Apollo 12 Sample Experimental Investigation


Apollo 12 sample 12032,366-18 is a basaltic rock fragment with KREEP components (enrichment in K, REE, P, and other incompatible elements) and a mesostasis region that may have formed in part as a result of silicate-liquid immiscibility (SLI). We sought to confirm SLI in 12032,366-18 through a series of crystallization experiments designed to reproduce the liquid line of decent for the bulk composition of 12032,366-18.

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Youngest Mare Basalts on the Moon


Using crater size-frequency distributions (CSFDs) and careful discrimination of primary and secondary impact craters in the mare region south of Aristarchus Crater, we reexamined the age of unit ‘P60’, determined previously by Hiesinger et al. (2003) to be one of the youngest basaltic surfaces on the Moon. Owing to the apparently young age of these basalts, this region is a potential site for future sample return missions.

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Lunar impact melt characterization


I am investigating lunar impact melts, which are important for understanding the complexity of the impact cratering process and the history of planetary surfaces. Two of the fundamental problems associated with impact cratering involve the processes of impact melt emplacement and clast entrainment. Both processes are important for understanding the sequence of events during a hypervelocity impact, and how thermal conditions can affect entrained materials.