Results 21 to 30 of about 27,412 (233)

Finite-frequency sensitivity of body waves to anisotropy based upon adjoint methods [PDF]

, 2007
We investigate the sensitivity of finite-frequency body-wave observables to mantle anisotropy based upon kernels calculated by combining adjoint methods and spectral-element modelling of seismic wave propagation.
Liu, Qinya, Sieminski, Anne, Trampert, Jeannot, Tromp, Jeroen   +3 more
core   +1 more source

Automated shear-wave splitting analysis for single- and multi- layer anisotropic media

Seismica, 2023
Shear-wave velocity anisotropy is present throughout the earth. The strength and orientation of anisotropy can be observed by shear-wave splitting (birefringence) accumulated between earthquake sources and receivers. Seismic deployments are getting ever
Thomas Samuel Hudson, Joseph Asplet, Andrew M Walker   +2 more
doaj   +1 more source

Estimation of Litho-Fluid Facies Distribution from Zero-Offset Acoustic and Shear Impedances

Applied Sciences, 2022
Seismic data are considered crucial sources of data that help identify the litho-fluid facies distributions in reservoir rocks. However, different facies mostly have similar responses to seismic attributes.
Mohammed Fathy Gouda, Abdul Halim Abdul Latiff, Seyed Yasser Moussavi Alashloo   +2 more
doaj   +1 more source

Mid-mantle deformation inferred from seismic anisotropy [PDF]

, 2002
With time, convective processes in the Earth's mantle will tend to align crystals, grains and inclusions. This mantle fabric is detectable seismologically, as it produces an anisotropy in material properties—in particular, a directional dependence in ...
A Yeganeh-Haeri, AE Ringwood, AR Oganov, C Tong, CJ Wolfe, CP Meade, D Mainprice, DL Anderson, G Barruol, G Clitheroe, Guilhem Barruol, J-M Kendall, J-M Kendall, J-P Montagner, J-P Montagner, J.-Michael Kendall, James Wookey, JB Gaherty, JX Mitrovica, K Fischer, K Hirose, L Stixrude, LP Vinnik, LP Vinnik, MJ Fouch, MK Savage, NJ Kusznir, PG Silver, PG Silver, R Van der Hilst, S Karato, S Karato, S Widiyantoro, S Özalaybey, SH Kirby   +34 more
core   +4 more sources

Correlation between crustal anisotropy and seismogenic stress field beneath Shillong–Mikir Plateau and its vicinity in North East India

Geomatics, Natural Hazards & Risk, 2021
A systematic study towards understanding the correlation between polarization direction of crustal anisotropy with seismogenic stress field at different locations of the Shillong-Mikir Plateau and its vicinity in North East India is attempted.
Santanu Baruah, Antara Sharma, Chandan Dey, Sowrav Saikia, Goutam Kashyap Boruah, Ayodeji Adekunle Eluyemi, Prachurjya Borthakur, Nabajyoti Molia, Anwesha Dutta Hazarika, Saitluanga Sailo, Sebastiano D’Amico, Manoj K. Phukan, Saurabh Baruah, J. R. Kayal   +13 more
doaj   +1 more source

Complex anisotropy beneath the Peruvian flat slab from frequency-dependent, multiple-phase shear wave splitting analysis [PDF]

, 2013
Flat or shallow subduction is a relatively widespread global occurrence, but the dynamics remain poorly understood. In particular, the interaction between flat slabs and the surrounding mantle flow has yet to be studied in detail.
Eakin, Caroline M., Long, Maureen D.
core   +1 more source

Confronting Solid‐State Shear Bias: Magmatic Fabric Contribution to Crustal Seismic Anisotropy

Geophysical Research Letters, 2023
Seismic anisotropy is controlled by aligned rock‐forming minerals, which most studies attribute to solid‐state shear with less consideration for magmatic fabric in plutonic rocks (rigid‐body rotation of crystals in the presence of melt).
Michael G. Frothingham, Kevin H. Mahan, Vera Schulte‐Pelkum, Philippe Goncalves, Michele Zucali   +4 more
doaj   +1 more source

Response of the mantle to flat slab evolution: Insights from local splitting beneath Peru [PDF]

, 2014
The dynamics of flat subduction, particularly the interaction between a flat slab and the overriding plate, are poorly understood. Here we study the (seismically) anisotropic properties and deformational regime of the mantle directly above the Peruvian ...
Barazangi, Bird, Bowman, Cahill, Caroline M. Eakin, Christensen, Coney, Couch, Crampin, Cristóbal Condori, Dickinson, Eakin, Espurt, Evans, Faccenda, Feng, Gripp, Hampel, Hampel, Hayes, Healy, Henry, Hernando Tavera, Hilairet, Humphreys, James, Jung, Jung, Jung, Karato, Katayama, Kneller, Kneller, Lara S. Wagner, Lloyd, Long, Long, Ma, MacDougall, Maureen D. Long, Nakajima, PeruSE, Phillips, Porter, Ramos, Rosenbaum, Silver, Silver, Susan L. Beck, Wagner, Wagner, Woods, Wüstefeld   +52 more
core   +2 more sources

The Hudson Bay Lithospheric Experiment (HuBLE) : Insights into Precambrian Plate Tectonics and the Development of Mantle Keels [PDF]

, 2015
The UK component of HuBLE was supported by Natural Environment Research Council (NERC) grant NE/F007337/1, with financial and logistical support from the Geological Survey of Canada, Canada–Nunavut Geoscience Office, SEIS-UK (the seismic node of NERC ...
Bastow, I. D., Darbyshire, F. A., Eaton, D. W., Helffrich, G., Kendall, J.-M., Pawlak, A. E., Snyder, D. B., Thompson, D. A., Wookey, J.   +8 more
core   +2 more sources

Ab initio study of the elastic behavior of MgSiO3 ilmenite at high pressure [PDF]

, 2002
We investigate the athermal high pressure behavior of the elastic properties of MgSiO3 ilmenite up to 30 GPa using the ab initio pseudopotential method. Our results at zero pressure are in good agreement with single-crystal elasticity measurements.
Da Silva, CRS, Karki, BB, Stixrude, L, Wentzcovitch, RM   +3 more
core   +1 more source