Do Olivine Crystallization Temperatures Faithfully Record Mantle Temperature Variability?
Geochemistry, Geophysics, Geosystems, 2021 Crystallization temperatures of primitive olivine crystals have been widely used as both a proxy for, or an intermediate step in calculating, mantle temperatures. The olivine‐spinel aluminum‐exchange thermometer has been applied to samples from mid‐ocean
Simon Matthews +4 more
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Shock-induced melting of MgSiO_3 perovskite and implications for melts in Earth's lowermost mantle [PDF]
, 2004 New shock wave equation of state (EOS) data for enstatite and MgSiO_3 glass constrain the density change upon melting of Mg-silicate perovskite up to 200 GPa. The melt becomes denser than perovskite near the base of Earth's lower mantle.
Ahrens, Thomas J. +3 more
core
The Significance of Multiple Saturation Points in the Context of Polybaric Near-fractional Melting [PDF]
, 2004 Experimental petrologists have successfully located basaltic liquid compositions parental to mid-ocean ridge basalt that are, within experimental resolution, multiply saturated with three-phase harzburgite or four-phase lherzolite assemblages on their ...
Asimow, Paul D., Longhi, John
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Experimental Observation of a Calcium Silicon Double Carbonate
Angewandte Chemie International Edition, EarlyView.High‐pressure and ‐temperature reactions between Ca5(Si2O7)(CO3)2 tilleyite and CO2 carbon dioxide yield the first experimental evidence of the double carbonate Ca2Si(CO3)4 and a new Ca2(C4O10) phase containing tetrahedral [CO4] units. These findings reveal unexpected carbonate chemistry and highlight pathways for carbon incorporation under mantle ...
Benedito Donizeti Botan‐Neto +6 more
wiley +1 more source
Depth-dependent peridotite-melt interaction and the origin of variable silica in the cratonic mantle
Nature Communications, 2021 The compositional variability amongst Archaean cratonic peridotites has long been recognized, however its origin remains debated. The authors here find that the collapse of the dual Archaean mantle melting environment ceased production of silica-enriched
Emma L. Tomlinson, Balz S. Kamber
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Formation and evolution of a metasomatized lithospheric root at the motionless Antarctic plate: the case of East Island, Crozet Archipelago (Indian Ocean) [PDF]
, 2016 Sitting atop the nearly stagnant Antarctic plate (ca. 6.46 mm/yr), the Crozet archipelago midway between Madagascar and Antarctica constitutes a region of unusually shallow (1543-1756 m below sea level) and thickened oceanic crust (10-16.5 km), high ...
Bellieni, Giuliano +3 more
core
The energetics of melting fertile heterogeneities within the depleted mantle [PDF]
To explore the consequences of mantle heterogeneity for primary melt production, we develop a mathematical model of energy conservation for an upwelling, melting body of recycled oceanic crust embedded in the depleted upper mantle.
Katz, R. F., Rudge, John F.
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Exoplanet interiors and habitability [PDF]
, 2019 More than 1000 exoplanets with a radius smaller than twice that of the Earth are currently known, mainly thanks to space missions dedicated to the search of exoplanets.
Hoolst, Tim Van +2 more
core +1 more source
Effective pretreatment of wet microalgal biomass to enhance lipid extraction in biodiesel production
Biofuels, Bioproducts and Biorefining, EarlyView.Abstract Biodiesel is a viable alternative to fossil fuels. Identifying and evaluating nonedible sources is essential to address ecological concerns and meet energy demands. Microalgae are effective for lipid production but their rigid cell walls hinder bioproduct release making the process energy‐intensive and costly.
Amarnath Krishnamoorthy +2 more
wiley +1 more source
Global-scale modelling of melting and isotopic evolution of Earth's mantle: melting modules for TERRA [PDF]
Geoscientific Model Development, 2016 Many outstanding problems in solid-Earth science relate to the geodynamical explanation of geochemical observations. Currently, extensive geochemical databases of surface observations exist, but satisfying explanations of underlying mantle processes are ...
H. J. van Heck +3 more
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