Mathematics
Scientific paper
Aug 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983puwl.reptq....b&link_type=abstract
Final Technical Report Purdue Univ., West Lafayette, IN. Dept. of Geoscience.
Mathematics
Crustal Fractures, Planetary Mantles, Refracted Waves, Seismic Waves, Comparison, Contours, Crystal Surfaces, Data Acquisition, Earth Crust, Mathematical Models, Poisson Ratio, Seismology
Scientific paper
Seismic refraction profiles for the North American continent were compiled. The crustal models compiled data on the upper mantle seismic velocity (P sub n), the crustal thickness (H sub c) and the average seismic velocity of the crystalline crust (V sub p). Compressional wave parameters were compared with shear wave data derived from surface wave dispersion models and indicate an average value for Poisson's ratio of 0.252 for the crust and of 0.273 for the uppermost mantle. Contour maps illustrate lateral variations in crustal thickness, upper mantle velocity and average seismic velocity of the crystalline crust. The distribution of seismic parameters are compared with a smoothed free air anomaly map of North America and indicate that a complidated mechanism of isostatic compensation exists for the North American continent. Several features on the seismic contour maps also correlate with regional magnetic anomalies.
Braile Lawrence W.
Hinze William J.
Keller George Randy
Vonfrese R. B. R.
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