Fig. 5: Petrogenetic model for troctolite 76535 involving reactive melt transport.
From: Chemical heterogeneities reveal early rapid cooling of Apollo Troctolite 76535
a Mg-rich lower mantle interacts with a warm anorthitic crust, and ur-KREEP, mechanically mixing the three components. b Partial melting occurs; the liquid infiltrates the surrounding rock and accumulates in lenses (cm–m scale). c Microscopic views of rapid initial crystallization followed by dissolution and crystallization of plagioclase (gray), olivine (green), and orthopyroxene (dark green) during rapid cooling. As the magma temperature approaches the temperature of the surroundings, the cooling rate slows. Grains anneal during protracted subsolidus cooling.
