Composition and temperature of the Earth's core constrained by combining ab initio calculations and seismic data

By Dario Alfè, Michael J. Gillan, G. D. Price. 2002

291 citations recorded by the source corpus.

Subfields: Geophysics, Molecular Biology

View Paper: https://www.semanticscholar.org/paper/6465b434d6bae932405d96c0e364cb38b7e9bfdc

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Citations in the corpus

Heterogeneous accretion, composition and core–mantle differentiation of the Earth (2011, background): “…that the density difference between the inner and outer core is only consistent with the presence of a significant concentration of oxygen in the outer core, because ab initio calculations show it to be the only element that is suitably insoluble in the solid inner core (Alfè et al., 2002).”
Melting in the Fe–C system to 70 GPa (2009, background): “…Several possible contenders have been proposed for the alloying elements, including 39 hydrogen, carbon, oxygen, silicon and sulfur (Poirier, 1994), with the popularity of each waxing 40 and waning, and some mixture seems most likely (e.g. Alfè et al., 2002; Badro et al., 2007; 41 McDonough, 2003).”
Phase relations in the Fe-FeSi system at high pressures and temperatures (2013, background): “…51 et al., 2010), to ~6-7 wt% (Allègre et al., 1995, Brosh et al., 2009; Javoy et al., 2010; McDonough, 52 2003; Shahar et al., 2009), to 8-12 wt% (Alfè et al., 2002; Asanuma et al., 2011; Fischer et al., 53 2012; Lin et al., 2003; Ricolleau et al., 2011; Rubie et al., 2011), to up to 20 wt%…”
MASS–RADIUS RELATION FOR ROCKY PLANETS BASED ON PREM (2015, background): “The lighter elements could be S, Si, O, C, or a combination of them (Badro et al. 2007; Fischer et al. 2012; Alfè et al. 2002; Poirier 1994; Stixrude et al. 1997; Anderson & Ahrens 1994), but no agreement is reached as to which of these elements are most important.”
Thermal and magnetic evolution of the Earth’s core (2003, background): “(3) Tad(r, t) = Ts [c(t)] exp [ − ∫ r c(t) αg CP dr′ ] , (9) where the boundary condition that the temperature at the ICB (r = c(t)) is equal to the temperature of crystallization at this placeTs[c(t)] has been used.”
Effect of light elements on the sound velocities in solid iron: Implications for the composition of Earth's core (2006, background): “Theoretical calculations [33] show that the (weightconverted) partition coefficient for silicon, sulphur and oxygen between the liquid and solid phases of iron is”
The properties of iron under core conditions from first principles calculations (2003, methodology): “Ball, 1989), alternatively we could use molecular dynamics techniques. Matsui et al. (1994)have shown, however, that the inherent anharmonicity associated with lattice dynamics decreases with increasing pressure, and the two techniques give very similar results for very high pressure and temperature”
Composition of the Earth's inner core from high-pressure sound velocity measurements in Fe–Ni–Si alloys (2010, methodology): “If we assume a molar partition coefficient for silicon 230 between the liquid and solid phase of iron of 1.2 DLiq/Sol 1.9 [Alfe et al., 2002], we obtain 231 a core composition with Si ranging from 1.2 to 4 wt%, for an inner core containing 1 to 2 232 wt% of Si.”