A crystallizing dense magma ocean at the base of the Earth’s mantle

By Stéphane Labrosse, J. Hernlund, N. Coltice. Nature, 2007

792 citations recorded by the source corpus.

Subfields: Geophysics, Molecular Biology

View Paper: https://www.semanticscholar.org/paper/e1f8bb5abf827e08e77306aabbaa23c72092e464

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Citations in the corpus

Thermal evolution of the core with a high thermal conductivity (2014, neutral): “This is the reason behind the basal magma ocean model (Labrosse et al., 2007) which argues that ULVZs are the remnant of a once much thicker magma ocean.”
Dynamics and evolution of the deep mantle resulting from thermal, chemical, phase and melting effects (2012, background): “A recently-proposed mechanism for generating deep, dense material over time is the crystallisation of a “basal magma ocean” (BMO) (Labrosse et al., 2007).”
Magma oceans in the inner solar system (2012, background): “At still higher pressures, majorite may have a density crossover with coexisting liquids (Ohtani & Maeda 2001, Stixrude & Karki 2005, Mosenfelder et al. 2007), leading to a basal magma ocean (Labrosse et al. 2007).”
Stratification of the top of the core due to chemical interactions with the mantle (2010, background): “Chemical diffusion through the crystalline mantle limits the reaction zone to narrow layers, although transport could be enhanced if the base of the mantle is partially molten [ Labrosse et al. 2007].”
Evidence for multiple magma ocean outgassing and atmospheric loss episodes from mantle noble gases (2013, background): “LLSVPs are often associated with crystal fractionation from a basal magma ocean (e.g., Coltice et al., 2011; Labrosse et al., 2007) and Coltice et al.”
The primitive nature of large low shear-wave velocity provinces (2012, background): “A possible hypothesis is that LLVSP result from the partial differentiation of the mantle early in the Earth’s history (Solomatov and Stevenson, 1993; Labrosse et al., 2007; Lee et al., 2010), and subsequent interaction with mantle convection.”
Solidus and liquidus profiles of chondritic mantle: Implication for melting of the Earth across its history (2011, methodology): “, 2004), leading to chemical segregation of the mantle; (ii) relics of descending slabs rich in mid-ocean ridge basalts (MORB); (iii) zones enriched in incompatible elements associated to the progressive crystallization of an ancient magma ocean and trapped in the lowermost mantle (Labrosse et al., ”
The MgSiO3 system at high pressure: Thermodynamic properties of perovskite, postperovskite, and melt from global inversion of shock and static compression data (2009, methodology): “A basal melt layer at the CMB could also be the remnant of a more extensive magma ocean formed early in Earth’s history, with attendant implications for the evolution of geochemical reservoirs in the planet [Labrosse et al., 2007].”
A reference Earth model for the heat‐producing elements and associated geoneutrino flux (2013, background): “…compositions of thermochemical piles in the mantle [ Š rámek et al ., 2013], the characteristics of a residual layer from a basal magma ocean [ Labrosse et al ., 2007; Lee et al ., 2010], and/or the presence of an early Earth-enriched reservoir that was sequestered at the core-mantle boundary…”
Mantle dynamics in super-Earths: Post-perovskite rheology and self-regulation of viscosity (2012, background): “548 549 It has been proposed that at early times Earth’s mantle had both a shallow magma ocean and a 550 deep, basal magma ocean (BMO) (Labrosse et al., 2007).”
Very low sound velocities in iron‐rich (Mg,Fe)O: Implications for the core‐mantle boundary region (2010, background): “of a fractional crystallization of primordial magma ocean [Labrosse et al., 2007].”
Geophysics of Chemical Heterogeneity in the Mantle (2012, background): “For example, melting processes in the early Earth may have led to deep melt segregation that has survived for long periods of time (Boyet & Carlson 2005, Labrosse et al. 2007, Lee et al. 2010).”
Melting and mixing states of the Earth’s mantle after the Moon-forming impact (2015, background): “…be noted that the chemical heterogeneity could take many forms, including a non-uniformity of noble gas mole fraction (e.g., Mukhopadhyay, 2012) or a discrete layer of denser mantle material at the base of the mantle because of the formation of a basal magma ocean (e.g., Labrosse et al., 2007).”
Thermal evolution of an early magma ocean in interaction with the atmosphere (2012, neutral): “Recent experimental petrological data at high pressure and temperature [ Fiquet et al. , 2010; Labrosse et al. , 2007; Nomura et al. , 2011] show that the liquidus and solidus proﬁles in the very deep mantle could be different from those shown in Figure 1 and allow for the long-term existence of a…”
Energetics of the Core (2015, background): “Such melts, which are probably dense (Mosenfelder et al. 2007), could strongly affect the thermal evolution of the core and perhaps delay the onset of dynamo activity (Labrosse et al. 2007).”
Thermodynamics of silicate liquids in the deep Earth (Invited) (2009, background): “The existence of a basal liquid layer may have important implications for the generation and preservation of ancient mantle geochemical signatures, and for the origin of ultra-low velocity zones and large scale thermochemical anomalies in the lower mantle (Boyet and Carlson, 2005; Labrosse et al., 2”