Results 11 to 20 of about 1,513,041 (268)

Nitrogen Diffusion in Calcite

open access: yesGeophysical Monograph Series, Page 97-104., 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 ...
Daniele Cherniak   +2 more
wiley  

+21 more sources

The Osmium Isotope Signature of Phanerozoic Large Igneous Provinces

open access: yesGeophysical Monograph Series, Page 229-246., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Alexander J. Dickson   +2 more
wiley  

+12 more sources

Multiscale modeling of upper mantle plasticity: From single-crystal rheology to multiphase aggregate deformation [PDF]

open access: yes, 2014
We report a first application of an improved second-order (SO) viscoplastic self-consistent model for multiphase aggregates, applied to an olivine + diopside aggregate as analogue for a dry upper mantle peridotite deformed at 10 15 s 1 shear strain rate ...
CORDIER, Patrick   +6 more
core   +1 more source

Seismic velocities in mantle minerals and the mineralogy of the upper mantle [PDF]

open access: yesJournal of Geophysical Research: Solid Earth, 1989
Comparison of seismic velocities in mantle minerals, under mantle conditions, with seismic data is a first step toward constraining mantle chemistry. The calculation, however, is uncertain due to lack of data on certain physical properties. “Global” systematics have not proved very useful in estimating these properties, particularly for the shear ...
Duffy, Thomas S., Anderson, Don L.
openaire   +2 more sources

Depth-dependent density change within the continental upper mantle

open access: yesContributions to Geophysics and Geodesy, 2012
The empirical model of the depth-dependent density change within the upper continental mantle is derived in this study. The density of the upper(most) mantle underlying the continental crust is obtained from the estimated values of the crust–mantle (Moho)
Robert TENZER   +2 more
doaj   +1 more source

Hemispheric Geochemical Dichotomy of the Mantle Is a Legacy of Austral Supercontinent Assembly and Onset of Deep Continental Crust Subduction

open access: yesAGU Advances, 2022
Oceanic hotspots with extreme enriched mantle radiogenic isotopic signatures—including low 143Nd/144Nd indicative of subducted continental crust—are linked to plume conduits sampling the southern hemispheric mantle.
M. G. Jackson, F. A. Macdonald
doaj   +1 more source

Tertiary-Quaternary intra-plate magmatism in Europe and its relationship to mantle dynamics [PDF]

open access: yes, 2006
Anorogenic intra-plate magmatism was widespread in Europe from early Tertiary to Recent times, extending west to east from Spain to Bulgaria, and south to north from Sicily to northern Germany. Magmatism is spatially and temporally associated with Alpine-
Wilson, M., Downes, Hilary
core   +5 more sources

Mantle roots of the Emeishan plume: an evaluation based on teleseismic P-wave tomography [PDF]

open access: yesSolid Earth, 2017
The voluminous magmatism associated with large igneous provinces (LIPs) is commonly correlated to upwelling plumes from the core–mantle boundary (CMB). Here we analyse seismic tomographic data from the Emeishan LIP in southwestern China.
C. He, M. Santosh, M. Santosh
doaj   +1 more source

Mantle transition zone structure beneath India and Western China from migration of PP and SS precursors [PDF]

open access: yes, 2014
We investigate the seismic structure of the upper-mantle and mantle transition zone beneath India and Western China using PP and SS underside reflections offseismic discontinuities, which arrive as precursors to the PP and SS arrival.
Dobson, DP   +11 more
core   +1 more source

Kinematic Representations of Linear and Power‐Law Viscoelastic Deformation Through the Earthquake Cycle

open access: yesGeophysical Research Letters, 2022
Viscoelastic deformation below the Earth's elastic crust is modulated by stresses generated by both plate tectonic and earthquake cycle processes.
Brendan J. Meade   +2 more
doaj   +1 more source

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