Results 71 to 80 of about 3,205,657 (173)
The Influence of ɛ‐to‐Py FeOOH Phase Transition on the Lower Mantle Heterogeneities
Geochemistry, Geophysics, GeosystemsHydrous minerals transported by cold subducting slabs to the lowermost mantle are believed to significantly influence mantle properties and the heterogeneities in the core‐mantle boundary (CMB) region.
Sparsh Sharma, Gaurav Shukla
doaj +1 more source
Geophysical Research Letters, 2016 We stack a large global data set of 1 Hz PKKP waveforms to constrain globally averaged properties of PKKP precursors. We find that the precursor observations are better explained by scattering from core‐mantle boundary (CMB) topography than by scattering
Nicholas Mancinelli, Peter Shearer
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Melting and defect transitions in FeO up to pressures of Earth's core-mantle boundary. [PDF]
Nat Commun, 2023 Dobrosavljevic VV +8 more
europepmc +1 more source
The Zagros Core: Deformation of the continental lithospheric mantle [PDF]
The Zagros of Iran form one of the youngest collisional orogenic belts on Earth. At shallow depths, shortening across the Zagros is accommodated by folding in the sediments, high-angle thrust faulting in the basement and thickening of the lower crust ...
Barron, J. +4 more
core +1 more source
Thermal, Elastic and Seismic Signature of High-Resolution Mantle Circulation Models [PDF]
, 2009 A long-standing question in the study of Earth’s deep interior is the origin of seismic mantle heterogeneity. The challenge is to efficiently mine the wealth of information available in complex seismic waveforms and to separate the potential ...
Schuberth, Bernhard
core +1 more source
Globally distributed subducted materials along the Earth's core-mantle boundary: Implications for ultralow velocity zones. [PDF]
Sci Adv, 2023 Hansen SE +4 more
europepmc +1 more source
Unsolved problems in the lowermost mantle [PDF]
, 2006 Many characteristics of D '' layer may be attributed to the recently discovered MgSiO3 post-perovskite phase without chemical heterogeneities. They include a sharp discontinuity at the top of D '', regional variation in seismic anisotropy, and a steep ...
Brodholt, JP +4 more
core
A seismological study of the mantle beneath Iceland [PDF]
, 2000 Iceland has long been thought to be underlain by a thermal upwelling, or plume, rising from deep within the mantle. This study tests this hypothesis, by a) seeking evidence for a plume in the lower mantle in azimuth anomalies at the NORSAR array and b ...
Pritchard, Matthew James +1 more
core
Coupling thermodynamic mineralogical models and mantle convection [PDF]
, 2007 In this thesis I advance the integration of mineral thermodynamics into convection modeling. I have compiled a thermodynamic model of mantle mineralogy in the five component CFMAS system (CaO-FeO-MgO-Al2O3-SiO2), including mineral phases that occur close
Piazzoni, Antonio Sebastiano
core +1 more source
Subducted Carbon From Mantle Plume in Mid‐Ocean Ridge Basalts
Geophysical Research LettersDeciphering the Earth's deep carbon cycle, from mantle plumes to mid‐ocean ridges, remains incompletely understood. In this study, we analyze the magnesium isotope composition of basalts collected from the South Mid‐Atlantic Ridge (SMAR), which have been
Haitao Zhang +5 more
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