A seismic refraction profile and crustal structure in central interior Alaska

Autor:	Larry Gedney, Kenneth Hanson, Eduard Berg
Rok vydání:	1968
Předmět:	Shot point Geophysics Geochemistry and Petrology business.industry Coal mining Sedimentary rock Seismic refraction Surface layer Structural basin business Seismology Geology
Zdroj:	Bulletin of the Seismological Society of America. 58:1657-1665
ISSN:	1943-3573 0037-1106 1966-1967
DOI:	10.1785/bssa0580051657
Popis:	An unreversed seismic refraction profile was obtained during the winter of 1966-1967 from several small chemical explosions in an open pit coal mine near Suntrana, Alaska. The profile runs from south to north across the Tanana Basin in central interior Alaska. Both P and S waves, generated by the explosions, were observed out to a distance of 217 km from the shot point. A four-layer crustal model is adopted to explain the first and later prominent seismic phases. The P velocities range from 3.67 km/sec in the sedimentary surface layer to an apparent value of 8.83 km/sec in the upper mantle. It is assumed that the Moho is dipping to the south under the Alaska Range, from a depth of 32 km at Fairbanks to approximately 48 km under the shot point.
Databáze:	OpenAIRE
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