Seismic anisotropy and mantle dynamics beneath the Malawi Rift Zone, East Africa†
Sign Up to like & getrecommendations! Published in 2017 at "Tectonics"
DOI: 10.1002/2017tc004519
Abstract: SKS, SKKS, and PKS splitting parameters measured at 34 seismic stations that we deployed in the vicinity of the Cenozoic Malawi Rift Zone (MRZ) of the East African Rift System demonstrate systematic spatial variations with… read more here.
Keywords: rift zone; mantle; rift; seismic anisotropy ... See more keywords
On the Fluid Dependence of Seismic Anisotropy: Beyond Biot-Gassmann
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Earth Science"
DOI: 10.1007/s12583-017-0806-9
Abstract: This work addresses the question of the fluid dependence of the non-dimensional parameters of seismic anisotropy. It extends the classic theory of the fluid-dependence of elasticity, and applies the approximation of weak seismic anisotropy. The… read more here.
Keywords: seismic anisotropy; classic theory; fluid dependence;
Deformation, crystal preferred orientations, and seismic anisotropy in the Earth's D '' layer
Sign Up to like & getrecommendations! Published in 2018 at "Earth and Planetary Science Letters"
DOI: 10.1016/j.epsl.2018.03.032
Abstract: Abstract We use a forward multiscale model that couples atomistic modeling of intracrystalline plasticity mechanisms (dislocation glide ± twinning) in MgSiO3 post-perovskite (PPv) and periclase (MgO) at lower mantle pressures and temperatures to polycrystal plasticity… read more here.
Keywords: post perovskite; simple shear; cmb; crystal preferred ... See more keywords
Anisotropy in the deep Earth
Sign Up to like & getrecommendations! Published in 2017 at "Physics of the Earth and Planetary Interiors"
DOI: 10.1016/j.pepi.2017.05.005
Abstract: Abstract Seismic anisotropy has been found in many regions of the Earth's interior. Its presence in the Earth's crust has been known since the 19th century, and is due in part to the alignment of… read more here.
Keywords: deep earth; physics; seismic anisotropy; anisotropy ... See more keywords
Seismic anisotropy in central North Anatolian Fault Zone and its implications on crustal deformation
Sign Up to like & getrecommendations! Published in 2018 at "Physics of the Earth and Planetary Interiors"
DOI: 10.1016/j.pepi.2018.01.012
Abstract: Abstract We investigate the crustal seismic structure and anisotropy around the central portion of the North Anatolian Fault Zone, a major plate boundary, using receiver function analysis. The characterization of crustal seismic anisotropy plays a… read more here.
Keywords: fault; north anatolian; fault zone; anatolian fault ... See more keywords
Active and fossil mantle flows in the western Alpine region unravelled by seismic anisotropy analysis and high-resolution P wave tomography
Sign Up to like & getrecommendations! Published in 2018 at "Tectonophysics"
DOI: 10.1016/j.tecto.2018.03.002
Abstract: Abstract The anisotropy of seismic velocities in the mantle, when integrated with high-resolution tomographic models and geologic information, can be used to detect active mantle flows in complex plate boundary areas, providing new insights on… read more here.
Keywords: mantle flows; high resolution; mantle; seismic anisotropy ... See more keywords
Lattice-preferred orientation of amphibole, chlorite, and olivine found in hydrated mantle peridotites from Bjørkedalen, southwestern Norway, and implications for seismic anisotropy
Sign Up to like & getrecommendations! Published in 2019 at "Tectonophysics"
DOI: 10.1016/j.tecto.2018.11.011
Abstract: Abstract Understanding lattice-preferred orientations (LPOs) of olivine is important in the study of seismic anisotropy and mantle flow of the upper mantle in the earth. Although olivine is the major mineral of the upper mantle,… read more here.
Keywords: hydrated mantle; seismic anisotropy; olivine; amphibole chlorite ... See more keywords
Multiscale spatial distribution of crustal seismic anisotropy beneath the northeastern margin of the Tibetan plateau and tectonic implications of the Haiyuan fault
Sign Up to like & getrecommendations! Published in 2020 at "Tectonophysics"
DOI: 10.1016/j.tecto.2019.228274
Abstract: Abstract The Haiyuan fault is a large strike-slip fault in the northeastern (NE) margin of the Tibetan plateau. Using new data recorded by a temporary seismic array, this study obtains crustal seismic anisotropy measurements in… read more here.
Keywords: seismic anisotropy; tibetan plateau; fault; haiyuan fault ... See more keywords
Seismic anisotropy beneath the eastern margin of the Tibetan Plateau from SKS splitting observations
Sign Up to like & getrecommendations! Published in 2020 at "Tectonophysics"
DOI: 10.1016/j.tecto.2020.228430
Abstract: Abstract The eastern margin of the Tibetan Plateau is one of the areas of the entire region with the most complex deformation. Seismic anisotropy reveals the imprints of past and present deformation in the lithosphere… read more here.
Keywords: seismic anisotropy; tibetan plateau; margin tibetan; eastern margin ... See more keywords
The competing effects of olivine and orthopyroxene CPO on seismic anisotropy
Sign Up to like & getrecommendations! Published in 2021 at "Tectonophysics"
DOI: 10.1016/j.tecto.2021.228954
Abstract: Abstract Orthopyroxene is the second most abundant mineral in the upper mantle and, like olivine, can form crystallographic preferred orientations (CPO) during mantle deformation that may influence mantle seismic anisotropy. Here we use a compilation… read more here.
Keywords: seismic anisotropy; orthopyroxene cpo; olivine orthopyroxene;
Seismic Anisotropy of the Upper Mantle Below the Western Rift, East Africa
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Geophysical Research"
DOI: 10.1029/2017jb015409
Abstract: Although the East African rift system formed in cratonic lithosphere above a large‐scale mantle upwelling, some sectors have voluminous magmatism, while others have isolated, small‐volume eruptive centers. We conduct teleseismic shear wave splitting analyses on… read more here.
Keywords: mantle; volcanic province; western rift; rift ... See more keywords