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Seismic anisotropy of the uppermost mantle absent beneath the east flank of the Reykjanes Ridge

NATIONAL INSTITUTE OF OCEANOGRAPHY, WORMLEY, GODALMING, SURREY, England

Abstract

A seismic refraction experiment was carried out 200 miles southeast of the Reykjanes Ridge and a normal oceanic crustal structure was observed. Analysis of 70 compressional-wave arrivals led to the conclusion that seismic anisotropy of the uppermost mantle may not exist here. A new model for the origin of anisotropy is proposed which predicts that the minimum velocity will always be found along a direction parallel to linear oceanic magnetic anomalies.

This article has been cited by other articles:

				J. R. Smallwood, R. S. White, and T. A. Minshull Sea-floor spreading in the presence of the Iceland plume: the structure of the Reykjanes Ridge at 61{degrees}40'N Journal of the Geological Society, November 1, 1995; 152(6): 1023 - 1029. [Abstract] [PDF]