Open AccessCompressional and Shear Wave Velocities at Pressures to 10 Kilobars for Basalts from the East Pacific Rise
Author(s) -
Christensen Nikolas I.
Publication year - 1972
Publication title -
geophysical journal of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.302
H-Index - 168
eISSN - 1365-246X
pISSN - 0016-8009
DOI - 10.1111/j.1365-246x.1972.tb06140.x
Subject(s) - basalt , geology , ridge , shear (geology) , longitudinal wave , seismology , shear waves , mid ocean ridge , petrology , wave propagation , paleontology , physics , quantum mechanics
Summary Compressional and shear wave velocities are reported to pressures of 10 kb for 15 cores of basalt dredged from the East Pacific Rise between 8° N and 13° N latitude. The compressional wave velocities are similar to previous measurements for basalts dredged from the Mid‐Atlantic Ridge and the Juan de Fuca Ridge. Shear wave velocities for the East Pacific Rise basalts show a systematic increase with increasing density. The ratio of compressional to shear wave velocity for oceanic basalt is generally between 1.80 and 1.90. Poisson's ratio at 10 kb is 0.28 for all the basalts included in this study.