Results 11 to 20 of about 31,153 (271)

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  

+19 more sources

Large Igneous Province Record Through Time and Implications for Secular Environmental Changes and Geological Time‐Scale Boundaries

open access: yesGeophysical Monograph Series, Page 1-26., 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.
Richard E. Ernst   +8 more
wiley  

+5 more sources

Plume‐Induced Subduction Initiation: Single‐Slab or Multi‐Slab Subduction? [PDF]

open access: yesGeochemistry, Geophysics, Geosystems, 2020
AbstractInitiation of subduction following the impingement of a hot buoyant mantle plume is one of the few scenarios that allow breaking the lithosphere and recycling a stagnant lid without requiring any preexisting weak zones. Here, we investigate factors controlling the number and shape of retreating subducting slabs formed by plume‐lithosphere ...
Marzieh Baes   +3 more
openaire   +6 more sources

Subducting carbon

open access: yesNature, 2019
A hidden carbon cycle exists inside Earth. Every year, megatons of carbon disappear into subduction zones, affecting atmospheric carbon dioxide and oxygen over Earth’s history. Here we discuss the processes that move carbon towards subduction zones and transform it into fluids, magmas, volcanic gases and diamonds.
Plank, Terry A., Manning, Craig
openaire   +3 more sources

Evolution of Subduction Cusps From the Perspective of Trench Migration and Slab Morphology

open access: yesFrontiers in Earth Science, 2021
The geometries of trenches vary worldwide due to continuous plate boundary reorganization. When two trenches intersect to generate a corner, a subduction cusp is formed.
Hui Zhao   +5 more
doaj   +1 more source

Granite subduction: Arc subduction, tectonic erosion and sediment subduction

open access: yesGondwana Research, 2009
Abstract Continental growth has been episodic, reflecting the episodic nature of mantle dynamics as well as surface dynamics of the Earth, the net result of which is exhibited by the present mantle with two huge reservoirs of TTG rocks, one on the surface continents and the other on the D″ layer on the Core-Mantle Boundary (CMB).
Shinji Yamamoto   +4 more
openaire   +2 more sources

Geodynamic modeling on subduction-spreading interaction and implications for the South China Sea and surrounding regions

open access: yesGeosystems and Geoenvironment, 2023
The convergent subduction zones and the divergent spreading ridges are essential tectonic units that are widely distributed in the South China Sea and the surrounding regions, governing the regional tectonic evolution.
Jie Liao   +5 more
doaj   +1 more source

Wet subduction versus cold subduction

open access: yesGeophysical Research Letters, 2005
In situ X‐ray diffraction study of post‐spinel transformation in hydrous peridotite (2 wt.% H2O) indicates that the phase boundary is shifted to higher pressures by 0.6 GPa relative to anhydrous peridotite at 1473 K, whereas, it shows no obvious shift at high temperature around 1873 K. A linear equation for the boundary is P (GPa) = −0.002 T (K) + 26.3,
Konstantin D. Litasov   +4 more
openaire   +1 more source

Ocean-continent subduction cannot be initiated without preceding intra-oceanic subduction!

open access: yesFrontiers in Earth Science, 2022
The formation of new subduction zones is a key element of plate tectonics and the Wilson cycle, and many different controlling mechanisms have been proposed to initiate subduction.
Alexander Koptev   +4 more
doaj   +1 more source

Aseismic ridge subduction and flat subduction: Insights from three-dimensional numerical models

open access: yesEarth and Planetary Physics, 2023
Flat subduction can significantly influence the distribution of volcanism, stress state, and surface topography of the overriding plate. However, the mechanisms for inducing flat subduction remain controversial.
Hui Zhao, Wei Leng
doaj   +1 more source

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