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Center for Isotope Cosmochemistry and Geochronology

The Center for Isotope Cosmochemistry and Geochronology (CICG) led by Justin Simon is based in the Astromaterials Research and Exploration Directorate (ARES) at NASA Johnson Space Center. Our team measures a wide variety of elements and their isotopes to understand the origin of our Solar System, the processes that transformed nebular dust and gas into the building blocks of planets, and planet formation (accretion & differentiation). Investigations include the measurement of: (1) Short- and long-lived radionuclides for chronology studies, (2) Fractionation of middle mass stable isotopes to study the formation mechanisms of these planetary materials, and (3) Isotopic analyses that utilize the traditional ways that isotopic compositions can be used to study interaction among different reservoirs within the protoplanetary disk and terrestrial planets. We strive to integrate all of these isotopic measurements into a petrological context.



Previous Members

2014 CICG Researchers
Simon Research Group
Ryan Mills
Tim Peters
Larry Nyquist
Kent Ross
Justin Simon
Mike Tappa
Chi-Yu Shih
2013 CICG Researchers
Simon Research Group
Chi-Yu Shih
Ryan Mills
Larry Nyquist
Mike Tappa
Kent Ross
Justin Simon
Previous Researchers
Tomohiro Usui - former postdoctoral researcher, now Assistant Professor at Tokyo Tech
Ryan Mills - former postdoctoral researcher, now at the University of North Carolina
Tim Peters - former postdoctoral researcher, now at the Lunar Planetary Institute
Summer Interns
2012 Peter Christoffersen, starting graduate school at University of Western Ontario
2013 Poorna Srinivasan, now a graduate student at University of New Mexico
2014 Alastair Tait, now a graduate student at Monash University
2014 Kent Fisher (NASA Co-op), now a graduate student at University of Houston
2015 Kaitlyn McCain, starting graduate school at University California, Los Angeles