Geoffrey J. Gilleaudeau
NASA Astrobiology Postdoctoral Fellow
Arizona State University
School of Earth and Space Exploration
550 East Tyler Mall
Tempe, AZ 85287, USA
[email protected]
Education
University of Tennessee: Ph.D., Earth and Planetary Sciences (2007-2013)
Dissertation advisor: Linda C. Kah
Dissertation title: Stratigraphic and geochemical investigation of the Mesoproterozoic Atar and
El Mreiti groups, Mauritania: insights into carbon cycling and ocean redox stratification in a
low oxygen world
Binghamton University: Bachelor of Arts, Geosciences (2003-2007)
Thesis advisors: Robert V. Demicco and David M. Jenkins
Employment
NASA Astrobiology Postdoctoral Fellow: hosted at Arizona State University (2016-present)
Research Advisor: Ariel D. Anbar
Proposal title: The cycling of nitrogen and transition metals in low oxygen greenhouse oceans:
evidence from redox proxies, metal abundances, and molybdenum/nitrogen isotopes
Carlsberg Foundation Postdoctoral Fellow: University of Copenhagen, Denmark (2014-2016)
Research Advisor: Robert Frei
Proposal title: Chromium isotopes in Mesoproterozoic carbonates: a novel proxy for assessing
the history of Earth surface oxygenation
Visiting Assistant Professor: Bucknell University (Fall 2013)
Graduate Teaching Assistant: University of Tennessee (2008-2013)
National Science Foundation GK-12 Fellow: University of Tennessee (2007-2008)
Publications
Gilleaudeau, G.J., Voegelin, A.R., Thibault, B., Moreau, J., Ullmann, C.V., Korte, C., Frei, R.,
in preparation. Stable isotope records of the K-Pg boundary in a restricted basin: insights from
the chromium isotope system. Geochemistry, Geophysics, Geosystems.
Gilleaudeau, G.J., Sahoo, S.K., Kaufman, A.J., Jiang, G., Kah, L.C., Henderson, M.A., Korte,
C., Ullmann, C.V., Frei, R., in preparation. Proterozoic carbonates of the Vindhyan Basin, India:
chemostratigraphy and diagenesis. Precambrian Research.
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Zhang, F., Xiao, S., Kendall, B., Romaniello, S.J., Cui, H., Meyer, M., Gilleaudeau, G.J.,
Kaufman, A.J., Anbar, A.D., submitted. Extensive ocean anoxia decimated the Ediacara biota.
Proceedings of the National Academy of Sciences.
Wei, W., Frei, R., Gilleaudeau, G.J., Li, D., Wei, G., Chen, X., Ling H., submitted. Monitoring
redox fluctuations on the Yangtze Platform from the Ediacaran to early Cambrian: a chromium
isotope perspective. Earth and Planetary Science Letters.
D’Arcy, J., Gilleaudeau, G.J., Peralta, S., Gaucher, C., Frei, R., submitted. Redox fluctuations
in the Early Ordovician oceans: an insight from chromium stable isotopes. Chemical Geology.
Paulukat, C., Gilleaudeau, G.J., Chernyavskiy, P., Frei, R., in revision. The Cr-isotope signature
of surface seawater—a global perspective. Chemical Geology.
Gilleaudeau, G.J., Frei, R., Kaufman, A.J., Kah, L.C., Azmy, K., Bartley, J.K., Chernyavskiy,
P., Knoll, A.H., 2016. Oxygenation of the mid-Proterozoic atmosphere: clues from chromium
isotopes in carbonates. Geochemical Perspectives Letters 2, 178-187.
Gilleaudeau, G.J., Kah, L.C., 2015. Heterogeneous redox conditions and a shallow chemocline
in the Mesoproterozoic ocean: evidence from carbon-sulfur-iron relationships. Precambrian
Research 257, 94-108.
Gilleaudeau, G.J., Kah, L.C., 2013. Oceanic molybdenum drawdown by epeiric sea expansion
in the Mesoproterozoic. Chemical Geology 356, 21-37.
Gilleaudeau, G.J., Kah, L.C., 2013. Carbon isotope records in a Mesoproterozoic epicratonic
sea: carbon cycling in a low-oxygen world. Precambrian Research 228, 85-101.
Jenkins, D.M., Gilleaudeau, G.J., Kawa, C., Dibiase, J.M., Fokin, M., 2012. Compositional
limits and analogs of monoclinic triple-chain silicates. Contributions to Mineralogy and
Petrology 164, 229-244.
Teaching
Core to Crust (University of Copenhagen): Guest lectures
Principles of Geochemistry (University of Copenhagen): Guest lectures
Evolution of the Earth (Bucknell University): Lectures, labs, and 14 field trips
Sedimentology and Stratigraphy (University of Tennessee): Guest lectures, labs, and field trips
Earth, Life, and Time (University of Tennessee): Guest lectures and labs
Structural Geology (University of Tennessee): Labs and grading
Heritage Middle School (GK-12 Program): Seventh grade classroom scientist
Grants and Awards
NASA Postdoctoral Program Fellowship (2016-2018): ~$140,000
Carlsberg Foundation Postdoctoral Fellowship (2015-2016): 1.2 million Danish kroner
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Graduate Student Research Grants (2007-2008): >$10,000
• Society for Sedimentary Geology (SEPM)
• Geological Society of America (GSA)
• American Association for Petroleum Geologists (AAPG)
• Evolving Earth Foundation
• Barringer Family Fund for Meteorite Impact Research
Student Awards (2007-2011):
• Best Student Presentation in Earth and Planetary Sciences
• Graduate Student Teaching Award
• Professional Promise Award in Earth and Planetary Sciences
• Best Student Proposal, GSA Sedimentary Geology Division
• Glenn G. Bartle Undergraduate Award in Geology
Conference Abstracts
Gilleaudeau, G.J., Voegelin, A.R., Thibault, B., Moreau, J., Ullmann, C.V., Korte, C., Frei, R.,
2016. Oceanographic change in the late Cretaceous Chalk Sea (Denmark): clues from chromium
isotopes. Goldschmidt Conference (Yokohama, Japan).
Gilleaudeau, G.J., Frei, R., Kaufman, A.J., Kah, L.C., Azmy, K., Bartley, J.K., Chernyavskiy,
P., Knoll, A.H., 2015. Chromium isotopes in carbonate rocks: new insights into Proterozoic
atmospheric oxygenation. American Geophysical Union Conference (San Francisco, CA).
Gilleaudeau, G.J., Frei, R., Kaufman, A.J., Kah, L.C., Azmy, K., Bartley, J.K., Knoll, A.H.,
2015. Chromium isotopes in carbonates constrain Mesoproterozoic atmospheric pO2 levels.
Goldschmidt Conference (Prague, Czech Republic).
D’Arcy, J.M., Frei, R., Gilleaudeau, G.J., Peralta, S., Kah, L.C., Gaucher, C., 2015. The
chromium isotopic composition of an Early to Middle Ordovician marine carbonate platform,
eastern Precordillera, San Juan, Argentina. Goldschmidt Conference (Prague, Czech Republic).
Gilleaudeau, G.J., Sahoo, S.K., Kah, L.C., Henderson, M.A., Frei, R., Kaufman, A.J., 2014.
Integrated chemostratigraphy of Upper Vindhyan Sequence carbonates, central India:
implications for depositional age and global correlations. GSA Abstracts with Programs 46
(Vancouver, Canada).
Gilleaudeau, G.J., Kah, L.C., 2013. Tracking the chemocline in ancient oceans: an example
from the Mesoproterozoic of Mauritania. GSA Abstracts with Programs 45, 628 (Denver, CO).
Pewitt, M.L., Kah, L.C., Gilleaudeau, G.J., 2013. Redox structure of Mesoproterozoic shale
derived from sulfide minerals and mineral texture. GSA Abstracts with Programs 45, 114
(Denver, CO).
Gilleaudeau, G.J., Kah, L.C., 2012. Influence of global sea level on the Proterozoic oceanic
molybdenum inventory. GSA Abstracts with Programs 44, 459 (Charlotte, NC).
Gilleaudeau, G.J., Kah, L.C., 2011. Considerations on the use of iron, carbon, and sulfur
paleoredox proxies in low sulfate Proterozoic oceans: an example from the Mesoproterozoic
Touirist Formation, Mauritania. GSA Abstracts with Programs 43, 656 (Minneapolis, MN).
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Gilleaudeau, G.J., Kah, L.C., 2010. Molar-tooth crack formation and the Proterozoic marine
substrate: insights from the Belt Supergroup, Montana and the Atar Group, Mauritania. GSA
Abstracts with Programs 42, 137 (Denver, CO).
Aden, D.J., Milam, K.A., Kah, L.C., Gilleaudeau, G.J., 2010. Determining a formational
mechanism for a Mauritanian Mesoproterozoic (1.1 Ga) breccia. GSA Abstracts with Programs
42, 92 (Denver, CO).
Aden, D.J., Milam, K.A., Kah, L.C., Gilleaudeau, G.J., 2009. An anomalous breccia in the
Mesoproterozoic (~1.1 Ga) Atar Group, Mauritania: potential evidence for an impact-generated
tsunami. Lunar and Planetary Science Conference (Houston, TX).
Gilleaudeau, G.J., Demicco, R.V., Chernyavskiy, P., 2008. Carbonate shrubs in travertines of
Tivoli, Italy: can morphology be used to distinguish between biotic and abiotic precipitates?
GSA Abstracts with Programs 40, 9 (Charlotte, NC).
Field Work and Sample Collection
North China (summer 2016); geologic surveys of Ohio, Kentucky, and Tennessee (spring 2016);
NASA GHOST terrestrial analogue research team, Green River, Utah (spring 2016); Botanical
Museum collections, Harvard University (2014, 2016); Hunstrup, northern Jutland, Denmark
(2015); Stevns Klint, Denmark (2015); Vindhyan Basin, north-central India (2012); Ordovician
of east Tennessee (2010); REPSOL core facility, Spain (2010); Wintershall core facility,
Germany (2010); Belt Supergroup, northwest Montana (2009); Alamo, south-central Nevada
(2009); Indiana University field mapping course, western Montana (2008); High Andes,
Argentina (2008)
Service
Frequent journal referee: Geology; Nature Scientific Reports; Proceedings of the National
Academy of Sciences; Geochimica et Cosmochimica Acta; Precambrian Research;
Paleogeography, Paleoclimatology, Paleoecology
Executive Secretary, NASA PSTAR proposal panel review (2016)
Invited Judge, NASA Astrobiology Speech Competition (2016)
Invited Session Chair, GSA Meeting 2013: Precambrian Geology
Student Representative, GSA Sedimentary Geology Division (2009-2011)
Invited Session Chair, GSA Meeting 2010: Carbonate Sediments: from Microbes to Sequences,
Insights into Processes Governing Carbonate Deposition
Outreach
15 hours/week hands-on science activities with seventh graders in rural east Tennessee (NSF
GK-12 Program, 2007-2008)
Two invited lectures: East Tennessee Geological Society (2008, 2011)
Science outreach volunteer: Walland Elementary School, rural east Tennessee (2011)
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Invited research outreach presentation: O’Conner Senior Center, Knoxville, TN (2009)
University of Tennessee McClung Museum Teaching Volunteer (2008-2009)
Professional Affiliations
Geological Society of America; European Association of Geochemistry; American Geophysical
Union
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