Fig. 3: Lunar igneous rocks in the olivine–anorthite–quartz pseudoternary system projected from diopside.
From: Crustal remelting origin of highly silicic magmatism on the Moon
Pentagrams represent average bulk compositions of lunar igneous rocks (FANs rocks, purple; Mg-suite rocks, dark blue; Alkali-suite rocks, green; KREEP basalts, red; Low-Ti basalts, bronze; High-Ti basalts, orange) used in phase equilibrium modeling (Fig. 2). The frequency distributions of high-Ti and low-Ti basalts are shown based on kernel density estimation in the top plot and as probability curves in the bottom plot. The anorthite–enstatite join (dashed line) represents the thermal divide between silica-deficient and silica-excess rocks. Wo wollastonite, En enstatite, Di diopside, An anorthite, Ol olivine, Sill sillimanite.
