The system Anorthite-Forsterite-Fayalite-Silica to 2 kbar with lunar petrologic applications

Abstract

Near-liquidus phase relations in the magnesium-rich portion of the system Anorthite-Forsterite-Fayalite-Silica have been determined from synthesis experiments at 1 atm and 2 kbar at oxygen fugacities near the iron-wustite buffer. The major-element chemistries of KREEP basalts are similar to peritectic liquids, L[ol, px, an], produced experimentally.