Quick Search:    advanced search

GSW Home   GeoRef Home   My GSW Alerts   Contact GSW   About GSW   Journals List   Help

This Article Full Text (PDF) References Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by PRIESTLEY, K. F. Articles by FEZIE, G. S. Search for Related Content GeoRef GeoRef Citation

Crust and upper mantle structure in the northwest Basin and Range province

SEISMOLOGICAL LABORATORY MACKAY SCHOOL OF MINES UNIVERSITY OF NEVADA, RENO, NEVADA 89557

Abstract

Seismic waves from nuclear explosions and from well-located local earthquakes have been recorded along several profiles through western Nevada, southeast Oregon, and eastern California. P_n delay times from these data and from additional travel times of NTS explosions recorded across the western Nevada seismic network have been interpreted in terms of varying crustal thickness of the western Great Basin. Our interpretation of these data implies that the crust thins from greater than 32 km thick in the vicinity of Mono Lake to 20 to 22 km thick over a broad region in northwest Nevada. The P_n headwave propagates to a distance of about 550 km with a velocity of 7.8 km/sec. At distances greater than 600 km a low velocity (7.44 km/sec), larger amplitude phase is observed. This phase may result from long-period energy diffracting into a shadow zone. A prominent, high-velocity second arrival following P_n by 1 to 2 sec in the distance range 340 to 475 km, is interpreted as a reflection from the base of the lithosphere at 60 to 70-km depth.

This article has been cited by other articles:

				X. Peng and E. D. Humphreys Moho dip and crustal anisotropy in northwestern Nevada from teleseismic receiver functions Bulletin of the Seismological Society of America, June 1, 1997; 87(3): 745 - 754. [Abstract] [PDF]

				H. GURROLA, J. B. MINSTER, H. GIVEN, F. VERNON, J. BERGER, and R. ASTER Analysis of high-frequency seismic noise in the western United States and eastern Kazakhstan Bulletin of the Seismological Society of America, August 1, 1990; 80(4): 951 - 970. [Abstract] [PDF]

				T. M. HEARN and R. W. CLAYTON Lateral velocity variations in Southern California. II. Results for the lower crust from Pn waves Bulletin of the Seismological Society of America, April 1, 1986; 76(2): 511 - 520. [Abstract] [PDF]