Results 21 to 30 of about 1,574 (185)

Spin Transition of Iron in Deep‐Mantle Ferromagnesite

open access: yesGeophysical Monograph Series, Page 115-125., 2020

This book is Open Access. A digital copy can be downloaded for free from Wiley Online Library.

Explores the behavior of carbon in minerals, melts, and fluids under extreme conditions

Carbon trapped in diamonds and carbonate-bearing rocks in subduction zones are examples of the continuing exchange of substantial carbon ...
Jiachao Liu, Suyu Fu, Jung‐Fu Lin
wiley  

+3 more sources

Upper mantle anisotropy from shear wave splitting of teleseismic earthquakes in the Kumaun-Garhwal and adjoining area of NW Himalaya

open access: yesJournal of Asian Earth Sciences: X, 2021
Teleseismic earthquakes data recorded by 8 broadband digital seismic stations deployed in the Kumaun-Garhwal and adjoining area of NW Himalaya are analyzed to investigate the seismic anisotropy in the upper mantle. Shear-wave splitting parameters (ɸ and ∂
Narendra Kumar   +4 more
doaj   +1 more source

Seismic wave propagation in anisotropic ice – Part 1: Elasticity tensor and derived quantities from ice-core properties [PDF]

open access: yesThe Cryosphere, 2015
A preferred orientation of the anisotropic ice crystals influences the viscosity of the ice bulk and the dynamic behaviour of glaciers and ice sheets. Knowledge about the distribution of crystal anisotropy is mainly provided by crystal orientation fabric
A. Diez, O. Eisen
doaj   +1 more source

Mantle-flow diversion beneath the Iranian plateau induced by Zagros’ lithospheric keel

open access: yesScientific Reports, 2021
Previous investigation of seismic anisotropy indicates the presence of a simple mantle flow regime beneath the Turkish-Anatolian Plateau and Arabian Plate.
Ayoub Kaviani   +8 more
doaj   +1 more source

Effects of Background Porosity on Seismic Anisotropy in Fractured Rocks: An Experimental Study

open access: yesApplied Sciences, 2023
Fractures are widely distributed in the subsurface and are crucial for hydrocarbon, CCS, offshore infrastructure (windfarms), and geothermal seismic surveys.
Yuangui Zhang   +3 more
doaj   +1 more source

The anisotropy of hexagonal close-packed iron under inner core conditions: the effect of light elements

open access: yesEarth and Planetary Physics, 2022
In recent decades, global seismic observations have identified increasingly complex anisotropy of the Earth’s inner core. Numerous seismic studies have confirmed hemispherical variations in the inner core’s anisotropy.
Wei Zhang, Mei Tang, ZhenWei Niu
doaj   +1 more source

Seismic anisotropy of Opalinus Clay: tomographic investigations using the infrastructure of an underground rock laboratory (URL)

open access: yesSwiss Journal of Geosciences, 2021
Seismic anisotropy and attenuation make claystone formations difficult to characterize. On the other hand, in many geotechnical environments, precise knowledge of structure and elastic properties of clay formations is needed. In crystalline and rock salt
Roman Esefelder   +4 more
doaj   +1 more source

Research progress on layered seismic anisotropy - A review

open access: yesEarthquake Research Advances, 2021
Seismic anisotropy is an effective feature to study the inner structure of the Earth. In complex tectonic area, the assumption of single-layer anisotropy is sometimes not well consistent with the observed data; thus, the assumption of multi-layered (i.e.
Shengyi Shen, Yuan Gao
doaj   +1 more source

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

open access: yesSeismica, 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   +2 more
doaj   +1 more source

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

open access: yesApplied 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   +2 more
doaj   +1 more source

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