Physics
Scientific paper
Feb 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30c..18p&link_type=abstract
Geophysical Research Letters, Volume 30, Issue 3, pp. 18-1, CiteID 1118, DOI 10.1029/2002GL015931
Physics
22
Seismology: Core And Mantle, Seismology: Lithosphere And Upper Mantle, Seismology: Surface Waves And Free Oscillations
Scientific paper
We have built a Sv-wavespeed tomographic model for the upper mantle beneath the Siberian platform and surrounding region derived from the analysis of more than 13,000 fundamental and higher mode regional waveforms. The dense path coverage and rich higher mode content of the data allow building an upper mantle image with an horizontal resolution of a few hundred kilometers extending to ~400 km depth. The high velocity, upper mantle lid or seismic lithosphere is ~200 km thick beneath most of the Siberian platform but may extend to ~250 km depth beneath small areas. A high velocity seismic lid also underlies a large region west of the Siberian platform. Our observation of a ~200 thick seismic lithosphere beneath the Siberian platform on the slow-moving Eurasian plate, similar to the thickness of the seismic lithosphere beneath Precambrian terrains on the fast-moving Australian plate, suggests that a moderately thick seismic lithosphere beneath Precambrian terrains may be more common than previously supposed.
Debayle Eric
Priestley Keith
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