New constraints on the upper mantle structure of the Slave craton from Rayleigh wave inversion

Details New constraints on the upper mantle structure of the Slave craton from Rayleigh wave inversion New constraints on the upper mantle structure of the Slave craton from Rayleigh wave inversion

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3410301c&link_type=abstract

Geophysical Research Letters, Volume 34, Issue 10, CiteID L10301

Mathematics

Logic

9

Seismology: Lithosphere (1236), Seismology: Surface Waves And Free Oscillations, Tectonophysics: Continental Cratons, Geographic Location: North America, Information Related To Geologic Time: Archean

Scientific paper

Rayleigh wave phase and amplitude data are analyzed to provide new insight into the velocity structure of the upper mantle beneath the Slave craton, in the northwestern Canadian Shield. We invert for phase velocities at periods between 20 s-142 s (with greatest sensitivity at depths of 28-200 km) using crossing ray paths from events recorded by the POLARIS broadband seismic network and the Yellowknife array. Phase velocities obtained for the Slave province are comparable to those from other cratons at shorter periods, but exceed the global average by ~2% at periods above 60 s, suggesting that the Slave craton may be an end member in terms of its high degree of mantle depletion. The one-dimensional inversion of phase velocities yields high upper-mantle S-wave velocities of 4.7 +/- 0.2 km/s that persist to 220 +/- 65 km depth and thus define the cratonic lithosphere. Azimuthal anisotropy is well resolved at all periods with a dominant fast direction of N59°E +/- 20°, suggesting that upper mantle anisotropy beneath the Slave craton is influenced by both lithospheric fabric and sub-lithospheric flow.

Affiliated with

Also associated with

No associations

Rating

New constraints on the upper mantle structure of the Slave craton from Rayleigh wave inversion does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with New constraints on the upper mantle structure of the Slave craton from Rayleigh wave inversion, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and New constraints on the upper mantle structure of the Slave craton from Rayleigh wave inversion will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-768994