Results 21 to 30 of about 35,079 (237)

The statherian taphrogenesis of the South American Platform [PDF]

Brazilian Journal of Geology, 2022
Records of Statherian intracontinental ruptural tectonics, magmatism and sedimentation events are recognized all over the South American Platform as an immediate tectonic response to the formation of a large continental domain during Rhyacian-Orosirian ...
Benjamim Bley de Brito Neves, Reinhardt A. Fuck, Ginaldo Ademar da Cruz Campanha   +2 more
doaj   +1 more source

Eclogite Varieties and Their Positions in the Cratonic Mantle Lithosphere beneath Siberian Craton and Archean Cratons Worldwide

Minerals, 2022
The pressure-temperature (PT) conditions and position of different groups of eclogites in the sub-cratonic lithospheric mantle (SCLM) worldwide were established using clinopyroxene Jd-Di and garnet thermobarometry. Beneath Siberia, Fe-eclogites found within the 3.0–4.0 GPa formed in Early Archean times.
Ashchepkov, Igor, Logvinova, Alla, Spetsius, Zdislav, Downes, Hilary, Ntaflos, Theodoros, Ivanov, Alexandr, Zinchenko, Vladimir, Kostrovitsky, Sergey, Ovchinnikov, Yury   +8 more
openaire   +3 more sources

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

Transactions 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, Винод Кумар Сингх, Alexander Slabunov, Vinod Singh   +3 more
doaj   +1 more source

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

Geochemistry, 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, Saskia Goes, Marcelo Assumpção   +2 more
doaj   +1 more source

Effect of rheological heterogeneities on the lithospheric deformation of the Tibetan Plateau and neighbouring regions

Frontiers in Earth Science, 2023
The Tibetan Plateau, induced by the India-Eurasian collision, has the highest average altitude in the world. During its uplift vertically, the Tibetan Plateau has been considered to expand laterally.
Yujun Sun, Hailong Li, Taoyuan Fan, Bing Li   +3 more
doaj   +1 more source

Komatiites From Mantle Transition Zone Plumes

Frontiers 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

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

Geosystems 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, Alla Logvinova, Zdislav Spetsius, Hilary Downes   +3 more
doaj   +1 more source

MODELING THE STABILITY OF CRATONS CONTAINING PRE-EXISTING WEAKNESSES [PDF]

, 2021
Cratons are the ancient, typically Archean in age, stable interior of continental plates. They are thicker and more stable than the surrounding lithosphere due to their lithospheric mantle composition of depleted peridotite and limited interaction with ...
Conner, Shannon
core   +2 more sources

AFRP20: New P‐Wavespeed Model for the African Mantle Reveals Two Whole‐Mantle Plumes Below East Africa and Neoproterozoic Modification of the Tanzania Craton

Geochemistry, Geophysics, Geosystems, 2021
Africa's Cenozoic tectonism is often attributed to mantle plumes, particularly below East Africa, but their morphology, number, location, and impact on the African lithosphere are debated.
A. Boyce, I. D. Bastow, S. Cottaar, R. Kounoudis, J. Guilloud De Courbeville, E. Caunt, S. Desai   +6 more
doaj   +1 more source

The Relationship Between Kimberlitic Magmatism and Electrical Conductivity Anomalies in the Mantle

Geophysical Research Letters, 2022
Kimberlites are igneous rocks whose formation remains enigmatic due to their severely altered nature, highly variable compositions and rapid ascent through the lithosphere.
Sinan Özaydın, Kate Selway
doaj   +1 more source