Search Results - "P. Brodholt, John"

Core formation and core composition from coupled geochemical and geophysical constraints by Badro, James, Brodholt, John P., Piet, Hélène, Siebert, Julien, Ryerson, Frederick J.

“…The formation of Earth’s core left behind geophysical and geochemical signatures in both the core and mantle that remain to this day. Seismology requires that…”
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seismologically consistent compositional model of Earth’s core by Badro, James, Côté, Alexander S., Brodholt, John P.

“…Earth’s core is less dense than iron, and therefore it must contain “light elements,” such as S, Si, O, or C. We use ab initio molecular dynamics to calculate…”
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Primitive noble gases sampled from ocean island basalts cannot be from the Earth’s core by Li, Yunguo, Vočadlo, Lidunka, Ballentine, Chris, Brodholt, John P.

“…Noble gas isotopes in plumes require a source of primitive volatiles largely isolated in the Earth for 4.5 Gyrs. Among the proposed reservoirs, the core is…”
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Early planetesimal differentiation and late accretion shaped Earth’s nitrogen budget by Wang, Wenzhong, Walter, Michael J., Brodholt, John P., Huang, Shichun

“…The relative roles of protoplanetary differentiation versus late accretion in establishing Earth’s life-essential volatile element inventory are being hotly…”
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Elastic properties of ferropericlase at lower mantle conditions and its relevance to ULVZs by Muir, Joshua M.R., Brodholt, John P.

“…The elasticity of FexMg1−xO was examined under lowermost mantle temperature and pressure conditions using density functional theory (DFT). The addition of iron…”
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Modeling the melting of multicomponent systems: the case of MgSiO3 perovskite under lower mantle conditions by Di Paola, Cono, P. Brodholt, John

“…Knowledge of the melting properties of materials, especially at extreme pressure conditions, represents a long-standing scientific challenge. For instance,…”
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Anisotropic diffusion creep in postperovskite provides a new model for deformation at the core–mantle boundary by Dobson, David P., Lindsay-Scott, Alexander, Hunt, Simon A., Bailey, Edward, Wood, Ian G., Brodholt, John P., Vocadlo, Lidunka, Wheeler, John

“…The lowermost portion of Earth’s mantle (D″) above the core–mantle boundary shows anomalous seismic features, such as strong seismic anisotropy, related to the…”
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Variation of thermal conductivity and heat flux at the Earth's core mantle boundary by Ammann, Michael W., Walker, Andrew M., Stackhouse, Stephen, Wookey, James, Forte, Alessandro M., Brodholt, John P., Dobson, David P.

“…The two convective systems that dominate Earth's internal dynamics meet at the boundary between the rocky mantle and metallic liquid core. Energy transfer…”
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Subducted banded iron formations as a source of ultralow-velocity zones at the core-mantle boundary by Dobson, David P, Brodholt, John P

“…Ultralow-velocity zones (ULVZs) are regions of the Earth's core-mantle boundary about 1-10 kilometres thick exhibiting seismic velocities that are lower than…”
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The phase diagrams of KCaF3 and NaMgF3 by ab initio simulations by Jakymiw, Clément, Vočadlo, Lidunka, Dobson, David P., Bailey, Edward, Thomson, Andrew R., Brodholt, John P., Wood, Ian G., Lindsay-Scott, Alex

“…ABF 3 compounds have been found to make valuable low-pressure analogues for high-pressure silicate phases that are present in the Earth’s deep interior and…”
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Weakening of calcium iridate during its transformation from perovskite to post-perovskite by Dobson, David P, Hunt, Simon A, Weidner, Donald J, Li, Li, Wang, Liping, Walte, Nicolas P, Brodholt, John P

“…The lowermost part of the Earth's mantle-the ∼200-km-thick D′′ layer-shows anomalous seismic properties, and is rheologically distinct from the rest of the…”
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Ab initio simulations of iron–nickel alloys at Earth's core conditions by Côté, Alexander S., Vocˇadlo, Lidunka, Brodholt, John P.

“…We report ab initio density functional theory calculations on iron–nickel (FeNi) alloys at conditions representative of the Earth's inner core. We test…”
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Pressure-induced changes in the compression mechanism of aluminous perovskite in the Earth's mantle by Brodholt, John P

“…Although aluminium is the fifth most abundant element in the Earth's mantle, its effect on the physical properties of perovskite, the main mineral phase in the…”
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The Earth’s core as a reservoir of water by Li, Yunguo, Vočadlo, Lidunka, Sun, Tao, Brodholt, John P.

“…Current estimates of the budget and distribution of water in the Earth have large uncertainties, most of which are due to the lack of information about the…”
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The elastic properties of hcp-Fe alloys under the conditions of the Earth's inner core by Li, Yunguo, Vočadlo, Lidunka, Brodholt, John P.

“…Geophysical and cosmochemical constraints suggest the inner-core is mainly composed of iron with a few percent of light elements. However, despite extensive…”
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Elastic, thermal and structural properties of platinum by Ono, Shigeaki, Brodholt, John P., David Price, G.

“…The thermal equation of state (EOS) for platinum has been calculated to 300 GPa and 3000 K using ab initio molecular dynamics employing the local density…”
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Elastic anisotropy of FeSiO3 end-members of the perovskite and post-perovskite phases by Stackhouse, Stephen, Brodholt, John P., Price, G. David

“…The athermal elastic constants of the perovskite and post‐perovskite polymorphs of pure end‐member FeSiO3 were calculated from ab initio calculations. We…”
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The elastic constants of MgSiO3 perovskite at pressures and temperatures of the Earth's mantle by OGANOV, Artem R, BRODHOLT, John P, PRICE, G. David

“…The temperature anomalies in the Earth's mantle associated with thermal convection can be inferred from seismic tomography, provided that the elastic…”
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Ab initio elasticity and thermal equation of state of MgSiO3 perovskite by Oganov, Artem R, Brodholt, John P, Price, G.David

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Light elements in the core: Effects of impurities on the phase diagram of iron by COTE, Alexander S, VOCADLO, Lidunka, BRODHOLT, John P

“…The stable phase of iron (Fe) in the Earth's core has been the subject of extensive studies, yet still remains controversial. Hexagonal close‐packed structure…”
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