Results 131 to 140 of about 406 (161)

Bridgmanite across the lower mantle

Nature Geoscience, 2022
Earth’s most abundant mineral — bridgmanite — lies hidden in the lower mantle, but Li Zhang is hopeful that advances in analytical techniques may reveal the inner workings of our world.
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The grain growth kinetics of bridgmanite at the topmost lower mantle

Earth and Planetary Science Letters, 2021
Abstract The grain size of minerals is an important parameter that controls mantle dynamics. We investigated the grain growth kinetics of bridgmanite that coexists with ferropericlase by multi-anvil experiments at 27 GPa, 1400-2400 K, corresponding to the topmost lower mantle conditions.
Ulrich Faul, Tomoo Katsura, Hongzhan Fei   +2 more
exaly   +2 more sources

Melting of Bridgmanite Under Hydrous Shallow Lower Mantle Conditions

Journal of Geophysical Research: Solid Earth, 2021
Abstract High pressure and temperature experiments were carried out on the oxide mixtures corresponding to the bridgmanite stoichiometry under the hydrous shallow lower mantle conditions (24–25 GPa and 1673–1873 K with 5–10 wt. % of water in the starting material). Oxide mixtures investigated correspond to MgSiO
George Amulele, Shun-ichiro Karato, Jennifer Girard   +2 more
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Bridgmanite—named at last

Science, 2014
The most abundant mineral in Earth's interior gets a name [Also see Report by Tschauner et al. ]
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Radiometric temperature determination in nongray bridgmanite

2021
Experiments in laser-heated diamond anvil cells (LH DACs) are conducted to assess phase diagrams of planetary materials at high pressure-temperature (P-T) conditions; thus, reliable determination of temperature in LH DAC experiments is essential.
Lobanov, Sergey S. (Dr.), Speziale, Sergio, Lin, Jung-Fu, Schifferle, Lukas (Dr.), Schreiber, Anja   +4 more
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Il mistero della Bridgmanite

2014
Finora non era mai stato possibile osservare la sua struttura originaria. Un gruppo di ricercatori ha studiato la superficie del meteorite caduto in Australia nel 1879 perché presenta caratteristiche simili a quelle presenti nel ...
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The potential for bridgmanite megacrysts to drive magma ocean segregation

Nature
Earth's early mantle probably existed as a deep, vigorously convecting magma ocean, and its solidification is considered central to the long-term chemical and dynamical evolution of the planet. Yet a notable uncertainty is the grain size of bridgmanite-the dominant lower-mantle phase-whose nucleation behaviour at extreme pressure has remained ...
Jie Deng, Junwei Hu, Yidi Shi, Jina Lee, Haiyang Niu, Lars Stixrude   +5 more
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Hydrogen incorporation mechanism in the lower-mantle bridgmanite

American Mineralogist
Abstract Bridgmanite, the most abundant mineral in the lower mantle, can play an essential role in deep-Earth hydrogen storage and circulation processes. To better evaluate the hydrogen storage capacity and its substitution mechanism in bridgmanite occurring in nature, we have synthesized high-quality single-crystal bridgmanite with a ...
Narangoo Purevjav, Naotaka Tomioka, Shigeru Yamashita, Keiji Shinoda, Sachio Kobayashi, Kenji Shimizu, Motoo Ito, Suyu Fu, Jesse Gu, Christina Hoffmann, Jung-Fu Lin, Takuo Okuchi   +11 more
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The importance of phase morphology for rheology of ferropericlase-bridgmanite mixtures

2021
<p>The rheology of the Earth’s lower mantle is poorly constrained due to a lack of knowledge of the rheological behaviour of its constituent minerals. In addition, the lower mantle does not consist of only a single, but of multiple mineral phases with differing deformation behaviour.
Marcel Thielmann, Gregor Golabek, Hauke Marquardt   +2 more
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Solubility of water in bridgmanite

Acta Geochimica, 2023
Wenhua Lu, Yuan Li
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