Lawrence Livermore National Laboratory



Thomas Kruijer

Postdoctoral Appointment


 +1 925-422-9262

DegreeDiscipline/InstitutionYear
Ph.D. Isotope Cosmochemistry
ETH Z├╝rich
2013
M.Sc. Geology and Isotope Geochemistry
VU University Amsterdam
2009
Bachelor Earth Sciences
VU University Amsterdam
2008

Research Interests

My research is aimed at determining when and how planets formed and evolved over time. In particular, I attempt to reconstruct the processes and chronology of events that occurred during the earliest stages of Solar System history, more than 4.5 billion years ago. To this end, I measure small-scale isotopic variations in extraterrestrial rock samples, such as meteorites and lunar rocks, by utilizing isotope ratio mass spectrometry techniques. I have used the isotopic signatures of such samples to study diverse aspects of early Solar System evolution, including:

  • the early evolution of the solar protoplanetary disk
  • the origin, accretion, and core formation history of protoplanets
  • the genetic heritage of planetary building blocks
  • the accretion and early differentiation of larger planetary bodies such as the Earth, Mars, and Jupiter
  • the origin and early evolution of the Moon

To accomplish the research outlined above, I have developed and implemented (i) methods for high-precision measurements on novel isotope systems, as well as (ii) state-of-the-art techniques for clean-lab sample preparation and element purification. My main tool of choice has been the short-lived 182Hf-182W chronometer, which is ideally suited for studying planetary accretion and core formation as well as early silicate differentiation in the mantles of planetary bodies.

Honors and Awards

  • Escher prize (2010)
  • ETH Medal (2014)

Selected Publications

Kruijer T.S., Kleine T. (2017) Tungsten isotopes and the origin of the Moon. Earth and Planetary Science Letters, in press.

Kruijer T.S., Kleine T., Borg L.E., Brennecka G.A., Fischer-Gödde M., Irving A.J., Bischoff A., Agee C.B. (2017) The early differentiation of Mars inferred from Hf-W chronometry. Earth and Planetary Science Letters, in press (doi.org/10.1016/j.epsl.2017.06.047).

Kruijer T.S., Kleine T., Burkhardt C., Budde G. (2017) Age of Jupiter inferred from the distinct genetics and formation times of meteorites. Proceedings of the National Academy of Sciences of the United States of America 114, 6712-6716.

Krabbe N., Kruijer T.S., Kleine T. (2017) Tungsten stable isotope compositions of terrestrial samples and meteorites determined by double spike MC-ICPMS. Chemical Geology 450, 135-154.

Dale C.W., Kruijer T.S., Burton K.W. (2017) Highly siderophile element and 182W evidence for a partial late veneer in the source of 3.8 Ga rocks from Isua, Greenland. Earth and Planetary Science Letters 454, 293-303.

Budde G., Burkhardt C., Brennecka G.A., Fischer-Gödde M., Kruijer T.S., Kleine T. (2016) Molybdenum isotopic evidence for the origin of chondrules and a distinct heritage of carbonaceous and non-carbonaceous meteorites. Earth and Planetary Science Letters 454, 293-303.

Budde G., Kleine T., Kruijer T.S., Burkhardt C., Metzler K. (2016) Tungsten isotopic evidence for the age and origin of chondrules. Proceedings of the National Academy of Sciences of the United States of America 113, 2886-2891.

Fischer-Gödde M., Burkhardt C., Kruijer T.S., Kleine T. (2015) Ru isotope heterogeneity in the solar protoplanetary disk. Geochimica et Cosmochimica Acta 168, 151-171.

Matthes M., Fischer-Gödde M., Kruijer T.S., Leya I., Kleine T. (2015) Pd-Ag chronometry of iron meteorites: correction of neutron capture-effects and application to the cooling history of differentiated protoplanets. Geochimica et Cosmochimica Acta 169, 45-62.

Cook D.L., Kruijer T.S., Kleine, T (2015) Reply to comment by Peters et al. (2015) on “Cosmogenic 180W variations in meteorites and re-assessment of a possible 184Os–180W decay system” Geochimica et Cosmochimica Acta 169, 240-243.

Kruijer T.S., Kleine T., Fischer-Gödde M., Sprung (2015) Lunar tungsten isotopic evidence for the late veneer. Nature 520, 534-537.

Budde G., Kruijer T.S., Fischer-Gödde M., Irving A.J., Kleine T (2015) Planetesimal differentiation revealed by the Hf-W systematics of ureilites. Earth and Planetary Science Letters 430, 316-325.

Kruijer T.S., Touboul M., Fischer-Gödde M., Bermingham K, Kleine T., Walker R.J. (2014) Protracted core formation and rapid accretion of protoplanets. Science 344, 1150-1154.

Kruijer T.S., Kleine T., Fischer-Gödde M., Burkhardt C., Wieler, R. (2014) Nucleosynthetic W isotope anomalies and the Hf-W chronometry of Ca-Al-rich inclusions.  Earth and Planetary Science Letters 403, 317-327.

Cook D.L., Kruijer T.S., Kleine, T (2014) 180W anomalies in iron meteorites: Implications for p-process heterogeneity in the Solar Nebula. Geochimica et Cosmochimica Acta 140, 160-176.

Kruijer T.S., Sprung P., Kleine T., Leya I., Wieler R. (2013) Abundance and isotopic composition of Cd in iron meteorites. Meteoritics and Planetary Science 48, 2597-2607.

Kruijer T.S., Fischer-Gödde M., Kleine T., Sprung P., Leya I., Wieler R. (2013) Neutron capture on Pt isotopes in iron meteorites and the Hf-W chronology of core formation in planetesimals. Earth and Planetary Science Letters 361, 162-172.

Kruijer T.S., Sprung P., Kleine T., Leya I., Burkhardt C., Wieler R. (2012) Hf-W chronometry of core formation in planetesimals inferred from weakly irradiated iron meteorites. Geochimica et Cosmochimica Acta 99, 287-304.