スラブ内地震活動とその発生メカニズム

• 瀬野 徹三

  東京大学地震研究所

書誌事項

タイトル別名

• Intraslab Seismicity and its Generation Mechanisms

抄録

History of studies of intraslab seismicity and its generation mechanisms, since the work by Wadati, is reviewed. Through the initial stage of studies of morphology of the intraslab seismicity, there followed the stage of discussion of focal mechanisms and terminal depths by mechanics and temperature of the slab. In 1970s, double seismic zones were discovered and their generation mechanisms were discussed in terms of bending or thermal stresses. In recent years, to overcome a difficulty that very high pressure prevents intraslab seismicity, dehydration embrittlement and phase transformation have been invoked for the mechanisms of intermediate and deep earthquakes, respectively. If the intermediate seismicity represents dehydration, it may give us a key to understand the distribution of fluids to the upper plate and to the seismogenic interplate thrusts, and finally to understand tectonics and volcanism in subduction zones.

収録刊行物

• 地震　第２輯

  地震　第２輯 61 (Supplement), 357-364, 2009

  公益社団法人 日本地震学会

キーワード

• Intraslab seismicity
• Intermediate seismicity
• Deep seismicity
• Phase change
• Dehydration embrittlement

詳細情報

• CRID: 1390001204303056768
• NII論文ID: 130004721050
• DOI: 10.4294/zisin.61.357
• ISSN: 18839029
• ISSN: 2186599X
• ISSN: 00371114
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可