Estimation of thermal structure in the mantle wedge of northeastern Japan from seismic attenuation data

Junichi Nakajima, Akira Hasegawa

Research output: Contribution to journalArticlepeer-review

53 Citations (Scopus)

Abstract

We estimated thermal structure in the mantle wedge of NE Japan by applying the experimental results of olivine-dominated rocks to seismic attenuation data. Obtained temperatures at a 40 km depth are 1000-1130°C and 960-1090°C beneath the volcanic front and the back-arc side, respectively. We cannot obtain the areas with a temperature higher than 1400°C in the mantle wedge, which have been inferred from petrological studies. This is perhaps due to the localization of such anomalous areas. The obtained temperature is higher than that of the wet solidus of peridotite in the greater part of the back-arc side, which suggests that the addition of aqueous fluids plays an important role in generating melts in the mantle wedge.

Original languageEnglish
Pages (from-to)SDE 6-1 - 6-4
JournalGeophysical Research Letters
Volume30
Issue number14
DOIs
Publication statusPublished - 2003 Jul 15
Externally publishedYes

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

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