段丘面の高度分布からみた東北日本弧中部の地殻変動と山地・盆地の形成

• 田力 正好

  東京大学地震研究所

• 池田 安隆

  東京大学大学院理学系研究科地球惑星科学専攻

書誌事項

タイトル別名

• Vertical Crustal Movement and Development of Basin and Range Topography in the Middle Part of the Northeast Japan Arc Estimated from Fluvial/Marine Terrace Data
• ダンキュウメン ノ コウド ブンプ カラ ミタ トウホク ニホン コ チュウブ ノ チカク ヘンドウ ト サンチ ボンチ ノ ケイセイ

抄録

The northeast (NE) Japan arc is an island arc located along the convergent boundary between the North American plate and the Pacific plate. Compressional deformation in the NE Japan arc is attributed to the subduction of the Pacific plate. We estimated the rates and spatial distribution of vertical crustal deformation in the middle part of the NE Japan arc on a geologic time scale (since about 150ka). The height difference between river profiles formed in Marine Isotope Stage (MIS) 1 and MIS 5e (or MIS 2 and MIS 6) is used as an indicator of uplift during those two stages. This method is based on the model in which river elevation is controlled mainly by climate and sea levels, and in which the longitudinal river profiles formed in similar sea level and climatic conditions have a similar geometry. Next, based on the observed data of crustal deformation andother existing geological/geophysical data, we inferred the process and mechanism of the evolution of basin and range topography in the NE Japan arc as follows: (1) The pattern of vertical deformation is in accordance with topography. This suggests that similar patterns of crustal deformation have been taking place since Pliocene time, resulting in the present topography of NE Japan. (2) The formation of a clear topographical boundary between a range and a basin can be attributed to slip on active faults. (3) The deformation of the NE Japan arc consists of deformation whose axes trend parallel to the arc-trench system and deformation whose axes trend perpendicular to the arctrench system. The distribution of ranges and basins in NE Japan arc is determined by this deformation pattern.

収録刊行物

• 第四紀研究

  第四紀研究 44 (4), 229-245, 2005

  日本第四紀学会

キーワード

• 河成段丘
• 海成段丘
• 地殻変動
• 山地
• 盆地
• 東北日本弧

詳細情報

• CRID: 1390001206496669312
• NII論文ID: 10019034989
• NII書誌ID: AN0034136X
• DOI: 10.4116/jaqua.44.229
• ISSN: 18818129
• ISSN: 04182642
• NDL書誌ID: 7453793
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7453793
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可