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David S. Draper, Manager Astromaterials Research (KR)

William L. Stefanov
Area of Research/Engineering

Petrology and Geochemistry

Contact Information

NASA Employee / KR


Research/Engineering Interests

Igneous petrology, with emphasis on experimental investigations of processes of formation of terrestrial and extraterrestrial basaltic magmas. Areas of major concentration include experimental constraints on formation of martian and lunar primitive basalts and systematics of crystal-liquid trace element partitioning.

Education / Experience

Ph.D. University of Oregon, Eugene, 1991

B. Sc. Humboldt State University, Arcata CA, 1985

Laboratory / Research Group

1-bar and High Pressure Experimental Petrology


Elardo S. M., Draper D. S., and Shearer C. K. Jr. (2011) Lunar magma ocean crystallization revisited: Bulk composition, early cumulate mineralogy, and the source regions of the highlands Mg-suite. Geochimica et Cosmochimica Acta 75:3024-3045.

Chabot N. L., McDonough W. F., Jones J. H., Saslow S. A., Ash R. D., Draper D. S., and Agee C. B. (in press 2011) Partitioning behavior at 9 GPa in the Fe-S System. Earth and Planetary Science Letters

Draper D. S., van Westrenen W. (2007) Quantifying garnet-melt trace element partitioning using lattice-strain theory: Assessment of significant controls and a new predictive model. Contributions to Mineralogy and Petrology 154:731-746.

van Westrenen W., Draper D. S. (2007) Quantifying garnet-melt trace element partitioning using lattice-strain theory: New crystal-chemical and thermodynamic constraints. Contributions to Mineralogy and Petrology 154:717-730.

Draper D. S., du Frane, S. A., Dwarzski, R. E., Shearer, C. K. Jr.,Agee, C. B. (2006) High-pressure phase equilibria and element partitioning experiments on Apollo 15 green C picritic glass: Implications for the role of garnet in the deep lunar interior. Geochimica et Cosmochimica Acta 70:2400-2416.