Results 11 to 20 of about 8,887 (226)

Bundelkhand, Aravalli and Dharwar cratons Indian Shield: comparison of Archean crustal evolution and location in the Kenorland Supercontinent structure

open access: yesTransactions of the Karelian Research Centre of the Russian Academy of Sciences, 2020
Comparison of the Meso-Neoarchean crustal evolution of the Bundelkhand, Aravalli, Western and Eastern Dharwar Cratons shows that geodynamic mechanisms, similar to modern plate-tectonic and mantle-plume mechanisms, were active in that period.
Александр Иванович Слабунов   +3 more
doaj   +1 more source

Crustal Groundwater Volumes Greater Than Previously Thought

open access: yesGeophysical Research Letters, 2021
Global groundwater volumes in the upper 2 km of the Earth's continental crust—critical for water security—are well estimated. Beyond these depths, a vast body of largely saline and non‐potable groundwater exists down to at least 10 km—a volume that has ...
Grant Ferguson   +10 more
doaj   +1 more source

Thermobarometry of diamond inclusions: Mantle structure and evolution beneath Archean cratons and mobile belts worldwide

open access: yesGeosystems and Geoenvironment, 2023
Thermobarometric calculations for mineral inclusions in diamonds provide a systematic comparison of P-T-fO2 conditions for different cratons and mobile belts worldwide, using a database of 4440 mineral EPMA analyses.
Igor Ashchepkov   +3 more
doaj   +1 more source

Komatiites From Mantle Transition Zone Plumes

open access: yesFrontiers in Earth Science, 2020
During the Archean, episodic volcanism commonly included both plume- and arc-type magmatism, raising the issue of a possible link between “bottom up” and “top down” geodynamic processes.
Derek Wyman
doaj   +1 more source

Thermo‐Compositional Structure of the South American Platform Lithosphere: Evidence of Stability, Modification, and Erosion

open access: yesGeochemistry, Geophysics, Geosystems, 2022
Constraints on the structure of cratonic lithosphere are essential to improve our understanding of craton formation, evolution and long‐term stability.
Isabella Altoe   +2 more
doaj   +1 more source

Crustal Structure beneath the Precambrian Cratons of Gondwanaland and Its Evolution Using Teleseismic Receiver Function

open access: yesLithosphere, 2022
The Gondwana supercontinent was an accretion of several cratons from different landmasses, namely South America, Antarctica, Africa, Madagascar, Australia, and the Indian subcontinent.
Pousali Mukherjee   +2 more
doaj   +1 more source

Criteries and prospects of diamonds of the Vitebsk granulite massif

open access: yesЖурнал Белорусского государственного университета: География, геология, 2021
The article describes the history of studying the diamond content of tectonic structures of the territory of Belarus. Based on the results of magnetometric, mineralogical, tectonic studies carried out by industrial geologists and scientists over the past
Victor S. Konishchev   +1 more
doaj   +1 more source

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

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

Seismological structure of the 1.8 Ga Trans-Hudson Orogen of North America [PDF]

open access: yes, 2016
Precambrian tectonic processes are debated: what was the nature and scale of orogenic events on the younger, hotter, and more ductile Earth? Northern Hudson Bay records the Paleoproterozoic collision between the Western Churchill and Superior plates—the ∼
Abbott   +62 more
core   +1 more source

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