Results 21 to 30 of about 776,982 (368)

Craton Destruction Induced by Drastic Drops in Lithospheric Mantle Viscosity

Earth and Space Science, Volume 9, Issue 12, December 2022., 2022
Abstract The disruption of the mantle roots of cratons is common after cratonization. Craton destruction, which is characterized by severe lithospheric thinning, extensive thrust and extensional deformation, basin filling, and intense thermal activities, is relatively rare and is generally attributed to intensely reduced viscosity contrasts between the
Lu Wang, Jia Liu, Qi‐Hu Xu, Qun‐Ke Xia   +3 more
wiley   +1 more source

Lithium Isotopic Compositions of Mesozoic and Cenozoic Basalts From South-Eastern China: Implications for Extremely Low δ7Li of Continental-Type Eclogites

Frontiers in Earth Science, 2022
Lithium isotope geochemical studies of oceanic-type eclogites benefited from previous investigation of altered oceanic crust; however, processes of lithium isotope exchange operating on altered protoliths of continental-type eclogites have remained ...
Cheng-Long Yu, Yilin Xiao, Yilin Xiao, Yang-Yang Wang, Olivier Nadeau, He Sun, He Sun, Hong-Qiong Wan, Dong-Yong Li, Xiao-Xia Wang, Dong-Bo Tan   +10 more
doaj   +1 more source

Metasomatized lithospheric mantle for Mesozoic giant gold deposits in the North China craton [PDF]

, 2020
The origin of giant lode gold deposits of Mesozoic age in the North China craton (NCC) is enigmatic because high-grade metamorphic ancient crust would be highly depleted in gold.
Becker, Harry, Cheng, Huai, Foley, Stephen, Geng, Xianlei, Liu, Yongsheng, Wang, Christina Yan, Wang, Zaicong, Wu, Fuyuan, Yang, Jinhui, Zong, Keqing   +9 more
core   +1 more source

A Proper Use of the Adjacent Land‐Based Observatory Magnetic Field Data to Account for the Geomagnetic Disturbances During Offshore Directional Drilling

Space Weather, Volume 20, Issue 12, December 2022., 2022
Abstract Directional drilling in the oil fields relies particularly on the “on‐fly” measurements of the natural magnetic field (measurements while drilling; MWD); the MWD are eventually used to construct the well path. These measurements are the superposition of the signals from the internal, core and crustal, and external, ionospheric and ...
Mikhail Kruglyakov, Alexey Kuvshinov, Manoj Nair   +2 more
wiley   +1 more source

Diverse Deformation Mechanisms and Lithologic Controls in an Active Orogenic Wedge: Structural Geology and Thermochronometry of the Eastern Greater Caucasus

Tectonics, Volume 41, Issue 12, December 2022., 2022
Abstract Orogenic wedges are common at convergent plate margins and deform internally to maintain a self‐similar geometry during growth. New structural mapping and thermochronometry data illustrate that the eastern Greater Caucasus mountain range of western Asia undergoes deformation via distinct mechanisms that correspond with contrasting lithologies ...
A. R. Tye, N. A. Niemi, E. Cowgill, F. A. Kadirov, G. R. Babayev   +4 more
wiley   +1 more source

SKS Splitting and Upper Mantle Anisotropy Beneath the Southern New England Appalachians: Constraints From the Dense SEISConn Array

Geochemistry, Geophysics, Geosystems, 2020
The geology of southern New England reflects subduction and terrane accretion during the Appalachian Orogeny and rifting during the breakup of Pangea.
Ethan Lopes, Maureen D. Long, Paul Karabinos, John C. Aragon   +3 more
doaj   +1 more source

Geology of the Monte Banchetta – Punta Rognosa area (Troncea valley, Western Alps)

Journal of Maps, 2021
The map ‘Geology of the Monte Banchetta – Punta Rognosa area (Troncea valley, Western Alps)’ details the lithostratigraphy and structural setting of a key sector in the Alpine chain, characterized by close associations of continental and oceanic ...
Alberto Corno, Pietro Mosca, Alessandro Borghi, Marco Gattiglio   +3 more
doaj   +1 more source

Adaptively Parameterized P-and S-wave Tomography in Africa: Assessing Deep Mantle Influence on Surface Geology

, 2023
Hesam Saeidi, Andrew A. Nyblade, Samantha E Hansen, Ryan Haag   +3 more
openaire   +2 more sources

101 geodynamic modelling: how to design, interpret, and communicate numerical studies of the solid Earth [PDF]

Solid Earth, 2022
Geodynamic modelling provides a powerful tool to investigate processes in the Earth's crust, mantle, and core that are not directly observable. However, numerical models are inherently subject to the assumptions and simplifications on which they are ...
I. van Zelst, I. van Zelst, F. Crameri, F. Crameri, A. E. Pusok, A. Glerum, J. Dannberg, C. Thieulot   +7 more
doaj   +1 more source

Collision Chains among the Terrestrial Planets. III. Formation of the Moon [PDF]

Planet. Sci. J. 2:200 (2021), 2021
In the canonical model of Moon formation, a Mars-sized protoplanet "Theia" collides with proto-Earth at close to their mutual escape velocity $v_{\rm esc}$ and a common impact angle 45{\deg}. The "graze-and-merge" collision strands a fraction of Theia's mantle into orbit, while Earth accretes most of Theia and its momentum.
arxiv   +1 more source