The Fate of Sulfur and Chalcophile Elements During Crystallization of the Lunar Magma Ocean

摘要: To assess the viability of sulfide liquid saturation during crystallization lunar magma ocean (LMO), we present a new data set describing both sulfur (S) concentration at (SCSS) and liquid-silicate melt partition coefficients many trace elements for various differentiated magmas lunar-relevant conditions. Using these parameterizations, model SCSS distribution most chalcophile with progressive LMO in absence presence liquids. Modeling results different modes show that proposed mantle S abundances FeS is expected to occur between 96% 98% crystallization. This decreased >91% Fe-S liquids 30% Ni or Cu. Saturation S-poor can >75% The timing depends strongly on assumed content following formation core composition. Modeled indicate sulfide-liquid late-stage would yield much lower Cu than observed KREEP basalts estimated urKREEP reservoir, as well Ni/Co latter. Sulfide therefore did not affect moderately siderophile element fractionation within LMO, supporting hypothesis nonvolatile, reflect phase and/or addition meteoritic late veneer.