Uppermost mantle velocities and anisotropy beneath Europe
نویسندگان
چکیده
منابع مشابه
Upper mantle anisotropy beneath the Geoscope stations
Seismic anisotropy has been widely studied this last decade, particularly by measuring splitting of vertically propagating core shear waves. The main interest in this technique is to characterize upper mantle flow beneath seismic stations. On the other hand, the major restriction in this method is that a single station gives a single anisotropy measurement. Alternative methods have been develop...
متن کاملSeismic anisotropy of the uppermost mantle beneath the Rio Grande rift: Evidence from Kilbourne Hole peridotite xenoliths, New Mexico
a Graduate School of Science and Technology, Shizuoka University, Ohya 836, Shizuoka 422-8529, Japan b Géosciences Montpellier, Université Montpellier 2 and CNRS, Cc 060, Place E. Bataillon, 34095 Montpellier Cedex 5, France c Institute of Geosciences, Shizuoka University, Ohya 836, Shizuoka 422-8529, Japan d Department of Geological Sciences, University of Texas at El Paso, TX 79968, USA e Dep...
متن کاملUpper and mid‐mantle anisotropy beneath the Tonga slab
[1] Measurements of source‐side splitting in S waves from events within the Tonga slab reveal anisotropy in the upper and mid‐mantle beneath the slab. We observed splitting for events originating at both upper mantle and transition zone depths. Anisotropic fast directions ( ) are trench parallel or sub‐parallel for both upper mantle and transition zone events. Delay times (dt) decrease with dep...
متن کاملVelocity variations in the uppermost mantle beneath the southern Sierra Nevada and Walker Lane
[1] We model Pn waveforms from two earthquakes in the southwestern United States (Mammoth Lakes, California, and western Nevada) to determine a velocity model of the crustal and mantle structure beneath the southern Sierra Nevada and Walker Lane. We derive a one-dimensional velocity model that includes a smooth crust-mantle transition east of Death Valley and extending south into the eastern Mo...
متن کاملP-wave velocity structure of the crust and uppermost mantle beneath Iceland from local earthquake tomography
The structure of the crust and uppermost mantle beneath Iceland, the keys to understanding the magma plumbing system of the hotspot and hotspot–ridge interaction, was poorly constrained in previous seismological investigations. Here we develop a three-dimensional P-wave velocity model of the Icelandic crust and uppermost mantle from tomographic inversion of over 3500 first-arrivals from local e...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Geophysical Research: Solid Earth
سال: 1999
ISSN: 0148-0227
DOI: 10.1029/1998jb900088