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Upper mantle structure from teleseismic P wave arrivals in Washington and northern Oregon ( USA).

Journal of Geophysical Research
By:  and 

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Abstract

Teleseismic P wave travel time residuals are used to detect lateral velocity heterogeneities in the upper mantle beneath Washington and N Oregon. The results of an inversion for 3-D velocity variations resolves an E dipping high-velocity zone that we interpret as the subducting Juan de Fuca plate. The plate is characterized by 3-8% higher velocities than those in the surrounding upper mantle. Inversion of the travel time data and ray trace modeling indicate that the plate extends to a depth of 200- 300 km. Based on changes in the geometry and velocity structure of the subducted Juan de Fuca plate 6 of about 123oW, we propose that the subducted slab is segmented into 3 sections beneath Washington and N Oregon. -from Authors

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Upper mantle structure from teleseismic P wave arrivals in Washington and northern Oregon ( USA).
Series title Journal of Geophysical Research
Volume 91
Issue B2
Year Published 1986
Language English
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Journal of Geophysical Research
First page 2077
Last page 2094