Geophysical Laboratory, Carnegie Institution for Science
5251 Broad Branch Rd., N.W., Washington, D.C. 20015
University of California Los Angeles, Los Angeles, CA
Ph.D. in Geochemistry, 2008.
Thesis: Non-Traditional Stable Isotope Fractionation Mechanisms: From Dust to Planets
Cornell University, Ithaca, NY
Master of Engineering in Geological Sciences, 2003.
Cornell University, Ithaca, NY
Bachelor of Science in Geological Engineering, 2002.
Geophysical Laboratory, Carnegie Institution for Science, Washington DC
Summer 2009 – Present. Staff Scientist.
University of Maryland, Department of Geology, Maryland
Winter 2012 – Present. Adjunct Assistant Professor.
Institut de Physique du Globe de Paris, France
2018-2021. Visiting Professor
CIDER Summer Program, Santa Barbara, California
Summer 2014, 2016. Invited Lecturer and Senior Participant.
Stanford University, School of Earth Sciences, Palo Alto, CA
December 2012 – April 2013. Visiting Professor.
Geophysical Laboratory, Carnegie Institution of Washington, Washington DC
Fall 2008 – Spring 2009. Postdoctoral Fellow.
Department of Earth and Space Sciences, UCLA, California
Winter 2004 – 2008. Graduate Research Assistant.
CIDER Summer Program, Santa Barbara, California
Summer 2004. Student.
Geophysical Laboratory, Carnegie Institution of Washington, Washington D.C.
Summer 2002. Intern.
Reginald Daly Lecture, American Geophysical Union, 2021
Fellow, Mineralogical Society of America, 2016
MSA Award, Mineralogical Society of America, 2016
F.W. Clarke Medalist, Geochemical Society, 2015
Blaustein Fellowship, Stanford University, 2012
Carnegie Postdoctoral Fellowship, Carnegie Institution of Washington, 2008
Nininger Award, Arizona State University, 2007
Dissertation Year Fellowship, UCLA, 2007
Goldschmidt Travel Grant for Travel to Germany, Geochemical Society, 2007
Chair’s Fund to attend Gordon Research Conference, NASA, 2007
Outstanding Student Presentation Award, VGP section of AGU, 2006
Excellence in Teaching Award, UCLA, 2005 and 2006
Goldschmidt Travel Grant for Travel to Australia, NSF and GS, 2006
Cross-Training Fellowship, UCLA, 2005
Raisler’s M. Eng. Fellowship, Cornell University, 2003
Henry G. White Scholarship, Cornell University, 2002
Mineralogical Society of America Undergraduate Award, 2002
*Student and postdoctoral advisees italicized
Sossi, P. and A. Shahar (2021) Ironing Out Isotopic Differences Among Rocky Bodies, Elements, 17, 407-412.
Nie, N., X.Y. Chen, T. Hopp, J.Y. Hu, Z.J. Zhang, F.Z. Teng, A. Shahar, N. Dauphas (2021) Imprint of Chondrule Formation on the K and Rb Isotopic Compositions of Carbonaceous Meteorites, Science Advances, vol. 7, no. 49, abl3929.
Nie, N., N. Dauphas, E.E Alp, H. Zeng, C.K. Sio, J.Y. Hu, S.M. Aarons, Z. Zhang, H. Tian, K.B. Prissel, J. Greer, W. Bi, M.Y. Hu, J. Zhao, A. Shahar, M. Roskosz, F. Teng, M.J. Krawczynski, P.R. Heck, F.S. Spear (2021) Iron, magnesium, and titanium isotopic fractionations between garnet, ilmenite, fayalite, biotite, and tourmaline: results from NRIXS, ab initio, and study of mineral separates from the Moosilauke metapelite, Geochimica et Cosmochimica Acta, 302, 18-45.
Smith, E.M., P. Ni, S.B. Shirey, S.H. Richardson, and A. Shahar (2021) Heavy iron in large gem diamonds traces deep subduction of serpentinized ocean floor, Science Advances, vol. 7, no. 14, eabe9773.
Ni, P., C. A. Macris, E. A. Darling, and A. Shahar (2021) Evaporation induced Cu isotope fractionation: Insights from vaporization experiments, Geochimica et Cosmochimica Acta, 298, 131-148.
Shahar, A. and E. D. Young (2020) An Assessment of Iron Isotope Fractionation during Core Formation, Chemical Geology, 554, 119800.
Ni, P., N. L. Chabot, C. J. Ryan, and A. Shahar (2020) Heavy Iron Isotopes for Iron Meteorites caused by Core Crystallization, Nature Geoscience, 13, 382-386 (and the cover).
Steenstra, E.S., J. Berndt, S. Klemme, W. van Westrenen, E.S. Bullock, and A. Shahar (2020) Addressing matrix effects for 193 nm excimer LA-ICP-MS analyses of Fe-rich sulfides and a new predictive model, Journal of Analytical Atomic Spectrometry, 35, 498-509.
Helffrich, G., R. Brasser, and A. Shahar (2019) The chemical case for Mercury mantle stripping, Progress in Earth and Planetary Science, 6:66.
Shahar, A., P. Driscoll, A. Weinberger, and G. Cody (2019) What makes a planet habitable? Science, 364, 434-435.
Elardo, S.M., A. Shahar, T.D. Mock and C.K. Sio (2019) The Effect of Core Composition on Iron Isotope Fractionation between Planetary Cores and Mantles, Earth and Planetary Science Letters, 513, 124-134.
Young, E.D., A. Shahar, F. Nimmo, H.E. Schlichting, E.A. Schauble, H. Tang, and J. Labidi (2019) Near-equilibrium isotope fractionation during planetesimal evaporation, Icarus, 323, 1-15.
Peters, B., A. Shahar, R.W. Carlson, J.M. Day and T.D. Mock (2019) A sulfide perspective on iron isotope fractionation during ocean island basalt petrogenesis, Geochimica et Cosmochimica Acta, 245, 59-78.
Sio, C.K., M. Roskosz, N. Dauphas, N.R. Bennett, T.D. Mock and A. Shahar (2018) The isotope effect for Mg-Fe interdiffusion in olivine and its dependence on crystal orientation, composition and temperature, Geochimica et Cosmochimica Acta, 239, 463-480.
Shahar, A. (2018) Silicon isotopes, in Encyclopedia of Geochemistry, W. M. White, ed., pp. 1337-1339, Springer, Cham, Switzerland, 2018.
Hellfrich, G., A. Shahar and K. Hirose (2018) Isotopic signature of core-derived SiO2, American Mineralogist, 103, 1161-1164.
Elardo, S.M. and A. Shahar (2017) Non-Chondritic Iron Isotope Ratios in Planetary Mantles as a Result of Core Formation, Nature Geoscience, 10, 317-321, (and the cover).
Shahar, A., P. Savage and F. Moynier (2017) Stable Isotope Evidence for the Differentiation of Planetesimals, Chapter 12 in Planetesimals, Edited by L.T. Elkins-Tanton and B.P. Weiss Cambridge University Press.
Shahar, A., S. M. Elardo and C. A. Macris (2017) Equilibrium Fractionation of Non-Traditional Stable Isotopes: An Experimental Approach, Reviews in Mineralogy and Geochemistry, 82, 65-84.
Fei, Y., C. Murphy, Y. Shibazaki, A. Shahar and H. Huang (2016) Thermal equation of stat of hcp-iron: Constraint on the density deficit of Earth’s solid inner core, Geophysical Research Letters, 43, doi:10.1002/2016GL069456.
Shahar, A., E. A. Schauble, R. Caracas, A. E. Gleason, M. M. Reagan, Y. Xiao, J. Shu and W. Mao (2016) Pressure-dependent Isotopic Composition of Iron Alloys, Science, 352, 580-582.
Labidi, J., A. Shahar, C. Le Losq, V. J. Hillgren, B. O. Mysen, Y. Fei and J. Farquhar (2016) Experimentally Determined Sulfur Isotope Fractionation between Metal and Silicate and Implications for Planetary Differentiation, Geochimica et Cosmochimica Acta, 175, 181-194.
Liu, X. M., L. C. Kah, A. H. Knoll, H. Cui, A. J. Kaufman, A. Shahar, and R. M. Hazen, (2015) Tracing Earth’s O2 evolution using Zn/Fe ratios in marine carbonates, Geochemical Perspectives Letters, 2(0), 24–34.
Georg, R. B. and A. Shahar (2015) The accretion and differentiation of Earth under oxidizing conditions, American Mineralogist 100, 2739-2748.
Siebert, J. and A. Shahar (2015) An experimental geochemistry perspective on Earth’s core formation, in The Early Earth, AGU Monograph, Edited by J. Badro and M. J. Walter.
Young, E.D., C.E. Manning, E.A. Schauble, A. Shahar and C.A. Macris (2015) High- Temperature Equilibrium Fractionation of Non-Traditional, Stable Isotopes: Experiments, Theory and Applications, Chemical Geology 395, 176-195.
Shahar, A., J. Mesa-Garcia, L.A. Kaufman, V. J. Hillgren, M.F. Horan, and T.D. Mock (2015) Sulfur-controlled iron isotope fractionation experiments of core formation in planetary bodies, Geochimica et Cosmochimica Acta, 150, 253-264.
Wood, B., J. Li, and A. Shahar (2013) Carbon in the core: its influence on the properties of core and mantle, Reviews in Mineralogy and Geochemistry, 75, 231-250.
Deng, L., C. Seagle, Y. Fei, and A. Shahar (2013) High pressure and temperature electrical resistivity of iron and implications for planetary cores, Geophysical Research Letters, 40, 33-37.
Deng, L., Y. Fei, X. Liu, Z. Gong, and A. Shahar (2013) Effect of carbon, sulfur and silicon on iron melting at high pressure: Implications for composition and evolution of the planetary terrestrial cores, Geochimica et Cosmochimica Acta, 114, 220-233.
Kavner, A., M. B. Weinberger, A. Shahar, R.W. Cumberland, J.B. Levine, R. B. Kaner and S.H. Tolbert (2012) Lattice strain of osmium diboride under high pressure and nonhydrostatic stress, Journal of Applied Physics, 112, 013526-013526-7.
Shahar, A., V. J. Hillgren, E. D. Young, Y. Fei, C. A. Macris, and L. Deng (2011) High-Temperature Si isotope fractionation between iron metal and silicate, Geochimica et Cosmochimica Acta, 75, 7688-7697.
Rumble, D., E. D. Young, A. Shahar, and W. Guo (2011) Stable Isotope Cosmochemistry and the Evolution of Planetary Systems, Elements, 7, 23-28.
Shahar, A., K. Ziegler, E. D. Young, A. Ricolleau, E. A. Schauble, and Y. Fei (2009) Experimentally determined Si isotope fractionation between silicate and metal and implications for Earth’s core formation, EPSL, 288, 228-234.
Kavner, A., A. Shahar, J. Black, and E. D. Young (2009) Iron Isotope Electroplating: Diffusion-Limited Fractionation, Chemical Geology, 267, 131-138.
Hill, P. S., E. A. Schauble, A. Shahar, E. Tonui, and E. D. Young (2009) Experimental Studies of Equilibrium Iron Isotope Fractionation in Ferric Aquo-Chloro Complexes, Geochimica et Cosmochimica Acta, 73, 2366-2381.
Shahar, A., E. D. Young, and C. E. Manning (2008) Equilibrium high-temperature Fe isotope fractionation between Fayalite and Magnetite: an experimental approach, Earth and Planetary Science Letters, 268, 330-338.
Shahar, A. and E. D. Young (2007) Astrophysics of CAI formation as revealed by silicon isotope LA-MC-ICPMS of an igneous CAI, Earth and Planetary Science Letters, 257, 497-510.
Gounelle, M., E. D. Young, A. Shahar, E. Tonui, and A. Kearsley (2007) Magnesium isotopic constraints on the origin of CBb chondrites, Earth and Planetary Science Letters, 256, 521-533.
Van Acker, M., A. Shahar, E. D. Young, and M. Coleman (2006) GC/Multiple Collector-ICPMS Method for Chlorine Stable Isotope Analysis of Chlorinated Aliphatic Hydrocarbons, Analytical Chemistry, 78, 4663-4667.
Shahar, A., W. A. Bassett, H. K. Mao, I. M. Chou, and W. Mao (2005) The stability and Raman spectra of ikaite, CaCO3∙6H2O, at high pressure and temperature, American Mineralogist, 90, 1835-1839.
Kavner, A., F. Bonet, A. Shahar, J. Simon, and E. Young (2005) The isotope effects of electron transfer: An explanation of Fe isotope fractionation in nature, Geochimica et Cosmochimica Acta 69, 2971-2979.
"AEThER: Atmoshperic Empirical, Theoretical, and Experimental Research," PI, Sloan Foundation, 2021-2024.
"The Fate of Earth's Plates: Sublithopsheric Diamond Constraints on Recycling in Earth’s Mantle Transition Zone," Co-PI, NSF-EAR (Geochemistry and Petrology), 2020-2023.
"Collaborative Research: Investigating Iron Isotope Fractionation during Partial Melting," PI, NSF-EAR (Geochemistry and Petrology), 2019-2022.
“Determination of Equilibrium Iron Isotope Fractionation Factors at High Pressure,” PI – Collaborative Proposal with Wendy Mao NSF-CSEDI, 2015-2019.
“Acquisition of a Field Emission Electron Microprobe for Geological Analysis,” Co-PI, NSF IF, 2014-2015.
“Unraveling the Temperature of Pallasite Formation: Insights from Fe Isotopes,” PI, NASA-Cosmochemistry, 2013-2017.
“Exploring the Effects of Light Elements on the Iron Isotope Fractionation between Metal and Silicate,” P.I., NSF-EAR (Geochemistry and Petrology), 2013-2017.
“Si and Fe Isotope Geochemistry at High Pressure and Temperature,” PI, NSF-EAR (Geochemistry and Petrology), 2010-2013.
University College London, Chemical and Physical Society, November 2022
Goldschmidt, Keynote, July 2022
Lunar and Planetary Institute, April 2022
Northwestern University, Department of Earth and Planetary Sciences, February 2022
Ruhr-Universität Bochum, Institut für Geologie, Mineralogie und Geophysik, January 2022
Institut de Physique du Globe de Paris, October 2021
Goldschmidt, Keynote, July 2021
National Capitol Astronomers, November 2020
Australian National University, Virtual Seminar, May 2020
University of North Carolina Chapel Hill, Department of Geological Sciences, February 2020
American Geophysical Union Fall Meeting Centennial, Keynote, December 2019
Goldschmidt, Keynote: Non-Traditional Stable Isotope Fractionation at High Temperatures, August 2019
COMPRES Annual Meeting, Workshop on NRIXS, August 2019
Institut de Physique du Globe de Paris, May 2019
AAS-AGU Joint Symposium on Exoplanets, January 2019
Geological Society of America Annual Meeting, November 2018
APS NRIXS Workshop, November 2018
Yale University, Department of Geology and Geophysics, October 2018
COMPRES Annual Meeting, Keynote, August 2018
Asia Oceania Geosciences Society Meeting, From Dust to Planets, June 2018
Stanford University, GES Department Seminar, April 2018
University of Alberta, Earth and Atmospheric Sciences Dept, Grace Anne Stewart Series, February 2018
University of British Columbia, Department of Earth, Ocean and Atmospheric Sciences, February 2018
University of Minnesota, Earth Science Department Seminar, October 2017
University of Maryland, Geochemistry Seminar, September 2017
Earth Life Science Institute (ELSI) Seminar Series, August 2017
MIT, Dept. of Earth, Atmospheric and Planetary Sciences Lecture Series, April 2017
Kaplan Workshop, The Hebrew University of Jerusalem, Israel, February 2017
Harvard University, Department of Earth and Planetary Science Colloquium, February 2017
Princeton University, Department of Geosciences Seminar, October 2016
University of California Los Angeles, Dept. of Earth, Planetary and Space Sciences Colloquium, April 2016
Carnegie Observatories Public Lecture Series, April 2016
American Geophysical Union Fall Meeting, Chemical and Dynamical Constraints on the Formation and Evolution of the Terrestrial Planets, December 2015
Deep Carbon Observatory International Meeting, March 2015
Geological Society of America, Frontiers in Non-Traditional Stable Isotopes, October 2014
Goldschmidt Conference, Keynote: Stable Isotope Fractionation in the Deep Earth, June 2014
University of Maryland, Dept. of Geology Seminar, April 2014
University of Amsterdam, Earth Science Department, November 2013
Stanford University, GES Department Seminar, January 2013
Washington University, EPS Colloquium, February 2012
Penn State University, Geosciences Colloquium, April 2011
University of California Berkeley, Dept. of Earth and Planetary Science Seminar, March 2011.
Smithsonian Institution, Museum of Natural History, February 2011
American Geophysical Union Fall Meeting, invited talk in: Physical State of Planetary Cores, December 2010
Geological Society of Washington, October 2010
University of Maryland, Dept. of Geology Seminar, September 2009
Indiana University, Dept. of Geological Sciences Seminar, February 2009
Goldschmidt, invited talk in: Partitioning among melts, metals and minerals in planetary systems, July 2008
Carnegie Institution of Washington, Geophysical Laboratory Seminar, July 2008
Princeton University, Dept. of Geosciences Seminar, April 2008
Carnegie Institution of Washington, Geophysical Laboratory Seminar, February 2008
Non-Traditional Stable Isotope Geochemistry, University of Maryland, Fall 2012
Oxidation State of the Mantle, Stanford University, Winter 2013
Facilitator for Signatures of Life in the Universe Scialog, Summer 2021
Neil Foley (Undergraduate intern, Summer 2009); Lori Kaufman (High School intern, Summer 2011); Juliana Mesa-Garcia (Undergraduate intern, January – July 2012); Laura Duke (High School intern, Summer 2013), Liwei Deng (Postdoctoral Fellow, 2010-2012); Codi Lazar (Postdoctoral Fellow, 2011-2013); Xiaoming Liu (Postdoctoral Fellow, 2012-2014); Jabrane Labidi (Postdoctoral Fellow, 2013-2015); Natalie Collina (High School intern, Winter 2014); Stephen Elardo (Postdoctoral Associate, 2014-2018); Corliss Kin I Sio (Postdoctoral Fellow, 2014-2016); Peng Ni (Postdoctoral Fellow, 2017-2021); Ada Morral (Undergraduate Intern, Summer 2018), Nicole Nie (Postdoctoral Fellow, 2019-2021), Karalee Brugman (Postdoctoral Fellow, 2020-2022).
Section Editor, Treatise on Geochemistry Third Edition: 2021-2024
President-elect, SEDI Section, American Geophysical Union: 2021-2023
Steering Committee; PI Search Committee; Facilities Committee, COMPRES/GSECARS Merger: 2021
Organizer for the Advances in Synchrotron-Based Research Workshop: 2021
Short Course Committee, Mineralogical Society of America: 2021-2024
Editor, Geochemical Perspective Letters: 2020 -
Executive Committee Member, COMPRES: 2018-2021
Ethics Committee Member, Geochemical Society: 2016-2020
Secretary, American Geophysical Union, VGP Section: 2016-2018
Nifty Fifty Speaker for the USA Science and Engineering Festival: 2016, 2018, 2019, 2020
Instructor at Smithsonian Teacher’s Training Workshop: 2011, 2012
Judge: Howard University Middle School Science Fair, 2010
Co-author on article on Peer Mentorship entitled “In Person: Career GPS” in the March 16, 2012 issue of Science Careers
Convener: Sessions at 2009 AGU, 2010 Goldschmidt, 2011 Goldschmidt, 2011 AGU, 2016 Goldschmidt, Theme Chair Goldschmidt 2014, 2019, 2020
Referee: Science, Nature, GCA, EPSL, Chemical Geology, Geostandards and Geoanalytical Research, NSF, NASA, European Journal of Mineralogy
Panelist: NSF, NASA, Scialog (Research Corporation)
DCO 2020 Task Force
Mineralogical Society of America, Fellow
American Geophysical Union
Geological Society of America