Physics – Geophysics
Scientific paper
Jan 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994georl..21...17t&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 21, no. 1, p. 17-20
Physics
Geophysics
5
Amphiboles, Earth Mantle, Earthquakes, S Waves, Seismology, Subduction (Geology), Velocity Measurement, Geophysics, Petrography, Room Temperature, Solid-Solid Interfaces
Scientific paper
Simultaneous measurements of compressional and shear wave velocities, Vp and Vs, in granulite and amphibolite with identical chemistry were carried out from room temperature to 850 C at 1 GPa. Both Vp and Vs in granulite and amphibolite decreased linearly with increasing temperature. The values of Vp and Vs at 700 C are 7.75 km/s and 4.37 km/s for granulite, and 7.40 km/s and 4.21 km/s for amphibolite, respectively. 3 - 4% lowering of elastic wave velocities in hydrous amphibolite compared with anhydrous granulites may be consistent with seismological observations indicating the presence of a low-velocity layer at the slab/mantle wedge in subduction zones.
Goto Atsushi
Ito Katsushi
Tatsumi Yoshiyuki
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