Results 91 to 100 of about 3,197,364 (211)

Scattered energy from a rough core‐mantle boundary modeled by a Monte Carlo seismic particle method: Application to PKKP precursors

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
doaj   +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., Debayle, E., McKenzie, D. P., Tatar, M., Priestley, K. F.   +4 more
core   +1 more source

“Building the Plane as We Fly It”: Examining the Current Pathways for Disclosure of Gender‐Based Violence in Sport in Australia

Gender, Work &Organization, EarlyView.
ABSTRACT This article examines how gendered institutional arrangements in Australian sport shape the reporting of gender‐based violence (GBV) against adult women and gender‐diverse people. Using feminist institutionalism, we analyze the formal and informal rules that structure sport integrity systems and the gendered power relations they reproduce ...
Samantha Marshall, Natalie Galea, Aurélie Pankowiak, Mary N. Woessner, Kirsty Forsdike   +4 more
wiley   +1 more source

Melting and defect transitions in FeO up to pressures of Earth's core-mantle boundary. [PDF]

Nat Commun, 2023
Dobrosavljevic VV, Zhang D, Sturhahn W, Chariton S, Prakapenka VB, Zhao J, Toellner TS, Pardo OS, Jackson JM.   +8 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, Hirose, K, Yuen, DA, Cormier, VF, Karato, S   +4 more
core  

The ‘Geopolitical Commission’: 40 Years in the Making?

JCMS: Journal of Common Market Studies, EarlyView.
Abstract In 2019, European Commission President Ursula von der Leyen promised MEPs she would deliver a ‘Geopolitical Commission’ during the five years of her term in office, unbeknown that the COVID‐19 pandemic and the Russian invasion of Ukraine were around the corner.
Robert Kissack
wiley   +1 more source

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, Pritchard, M.J.   +1 more
core  

Metamorphic or Igneous Zircon? Classification Through Rare Earth Elements, Machine Learning and Logistic Regression

Journal of Metamorphic Geology, EarlyView.
ABSTRACT Zircon is a common, highly refractory accessory mineral found in sedimentary, igneous and metamorphic rocks that forms through various processes (e.g., magmatic, hydrothermal, metamorphic growth and recrystallization). Trace element compositions of detrital zircon have been widely applied to understanding tectonic processes and continental ...
Jarrod M. Burges, Chris Yakymchuk, Michael P. DiMaio, Timothy C. C. Lui, Anirudh Prabhu, Shaunna M. Morrison   +5 more
wiley   +1 more source

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

Globally distributed subducted materials along the Earth's core-mantle boundary: Implications for ultralow velocity zones. [PDF]

Sci Adv, 2023
Hansen SE, Garnero EJ, Li M, Shim SH, Rost S.   +4 more
europepmc   +1 more source