Results 71 to 80 of about 406 (161)
Partitioning of Iron Between (Mg,Fe)SiO3 Liquid and Bridgmanite
Geophysical Research LettersThe evolution of the magma ocean that occupied the early Earth is influenced by the buoyancy of crystals in silicate liquid. At lower mantle pressures, silicate crystals are denser than the iso‐chemical liquid, but heavy elements like iron can cause ...
Francis Dragulet, Lars Stixrude
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Penetration of Warm Slabs Across the 660 km Boundary: The Potential Role of Hydrous Stishovite
Geophysical Research LettersWe investigate the phase boundary of hydrous/anhydrous post‐spinel transition at conditions relevant to the 660 km boundary. For the hydrous ringwoodite decomposition, the slope is found to range from negative to positive values depending on the ...
Rabindranath Mondal, Swastika Chatterjee
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Matter and Radiation at Extremes, 2017 Recent advances in experimental techniques and data processing allow in situ determination of mineral crystal structure and chemistry up to Mbar pressures in a laser-heated diamond anvil cell (DAC), providing the fundamental information of the ...
Hongsheng Yuan, Li Zhang
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Frontiers in Earth Science, 2019 Metallic melt containing iron (Fe) and carbon (C) may be present at depths greater than 250 km inside the Earth. Depending on its wetting behavior, such dense melt may be trapped locally or drain into deep mantle and core.
Junjie Dong +3 more
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Synthesis of Bridgmanite Using a Multi-Anvil Apparatus
This record contains the detailed information for synthesizing two bridgmanite samples (I1567-1 and S7573) using a multi-anvil apparatus, including starting materials, synthesis method, and major-element compositions.
Lu, Wenhua +3 more
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Depth Dependent Deformation and Anisotropy of Pyrolite in the Earth's Lower Mantle
Geophysical Research LettersSeismic anisotropy is a powerful tool to map deformation processes in the deep Earth. Below 660 km, however, observations are scarce and conflicting.
Jeffrey P. Gay +7 more
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Thermoelastic properties of bridgmanite using deep-potential molecular dynamics
Physical Review BMgSiO_3-perovskite (MgPv) plays a crucial role in the Earth's lower mantle. This study combines deep-learning potential (DP) with density functional theory (DFT) to investigate the structural and elastic properties of MgPv under lower mantle conditions.
Tianqi Wan +3 more
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Dislocation creep may control bridgmanite deformation in the Earth’s lower mantle
Communications Earth & EnvironmentSeismic anisotropy in the Earth’s lower mantle, particularly around subduction zones, is commonly attributed to deformation by dislocation creep, yet much of the lower mantle appears nearly isotropic.
Longli Guan +6 more
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High Sodium Solubility in Magnesiowüstite in Iron‐Rich Deep Lower Mantle
Geochemistry, Geophysics, Geosystems(Mg,Fe)O ferropericlase‐magnesiowüstite has been proposed to host the majority of Earth's sodium, but the mechanism and capacity for incorporating the alkali cation remain unclear.
Susannah M. Dorfman +5 more
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Early-crystalized bridgmanite as a source of primitive noble gases
Abstract Ocean island basalts (OIB) provide a unique window into the deep Earth, with one of the most valuable signals coming from the He and Ne noble gases. The isotopes of these elements point to a “primitive” volatile reservoir in the deep interior that has remained far less degassed than the upper mantle sampled by MORBs.
Yunguo Li +5 more
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