Computer Science
Scientific paper
Apr 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999e%26psl.168..187s&link_type=abstract
Earth and Planetary Science Letters, Volume 168, Issue 1-2, p. 187-199.
Computer Science
5
Scientific paper
Wide-angle seismic reflection/refraction data, recorded on ten seismographs from five large explosive charges, clearly define the crustal and upper mantle velocities of the Makarov Basin. These data are combined with a tangential seismic reflection profile and with Russian navy refraction velocities to produce a seafloor to upper mantle velocity-depth function. The gently dipping sedimentary horizons contrast with the hummocky basement topography on the reflection profile. The seismic basement is interpreted as oceanic layer 2 consistent with the Russian navy velocities. Velocities of 6.7 km s-1 determined for the lower crust and 8.0 km s-1 for the upper mantle are constrained by the seismic record sections. The 6.7 km s-1 velocity layer is interpreted as oceanic crust layer 3. The well-resolved thickness of this layer of 15 km is substantially greater than the average thickness for layer 3 of 4 km. The velocities and thickness from the Makarov Basin, oceanic plateaus and hotspots, and continental crust are summarized for comparison. The character of seismic reflection basement and the velocity-depth function are consistent with thick oceanic crust in the Makarov Basin.
Jackson Ruth H.
Langinen A. Y.
Macnab Ron
Sorokin Yu. M.
Zamansky Yury Ya.
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