Deep structure of Japan subduction zone as derived from local, regional, and teleseismic events

D. Zhao, A. Hasegawa, H. Kanamori

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450 Citations (Scopus)

Abstract

In the crust and uppermost mantle, low-velocity zones are clearly visible beneath active volcanoes. In the mantle wedge the low-velocity zones generally parallel with the slab and exist continuously to a depth of about 200-km, which is consistent with the petrological, geochemical and geodynamic studies. The existence of volcanism-related low-velocity anomalies in the mantle wedge is a general seismological characteristic of subduction zones. The Pacific slab beneath Japan is imaged more clearly than in previous studies as a high-velocity zone with a thickness of 80-90 km and a P wave velocity 4-6% higher than the normal mantle. Lower velocity anomalies are found in the mantle below the slab. -from Authors

Original languageEnglish
Pages (from-to)22,313-22,329
JournalJournal of Geophysical Research
Volume99
Issue numberB11
DOIs
Publication statusPublished - 1994
Externally publishedYes

ASJC Scopus subject areas

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

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