地球浅部の温度構造

DOI Web Site 被引用文献2件 参考文献75件 オープンアクセス

書誌事項

タイトル別名
  • Lithospheric Thermal Structure: One of Factors Influencing Depth of Earthquakes
  • 地球浅部の温度構造--地震発生層との関連
  • チキュウセンブ ノ オンド コウゾウ ジシン ハッセイソウ ト ノ カンレン
  • —地震発生層との関連—
公開日
2009
DOI
  • 10.4294/zisin.61.239
公開者
公益社団法人 日本地震学会

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説明

This paper addresses some issues related to relationship between lithospheric thermal regime and depth extent of seismicity. Thickness of seismogenic crustal layer correlates with surface heat flow in most intraplate seismic areas of the world. Although inverse relationship between heat flow and the base of seismogenic zone is obvious, quantitative relationships are less certain. Compilation of previous studies shows that temperatures at the base of seismogenic zone appear to be distributed from about 250° to 450° over a large depth interval, 5-30 km, at different tectonic settings. It supports that temperature is one of factors governing the focal depth. Variations in lithology, slip rate, pore pressure, and focal mechanism may account for the temperature difference. Geothermal gradient data and bottom depth of magnetized layers are also useful proxy to reveal the base of seismogenic zone. These multidisciplinary data may provide a useful indicator of lithospheric thermal structure and improve the correlation with depth limit of seismicity.

収録刊行物

  • 地震　第２輯

    地震　第２輯 61 (Supplement), 239-245, 2009

    公益社団法人 日本地震学会

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