Phase relations and equation of state of a natural MORB: Implications for the density profile of subducted oceanic crust in the Earth's lower mantle

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Subfields: Geophysics

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Reconciling dynamic and seismic models of Earth's lower mantle: The dominant role of thermal heterogeneity (2012, background): “A range of basaltic compositions have been proposed (e.g. Irifune and Ringwood, 1993; Ricolleau et al., 2010; Nakagawa et al., 2010), but all have significant proportions of calcium-perovskite and stishovite, when compared to a pyrolite.”
Dynamics and evolution of the deep mantle resulting from thermal, chemical, phase and melting effects (2012, background): “…kg/m3 denser and Hirose et al. (2005) finding it 200–300 kg/m3 denser throughout lower mantle, which corresponds to 3.5–5.3% at the CMB. Recently, Ricolleau et al. (2010) measured the phase assemblages and densities of a natural MORB sample at up to 89 GPa, then calculated the density profile…”