Mantle flow at a slab edge: Seismic anisotropy in the Kamchatka region

Citation
V. Peyton et al., Mantle flow at a slab edge: Seismic anisotropy in the Kamchatka region, GEOPHYS R L, 28(2), 2001, pp. 379-382
Citations number
35
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Earth Sciences
Journal title
GEOPHYSICAL RESEARCH LETTERS
ISSN journal
0094-8276 → ACNP
Volume
28
Issue
2
Year of publication
2001
Pages
379 - 382
Database
ISI
SICI code
0094-8276(20010115)28:2<379:MFAASE>2.0.ZU;2-0
Abstract
The junction of the Aleutian Island and the Kamchatka peninsula defines a s harp turn in the boundary of the Pacific and North American plates, termina ting the subduction zones of the northwest Pacific. The regional pattern of shear-wave birefringence near the junction indicates that trench-parallel strain follows the seismogenic Benioff zone, but rotates to trench-normal b eyond the slab edge. Asthenospheric mantle is inferred to flow around and b eneath the disrupted slab edge, and may influence the shallowing dip of the Benioff zone at the Aleutian junction.