Advances in seismic imaging of mantle transition zone discontinuities
地球与行星物理论评, 2023 Located between the 410-km and 660-km discontinuities, the mantle transition zone is the key region for understanding the thermal and chemical structure and the dynamic evolution of the Earth’s mantle.
Chunquan Yu +3 more
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Upper mantle melt caused by a subducted slab in the Indian-Eurasian continental subduction zone
Communications Earth & Environment, 2023 A low-velocity layer atop the mantle transition zone has been extensively observed worldwide. In subduction zones, this layer is widely explained as partial melting triggered by slab subduction on a regional or global scale. However, direct observational
Guohui Li +4 more
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The Structure and Elasticity of CaO3 Under High Pressure by First-Principles Simulation
Frontiers in Earth Science, 2022 The structure, electrical properties, elasticity, and anisotropy of the newly discovered mantle mineral, CaO3, are obtained under 10–50 GPa by first-principles simulation to understand their relations with the composition and structure of the mantle ...
Hanyu Wang +7 more
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Cold and Wet Mantle Transition Zone Beneath the Mediterranean Sea Revealed by the Electrical Image
Applied Sciences, 2023 A three-dimensional electrical conductivity model of the mantle beneath North Africa and Southern Europe is obtained by geomagnetic depth sounding. C-responses are estimated from geomagnetic data observed at observatories in and around the region and ...
Shiwen Li, Yunhe Liu
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Scientific Reports, 2021 Rare oceanic diamonds are believed to have a mantle transition zone origin like super-deep continental diamonds. However, oceanic diamonds have a homogeneous and organic-like light carbon isotope signature (δ13C − 28 to − 20‰) instead of the extremely ...
Luc S. Doucet +2 more
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Speed structure of the mantle of the border of the Eastern European and West European platforms
Геофизический журнал, 2021 This work is devoted to studying the velocity structure of the mantle of the border area of the East European and West European platforms in the crust separated by the Teiserre-Tornquist zone.
T. A. Tsvetkova +2 more
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Dehydration Melting Below the Undersaturated Transition Zone
Geochemistry, Geophysics, Geosystems, 2020 A reflector 70–130 km below the base of the transition zone beneath Tibet is observed in receiver functions and underside seismic reflections, at depths consistent with the transition of garnet to bridgmanite.
W. R. Panero +5 more
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Iron disproportionation in peridotite fragments from the mantle transition zone. [PDF]
Nat CommunAbstract Previous high-temperature-pressure experiments predicted metallic iron’s potential presence in the deep mantle below 250 km, arising from ferrous disproportionation in silicates, which could profoundly impact the redox environment and physicochemical properties.
Pan F +10 more
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Mantle Transition Zone Structure beneath Kenya and Tanzania: More Evidence for a Deep-Seated Thermal Upwelling in the Mantle [PDF]
, 2009 Here we investigate the thermal structure of the mantle beneath the eastern Branch of the East African Rift system in Kenya and Tanzania. We focus on the structure of the mantle transition zone, as delineated by stacking of receiver functions. The top of
Huerta, Audrey D. +2 more
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THE STRUCTURE OF LOW-VELOCITY ZONES IN THE MANTLE OF THE NORTHERN EUROPE
Transactions of the Karelian Research Centre of the Russian Academy of Sciences, 2015 The areas of low-velocity middle mantle shift into the transition zone are distinguished according to 3-d P-velocity model of the Fennoscandian shield mantle and its surroundings using Taylor approximation method.
Татьяна Цветкова +5 more
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