Stress Fields in Slabs Penetrating into the Lower Mantle, and Rheology and Composition of the Lower Mantle.

• NAKAKUKI Tomoeki

  Ocean Research Institute, University of Tokyo

• FUJIMOTO Hiromi

  Ocean Research Institute, University of Tokyo

抄録

Focal mechanisms of deep-focus earthquakes show compressional stress fields in the deepest part of upper mantle slabs. We examine mechanisms to realize the stress fields using numerical models of slabs interacting with a phase and/or a chemical boundary. The compressional stress field implies that compositional density difference greater than 2% exists at the 660km discontinuity, or that viscosity increases by a factor larger than a few tens and linear-law rheology dominates the flow mechanism in the lower mantle.

収録刊行物

• Ｐｒｏｃｅｅｄｉｎｇｓ　ｏｆ　ｔｈｅ　Ｊａｐａｎ　Ａｃａｄｅｍｙ．　Ｓｅｒ．　Ｂ：　Ｐｈｙｓｉｃａｌ　ａｎｄ　Ｂｉｏｌｏｇｉｃａｌ　Ｓｃｉｅｎｃｅｓ

  Ｐｒｏｃｅｅｄｉｎｇｓ　ｏｆ　ｔｈｅ　Ｊａｐａｎ　Ａｃａｄｅｍｙ．　Ｓｅｒ．　Ｂ：　Ｐｈｙｓｉｃａｌ　ａｎｄ　Ｂｉｏｌｏｇｉｃａｌ　Ｓｃｉｅｎｃｅｓ 70 (2), 19-24, 1994

  日本学士院

キーワード

• Slab penetration
• rheology of the lower mantle
• mantle convection

詳細情報

• CRID: 1390001204147785216
• NII論文ID: 130000907870
• DOI: 10.2183/pjab.70.19
• ISSN: 13492896
• ISSN: 03862208
• Web Site: http://www.jstage.jst.go.jp/article/pjab1977/70/2/70_2_19/_pdf
• 本文言語コード: en
• 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