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Tatsumi et al. 1994

Tatsumi, Y., Ito, K. and Goto, A. (1994). Elastic wave velocities in isochemical granulite and amphibolite: Origin of a low-velocity layer at the slab/mantle wedge interface. Geophysical Research Letters 21: doi: 10.1029/93GL03171. issn: 0094-8276.

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 interface in subduction zones. ¿ American Geophysical Union 1994

BACKGROUND DATA FILES

	Abstract

Keywords
Seismology, Structure of the lithosphere and upper mantle, Tectonophysics, Plate boundary structures and processes

Journal
Geophysical Research Letters
http://www.agu.org/journals/gl/

Publisher
American Geophysical Union
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