Crustal structure of the Washington continental margin from refraction data

Autor:	Brian T. R. Lewis, J. John Taber
Rok vydání:	1986
Předmět:	Geophysics Continental margin Subduction Geochemistry and Petrology Lithosphere Trench Refraction (sound) Slab Submarine pipeline Seismogram Geology Seismology
Zdroj:	Bulletin of the Seismological Society of America. 76:1011-1024
ISSN:	1943-3573 0037-1106
DOI:	10.1785/bssa0760041011
Popis:	Refraction data were collected in an onshore-offshore experiment in 1978 near Grays Harbor, Washington. Two-dimensional raytracing and synthetic seismograms were used to model the data along the refraction lines. The resulting velocity model uses a broad-scale subduction zone geometry to explain the major features of the data. The three main contributions of the onshore-offshore model are: (1) evidence for an approximately 9° dip of the subducting oceanic lithosphere; (2) a clear indication of the point at which the subducting slab begins to bend beneath the margin; and (3) confirmation of the continuity of the slab from the buried trench offshore to beneath Puget Sound. The model also helps explain the distribution and stress orientation of earthquakes within the subduction zone.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::51b2ec01c895aed615cf9dab2cc52f1d https://doi.org/10.1785/bssa0760041011 Zobrazit plný text záznamu