をさがす

抄録

This study clarifies the recurrence interval of earthquakes in the southern part of the Western Boundary Fault Zone of the Yamagata Basin by the formative age of fluvial terraces based on drilling survey on the terrace to obtain overlying loamy soil including wide-spread volcanic ashes, such as K-Tz (95 ka) and AT (26-29 ka). The late Quaternary fluvial terraces in this area are divided into Terraces I to V in descending order. K-Tz is contained at the lowest part of loamy soil on Terrace I and found in the fluvial deposits of Terrace II, AT is found at the middle part of loamy soil on Terrace III. From the ages and the vertical displacements of the fluvial terraces, the average vertical slip rates of the southern part o the Western Boundary Fault Zone of the Yamagata Basin are 0.22-0.28 mm/yr, and recurrence interval of the earthquakes is estimated to be 7100-13800 years.

収録刊行物

  • 活断層研究

    活断層研究 2010 (33), 51-55, 2010

    一般社団法人　日本活断層学会

関連プロジェクト

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ