Justin Simon
Planetary Scientist, Isotope Cosmochemistry & Geochemistry | NASA
Justin Simon
Planetary Scientist, Isotope Cosmochemistry & Geochemistry
NASA
Phone
281.244.6408
Phone
281.244.6408
Biography
Justin Simon is a planetary scientist within the Astromaterials Research and Exploration Science (ARES) Division at the Johnson Space Center. Before coming to Johnson, he worked at the University of California at Berkeley and the Berkeley Geochronology Center as a Postdoctoral Fellow. Currently, Simon is the lead for the Center for Isotope Cosmochemistry and Geochronology (CICG) based within the ARES division. His research group conducts laboratory measurements on meteorites and samples returned by spacecraft to address rocky planet formation, such as from the solar system's earliest solids to the crusts of habitable planets.
Education
Ph.D.
Geology
University of California, Los Angeles
2005
M.Sc.
Geochemistry
Colorado School of Mines
2000
B.A.
Geology
Macalester College
1996
| Postdoc Research Fellow | University of California, Berkeley | 2005-2009 |
| Advanced Volcanological Field Studies | University of New Mexico | 2000 |
| Summer Field Studies | Indiana University | 1996 |
Education
Ph.D., Geology, 2005
University of California, Los Angeles
M.Sc., Geochemistry, 2000
Colorado School of Mines
B.A., Geology, 1996
Macalester College
Postdoc Research Fellow, 2005-2009
University of California, Berkeley
Advanced Volcanological Field Studies, 2000
University of New Mexico
Summer Field Studies, 1996
Indiana University
Laboratories
Select Publications
Gorce*, J.S., Mittlefehldt, D.W., Simon, J.I. (2022) Localized equilibrium and mineralogic effects on trace element distribution and mobility in highly metamorphosed eucrite Elephant Moraine (EET) 90020, Geochimica et Cosmochimica Acta 335, 256-271.
Simon, J.I., Christoffersen, Wang, J., Mouser*, M.D., Mills, R.D., Ross, D.K., Rahman, Z. (2020) Volatiles in lunar felsite clasts: Impact-related delivery of hydrous material to an ancient dry lunar crust, Geochimica et Cosmochimica Acta 276, 299-326.
Simon, J.I., Ross, D.K., Nguyen, A.N., Simon, S.B., Messenger, S. (2019) Molecular cloud origin for oxygen isotopic heterogeneity recorded by a primordial spinel-rich refractory inclusion, The Astrophysical Journal Letters 884, L29
Mills*, R.D., Simon, J.I., and DePaolo, D.J. (2018) Calcium isotopes of silicic igneous rocks, EPSL 495, 242-250.
Simon, J.I., Cuzzi, J.N., McCain*, K., Christoffersen*, P., Srinivasan*, P, Fisher*, K., Tait*, A.W., Olson, J.N., and J. Scargle (2018) Particle size distribution in chondritic meteorites: Evidence for pre-planetesimal histories, EPSL 494, 69-82.
Mark, D.F., Renne, P.R., Dymock, R., Smith, V.C., Simon, J.I., Morgan, L, Richard, A.S., and B.S. Ellis (2017) High precision 40Ar/39Ar dating of Pleistocene tuffs and temporal anchoring of the Matuyama-Brunhes boundary, Quaternary Geochronology 39, 1-23.
Simon, J.I., Jordan*, M.K., Tappa, M.J., Schauble, E.A., Kohl, I.E., and E.D. Young (2017) Calcium and titanium isotope fractionation in refractory inclusions: tracers of condensation and inheritance in the early solar protoplanetary disk, EPSL 472, 277-288.
Moore, W.B., Simon, J.I., and A.A.G. Webb (2017) Heat-pipe planets, EPSL 474, 13-19.
Mills*, R., Simon, J. I., Alexander, C. M. O'D., Wang, J. and E. H. Hauri (2017) Water in alkali feldspar: the effect of rhyolite generation on the lunar hydrogen budget, Geochemical Perspectives Letters, 3, 115-123.
Tait*, A.W., Fisher*, K.R., Srinivasan*, P., and J. I. Simon (2016) Evidence for impact induced pressure gradients on the Allende CV3 parent body: Consequences for fluid and volatile transport, EPSL, 454, 213-224.
Peters*, T.J., Simon, J.I., J. H. Jones, T. Usui*, R. Moriwaki, R. C. Economos, A. K. Schmitt, and K. D. McKeegan (2015) Tracking the martian mantle signature in olivine-host melt inclusions of basaltic shergottites Yamato 980459 and Tissint, EPSL, 418, 91-102.
Usui*, T., Alexander, C., Wang, J., Simon, J. I., J. Jones (2015) A moderate D/H ratio for a surficial water reservoir on Mars, EPSL, 410, 140-151.
Simon, J.I., Hutcheon, I.D. Simon, S.B., Matzel, J.E.P., Ramon, E.C., Weber, P.K., Grossman, L. and D.J. DePaolo (2011) Oxygen isotope variations at the margin of a CAI records circulation within the solar nebula, Science 331, 1175-1178.
*student and postdoc author