Fig. 1. Plot of Sc versus Sm concentrations for lunar impactites.
Compositional fields are from (51). The Apollo 16 impactites studied here are shown relative to the full range of Apollo 16 impact melt rocks and breccias. The feldspathic breccia meteorites studied here plot outside the Apollo 16 compositional fields, suggesting that they sampled distinct target lithologies and are, therefore, from a different location on the Moon that is chemically similar to those sampled by some Apollo 15 and Apollo 11/Luna 20 impactites. Scandium and Sm data were not available for NWA 11228, so the range of Sc and Sm concentrations from meteorites that are likely paired with NWA 11228 (NWA 8673, 8746, 10065, and 11193) were used to represent NWA 11228 (70). Data references are in table S1.