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 language | English |
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Pages (from-to) | 22,313-22,329 |
Journal | Journal of Geophysical Research |
Volume | 99 |
Issue number | B11 |
DOIs | |
Publication status | Published - 1994 |
Externally published | Yes |
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