Results 11 to 20 of about 16,754 (235)

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  

+11 more sources

Phase Diagrams of Carbonate Materials at High Pressures, with Implications for Melting and Carbon Cycling in the Deep Earth

open access: yesGeophysical Monograph Series, Page 137-165., 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 ...
Konstantin Litasov   +3 more
wiley  

+3 more sources

Building Archean cratonic roots

open access: yesFrontiers in Earth Science, 2022
Geophysical, geochemical, and geological investigations have attributed the stable behaviour of Earth's continents to the presence of their Archean cratonic roots. These roots are likely composed of melt-depleted, low density residual peridotite with high Magnesium number (Mg#), while devolatilisation from the upper mantle during magmatic events might ...
Charitra Jain   +6 more
openaire   +5 more sources

Tectonic depressions on the East-European and Siberian platforms: numerical modeling of convection beneath the Eurasian continent

open access: yesГеодинамика и тектонофизика, 2021
In modern concepts, the upper mantle of the Earth is a highly viscous incompressible liquid, and its flow is described using the Navier – Stokes equations in the Oberbeck – Boussinesq and geodynamic approximations.
V. V. Chervov   +2 more
doaj   +1 more source

Convective Self‐Compression of Cratons and the Stabilization of Old Lithosphere

open access: yesGeophysical Research Letters, 2023
Despite being exposed to convective stresses for much of the Earth's history, cratonic roots appear capable of resisting mantle shearing. This tectonic stability can be attributed to the neutral density and higher strength of cratons. However, the excess
Jyotirmoy Paul   +3 more
doaj   +1 more source

Deep continental roots and cratons [PDF]

open access: yesNature, 2021
The formation and preservation of cratons-the oldest parts of the continents, comprising over 60 per cent of the continental landmass-remains an enduring problem. Key to craton development is how and when the thick strong mantle roots that underlie these regions formed and evolved.
D. Graham Pearson   +8 more
openaire   +5 more sources

Crustal and Upper Mantle Shear Wave Velocity Structure of Botswana: The 3 April 2017 Central Botswana Earthquake Linked to the East African Rift System

open access: yesGeophysical Research Letters, 2020
Rayleigh wave group and phase velocity measurements obtained from ambient noise and earthquake data at 51 broadband stations were used to construct the first 3‐D crustal and upper mantle shear wave velocity model of Botswana.
Islam Fadel   +6 more
doaj   +1 more source

Differential Phanerozoic evolution of cratonic and non-cratonic lithosphere from a thermochronological perspective: São Francisco Craton and marginal orogens (Brazil) [PDF]

open access: yesGondwana Research, 2021
Abstract The Sao Francisco Craton (SFC) and its marginal Aracuai and Brasilia orogens exhibit a significant diversity in their lithospheric architecture. These orogens were shaped during the Neoproterozoic–Cambrian amalgamation of West Gondwana. The rigid cratonic lithosphere of the SFC and the relatively weak lithosphere of the Aracuai Orogen were ...
Ana Fonseca   +5 more
openaire   +2 more sources

Aulacogens, the Donets Basin (Eastern Ukraine, Southwestern Russia), and the new classification of rifts: Towards a proper terminology [PDF]

open access: yesGeološki Anali Balkanskoga Poluostrva, 2012
Some intra-cratonic basins are traditionally called “aulacogens”. This term has persisted in the geoscience literature since its invention by Soviet geologists in the mid-20th century before the triumph of the plate tectonics, but its meaning ...
Ruban Dmitry A.
doaj   +1 more source

Heat Transfer and Production in Cratonic Continental Crust: U‐Pb Thermochronology of Xenoliths From the Siberian Craton

open access: yesGeochemistry, Geophysics, Geosystems, 2022
Coupled U‐Pb and trace‐element analyses of accessory phases in crustal xenoliths from the Late Devonian Udachnaya kimberlite (Siberian craton, Russia) are used to constrain Moho temperature and crustal heat production at the time of kimberlite eruption ...
Francisco E. Apen   +6 more
doaj   +1 more source

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