Nickel-iron in lunar anorthosites

Meteoritic material on the moon

“…5) exceed equilibrium solubilities in silicates by several orders of magnitude. The extraneous nature of these siderophiles is shown by the fact that they reside largely in discrete metal grains (Wlotzka et al, 1972;, which comprise 0.1-1% of highland breccias and impact melts (Dickey, 1970;Vinogradov, 1972). A suspension of metal droplets in a silicate melt is dynamically unstable on time scales comparable to the freezing time of basaltic flows (Fish et al, 1960;Provost and Bottinga, 1972).…”