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 Planetary Chemistry and Astrobiology (3225): People
Dimitri  Papanastassiou's Picture
Address:
Jet Propulsion Laboratory
M/S 183-335
4800 Oak Grove Drive
Pasadena, CA 91109
Phone:
818.354.5164
Fax:
818.393.6546
Email Contact:
Curriculum Vitae:

Dimitri Papanastassiou

Education
  • B. S., Physics-Honors, California Institute of Technology (1965)
  • Ph. D., Physics, California Institute of Technology (1970)

Research Interests
  • Formation and evolution of meteorites and planets; establishment of a fine resolution time sequence of condensation and isolation of bodies from the solar nebula
  • Study of correlated isotopic anomalies in meteorites and their connection with specific nucleosynthetic processes. The discoveries have provided strong evidence for the introduction of extremely short-lived nuclides in the early solar system and for the preservation of distinct, exotic nucleosynthetic products at the time of solar system formation
  • Development of high precision and high sensitivity mass spectrometry and ultra-clean sample processing and chemical separations. This has included the acquisition and development a high abundance sensitivity mass spectrometer, modified to reach an abundance sensitivity of 3 x 10-11 amu-1 in the U-Th mass region, which approaches the levels characteristic of accelerator mass spectrometry
  • Study of U-Th series disequilibrium in quartenary volcanics
  • Development of negative ion production techniques and use of these techniques for the study of platinum group elements for research on extraterrestrial materials

Professional Experience
  • Senior Research Scientist, Jet Propulsion Laboratory (1999-present)
  • California Institute of Technology (1970-Present)
    • Faculty Associate in Geochemistry, Div. Geological and Planetary Sciences (1999-Present)
    • Senior Research Associate in Geochemistry (1981-1999)
    • Research Associate in Geochemistry (1976-1981)
    • Instructor in Freshman Physics (1979-1980 and 1971-1972)
    • Senior Research Fellow in Planetary Sciences (1973-1976)
    • Senior Research Fellow in Planetary Sciences and Physics (1972-1973)
    • R. A. Millikan Research Fellow in Physics (1971)
    • Postdoctoral Research Fellow in Physics (1970)

Selected Awards
  • NASA Group Achievement Award Meteorite Isotope Analysis Team (2011)
  • American Geophysical Union, Fellow (1990)
  • NASA, Group Achievement Award, Planetary Materials Curation Team (1983)
  • John Simon Guggenheim Fellow (1982-1983)
  • J. William Fulbright Fellow (1982-1983)
  • NASA Medal for Exceptional Scientific Achievement (1976)
  • Meteoritical Society, Fellow (1976)
  • F. W. Clarke Medal of the Geochemical Society (1972)

Selected Publications

See CV for complete list of publications.

    1. J. H. Chen and D. A. Papanastassiou (2013) Mo isotope evidence for isotope heterogeneity in the early solar system. Geochim. Cosmochim. Acta (Submitted May 2013).
    2. C. Holmden, D. A. Papanastassiou, P. Blanchon, and S. Evans (2012) δ 44/40Ca variability in shallow water carbonates and the impact of submarine groundwater discharge on Ca-cycling in marine environments. Geochim. Cosmochim. Acta 83, 179-194.
    3. N. Dauphas, L. Remusat, J. H. Chen, M. Roskosz, D. A. Papanastassiou, J. Stodolna, Y. Guan, C. Ma, and J. M. Eiler (2010) Neutron-rich chromium isotope anomalies in supernova nanoparticles, Ap. J. 720, 1577-1591.
    4. J. H. Chen, D. A. Papanastassiou, and G. J. Wasserburg (2010) Evidence for endemic Ru isotope anomalies in the early solar system and their preservation in planetary differentiates. Geochim. Cosmochim. Acta 74, 3851-3862.
    5. G. Caro, D.A. Papanastassiou, and G.J. Wasserburg (2010) 40K-40Ca isotopic constraints on the oceanic calcium cycle. Earth Planet. Sci. Lett. 296, 124-132.
    6. J. H. Chen, D. A. Papanastassiou, and G. J. Wasserburg (2009) A search for nickel isotopic anomalies in iron meteorites and chondrites. Geochim. Cosmochim. Acta 73, 1461-1471.
    7. D. W. Beaty, C. C. Allen, D. S. Bass, K. L. Buxbaum, J. K. Campbell, D. J. Lindstrom, S. L. Miller, and D. A. Papanastassiou (2009) Planning considerations for a Mars sample receiving facility. Astrobiology 9, 745-758.
    8. M. E. Zolensky, et al. (incl. D. A. Papanastassiou) (2006) Mineralogy and petrology of comet 81P/Wild 2 nucleus samples. Science 314, 1735-1739.
    9. D. Brownlee, et al. (incl. D. A. Papanastassiou) (2006) Comet 81P/Wild 2 under a microscope. Science 314, 1711-1716.
    10. S. A. Sandford, et al. (incl. D. A. Papanastassiou) (2006) Organics captured from comet 81P/Wild 2 by the Stardust spacecraft. Science 314, 1720-1724.
    11. K. D. McKeegan, et al. (incl. D. A. Papanastassiou) (2006) Isotopic compositions of cometary matter returned by Stardust. Science 314, 1724-1728.
    12. G. J. Flynn, et al. (incl. D. A. Papanastassiou) (2006) Elemental compositions of comet 81P/Wild 2 samples collected by Stardust. Science 314, 1731-1735.
    13. S. Liu, D. A. Papanastassiou, H. H. Ngo, B. P. Glass (2006) Sr and Nd analysis of upper Eocene spherules and their implications for target rocks. Meteor. Planet. Sci. 41, 705-714.
    14. P. T. Doran, S. M. Clifford, S. L. Forman, L. E. Nyquist, D. A. Papanastassiou, B. W. Stewart (and nine authors) (2004) Mars chronology: assessing techniques for quantifying surficial processes. Earth Science Rev. 67, 313-337.
    15. D. Lemarchand, G. J. Wasserburg, and D. A. Papanastassiou (2004) Rate-controlled calcium isotope fractionation in synthetic calcite. Geochim. Cosmochim. Acta 68, 4665-4678.
    16. J. H. Chen, D. A. Papanastassiou, and G. J. Wasserburg (2002) Re-Os and Pd-Ag Systematics in Group IIIAB iron meteorites and in pallasites. Geochim. Cosmochim Acta 66, 3793-3810.
    17. J. Whitehead, J. G. Spray, R. A. F. Grieve, D. A. Papanastassiou, H. H. Ngo, and G. J. Wasserburg (2000) Tracing the source of 36-million-year-old impact ejecta in marine sediments to the Popigai impact crater. Earth Planet. Sci. Lett. 181, 473-487.
    18. P. T. Doran, S. L. Forman, N. C. Sturchio, S. M. Clifford, and D. A. Papanastassiou (2000) Measuring Geologic Time on Mars, Eos, Trans. Amer. Geophys. Union, 81. (Workshop Report).
    19. J. H. Chen, D. A. Papanastassiou, and G. J. Wasserburg (1999) Re-Os systematics in chondrites and the fractionation of the platinum group elements in the early solar system. Geochim. Cosmochim. Acta 62, 3379-3392.
    20. J. J. Shen, D. A. Papanastassiou, and G. J. Wasserburg (1998) Re-Os systematics in pallasites and mesosiderites. Geochim. Cosmochim. Acta 62, 2715-2723.
    21. M. Roy-Barman, G. J. Wasserburg, D. A. Papanastassiou, and M. Chaussidon (1998) Osmium isotopic compositions and Re-Os concentrations in sulfide globules from basaltic glasses. Earth Planet. Sci. Lett. 154, 331-347.
    22. A. D. Anbar, D. A. Papanastassiou, and G. J. Wasserburg (1997) The determination of iridium in natural waters by clean chemical pre-concentration and negative thermal ionization mass spectrometry. Anal. Chem. 69, 2444-2450.
    23. C. Holmden, D. A. Papanastassiou, and G. J. Wasserburg (1997) Negative thermal ionization mass spectrometry of oxygen in phosphates. Geochim. Cosmochim. Acta 61, 2253-2263.
    24. M. Sharma, D. A. Papanastassiou, and G. J. Wasserburg (1997) The concentration and isotopic composition of osmium in the oceans. Geochim. Cosmochim. Acta 61, 3287-3299.
    25. B. W. Stewart, D. A. Papanastassiou, and G. J. Wasserburg (1996) Sm-Nd systematics of a silicate inclusion in the Caddo IAB iron meteorite. Earth Planet. Sci. Lett. 143, 1-12.
    26. D. W. Peate, J. H. Chen, G. J. Wasserburg,, D. A. Papanastassiou, and J. W. Geissman (1996) 238U-230U dating of a geomagnetic excursion in Quaternary basalts of the Albuquerque Volcanic Field, NM (USA). Geophys. Res. Lett. 23, 2271-2274.
    27. A. D. Anbar, G. J. Wasserburg, D. A. Papanastassiou, and P. S. Andersson (1996) Iridium in natural waters. Science 273, 1524-1528.
    28. M. Sharma, D. A. Papanastassiou, G. J. Wasserburg, and R. F. Dymek (1996) The issue of terrestrial 146Sm. Geochim. Cosmochim. Acta 60, 2037-2047.
    29. M. Sharma, D. A. Papanastassiou, G. J. Wasserburg, and R. F. Dymek (1996) The issue of terrestrial 146Sm, A Reply to the Comment by S. B. Jacobsen and C. L. Harper, Jr. Geochim. Cosmochim. Acta 60, 3751-3754.
    30. J. J. Shen, D. A. Papanastassiou, and G. J. Wasserburg (1996) Precise Re-Os determinations and systematics on iron meteorites. Geochim. Cosmochim. Acta 60, 2887-2900.
    31. M. Sharma, G. J. Wasserburg, D. A. Papanastassiou, J. E. Quick, E. V. Sharkov, and E. E. Lazko (1995) High 143Nd/144Nd in extremely depleted mantle rocks. Earth Planet.Sci. Lett. 125, 101-114.
    32. B. W. Stewart, D. A. Papanastassiou, and G. J. Wasserburg (1994) Sm-Nd and Rb-Sr chronology and petrogenesis of mesosiderites. Geochim. Cosmochim. Acta 58, 3487-3509.
    33. J. D. Blum, D. A. Papanastassiou, C. Koeberl, and G. J. Wasserburg (1992) Nd and Sr isotopic study of Australasian tektites: New constraints on the provenance and age of target materials. Geochim. Cosmochim. Acta 56, 483-492.
    34. A. Prinzhofer, D. A. Papanastassiou, and G. J. Wasserburg (1992) Samarium-neodymium evolution of meteorites. Geochim. Cosmochim. Acta 56, 797-815.
    35. A. D. Anbar, R. A. Creaser, D. A. Papanastassiou, and G. J. Wasserburg (1992) Rhenium in seawater: confirmation of generally conservative behavior. Geochim. Cosmochim. Acta 56, 4099-4103.
    36. R. A. Creaser, D. A. Papanastassiou, and G. J. Wasserburg (1991) Negative thermal ion mass spectrometry of Os, Re, and Ir. Geochim. Cosmochim. Acta 55, 397-401.
    37. J. Völkening and D. A. Papanastassiou (1990) Zinc isotope anomalies. Astrophys. J. (Letters) 358, L29-L32.
    38. J. Völkening and D. A. Papanastassiou (1989) Iron isotope anomalies. Astrophys. J. (Letters) 347, L43-L46.
    39. O. Stecher, H. H. Ngo, D. A. Papanastassiou, and G. J. Wasserburg (1989) Nd and Sr isotopic evidence for the origin of tektite material from DSDP site 612 off the New Jersey coast. Meteoritics 24, 89-98.
    40. A. Prinzhofer, D. A. Papanastassiou, and G. J. Wasserburg (1989) The presence of 146Sm in the early solar system and implications for its nucleosynthesis. Astrophys. J. (Letters) 344, L81-L84.

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