Clark Johnson, PI (UW-Madison)

Interests include application of stable (C, S, Mg, Ca, Si, and Fe) and radiogenic (Rb-Sr, Sm-Nd, Lu-Hf, and U-Th-Pb) isotope geochemistry to determining ancient paleoenvironments and the evolution of microbial metabolisms in the Precambrian Earth and on Mars. Experimental studies of stable isotope fractionation. Web site.

Brian Beard, Co-I (UW-Madison)

Research interests in isotope geochemistry include development of new stable isotope systems such as Ca, Mg, and Fe, including the calibration of isotopic fractionation factors between minerals and fluids and development of new analytical techniques to measure these isotope compositions. Geochronology and petrogenesis of Martian igneous rocks and this work is being pursued by analysis of SNC group meteorites. Development of new instrumentation to conduct remote isotope analysis on Mars. Web site.

boydEric Boyd, Co-I (Montana State University)

Microorganisms are inextricably linked to the environments that they inhabit; a relationship that undoubtedly results in adaptation at the genomic and physiological levels. My research utilizes contemporary and systems microbiological approaches to better understand the genetics and physiology of biological sulfur and hydrogen cycling. Web site.

cavosieAaron Cavosie, Co-I (Curtin University)

The origin, growth, and modification of the crust, with a special emphasis on the early Earth and meteorite impact processes. Major focus on use accessory minerals such as zircon, monazite, or others to address different petrologic processes. Web site.

Max Coleman, Co-I (JPL)

Integration of different relevant scientific disciplines to understand how natural systems work, especially as applied to astrobiology and sedimentary systems; specialties include stable isotope geochemistry (C, O, S, Cl). Joint appointment at JPL in Planetary Habitability Science and the Center for Life Detection. Web site.

pePascale Ehrenfreund, Co-I (George Washington)

The interdisciplinary research program led by Dr. Ehrenfreund includes interstellar and planetary chemistry with a current main emphasis on investigation of organic molecules in comets, meteorites and on planetary surfaces, and to calibrate/optimize instrumentation for life detection on Mars. Web site.

eilerJohn Eiler, Co-I (Caltech)

The isotope geochemistry of light elements (H, C, N, O and S), as applied to: the origin and evolution of igneous rocks; the origin and evolution of meteorites; planetary atmospheres; atmospheric and environmental chemistry; paleoclimate; and paleontology. Web site.

ferrariKay Ferrari, Co-I (JPL)

The Education and Public Outreach effort will focus on sharing information gathered from biosignature experiments, and the subsequent conclusions reached, by the Astrobiology Research Consortium teams with students in grades K-12, educators and with general public audiences. Oversees volunteer outreach and education programs, including NASA/JPL Solar System Ambassadors, Solar System Educators and the Museum Alliance. Web site.

norstedBrooke Norsted, Co-I (UW-Madison)

As Assistant Director of the UW Geology Museum and the Education and Public Outreach Lead for the WARC NAI team. Brooke has a keen interest in hosting science-themed events in unusual places (like libraries and ballparks) as well as a commitment to introducing young men and women to science careers. Web site.

Quinn Photo reducedRichard Quinn, Co-I (SETI/NASA-Ames)

Research interests include the study of biomarker preservation potential in planetary and space environments, modeling of chemical processes occurring on the surface of Mars, and the development of technologies for in-situ planetary exploration. Web site.

Eric Roden, Co-I (UW-Madison)

Research areas include geomicrobiology and aquatic biogeochemistry, with an emphasis on the physiology and ecology of metal-respiring bacteria and microbial cycling of metals; microbial mineral transformations; and novel lithotrophic metabolic pathways. Web site.

romanekChristopher Romanek, Co-I (Furman University)

Research specialty in stable isotope and sedimentary geochemistry of carbonate minerals; biomineralization and geomicrobiology; planetary geochemistry; isotope tracers in biological and inorganic systems; mass spectrometry, electron-beam imaging/elemental analysis, and other micro-analytical techniques.

schopf_jwWilliam Schopf, Co-I (UCLA)

Precambrian paleontology, with an emphasis on confocal laser scanning microscopy and Raman and fluorescence spectroscopic imagery to analyze, in three dimensions and at submicron-resolution, the cellular morphology and molecular-structural chemistry of ancient fossil microorganisms entombed in rocks. Web site.

valleyJohn Valley, Co-I (UW-Madison)

Determining the surface conditions of the ancient Earth (up to 4.4. b.y. ago) through studies of the oldest terrestrial zircons using light stable isotopes such as Li and O; determining the genesis and biogenicity of proposed Archean microfossils and host cherts through O, C, S, and Si isotope studies; developing new insights into the fine-scale isotopic variability of ancient samples using the new Wisc-SIMS ion microprobe facility. Web site.

xuHuifang Xu, Co-I (UW-Madison)

Investigations include studies of the surface and interior properties of minerals, with an emphasis on phase formation and reactivity of minerals in biologic and abiologic systems as studied by X-ray diffraction (XRD), transmission electron microscopy (TEM) (TEM), transmission electron microscopy (STEM), and computer modeling using density function theory (DFT). Web site.


fournelleJohn Fournelle (UW-Madison; Director, Electron Microprobe Lab and SEM Lab)

Micro-chemical analysis of minerals, evolution of volcanic rocks.

hessBrian Hess (UW-Madison; Director, Thin Section Lab)

Preparation of samples for micro-analytical work.

Franklin Hobbs (UW-Madison; Manager, The S.W.Bailey XRD laboratory)
X-ray diffractometry

Taylor Kelly (Research Associate, SETI Institute/NASA ARC)

Investigating preservation and recovery of biomarkers in space environments.

Victoria Khoo (UW-Madison)

Administration and geochemistry

kitaNoriko Kita (UW-Madison; Director, Wisc-SIMS Ion Microprobe Lab)

Micro-isotopic analysis of terrestrial and extraterrestsrial samples, and development of new micro-analytical methods.

SONY DSCKouki Kitajima (UW-Madison; Wisc-SIMS Ion Microprobe Lab)

Ion microprobe analysis.

kudryavtsevAnatoliy Kudryavtsev (UCLA; Scientist),

Confocal laser and 3D Raman spectroscopy of organic matter and fossils.

Mason Neuman (UW-Madison)

Isotope geochemistry

slaughterRich Slaughter (UW-Madison)
 Director of Geology Museum.
Maciej Sliwinski  (UW-Madison)

Development of SIMS standards for in situ analysis of oxygen and carbon isotope ratios in complex Ca-Mg-Fe-Mn carbonates.

spicuzzaMike Spicuzza (UW-Madison; Stable Isotope Geochemistry Lab)

Specialization in laser-based fluorination methods for O isotope analysis; three-isotope O isotope analyis in terrestrial and extraterrestrial samples.


Maximiliano Amenabar (Montana State University)

Genetics and physiology of microorganisms involved in the biogeochemical cycling of Fe and S

Kathryn Bywaters (SETI Institute/NASA ARC)
Investigating preservation and recovery of biomarkers in space environments.

Piyali Chanda (UW-Madison)
Experimental studies of Fe and S isotope fractionation during microbial reduction of pyrite and Fe(III) hydroxides under acidic conditions

Antoine Crémière (JPL) 

Stable isotope geochemistry and mineral biosignatures

Huan Cui h_cui(UW-Madison)

Study sulfur 4-isotopes across the GOE in the Huronian of Ontario to investigate coupling of the atmosphere and ocean.

Shaomei He (UW-Madison)

Microbiology, biogeochemistry, genomics.

SatkoskiAaron Satkoski (UW-Madison)

U-Pb geochronology of Archean jaspers and BIFs, stable Fe isotope geochemistry, Sr isotope evolution of the Archean oceans.

Xinyuan Zheng (UW-Madison)

Experimental studies of stable Si isotope geochemistry and application to Proterozoic and Archean marine sedimentary rocks.


Tyler Blum (UW-Madison)

Atom Probe Tomography and SIMS studies of Hadean zircons.

Evan_Cameron_smallEvan Cameron (UW-Madison)

Origin of Jack Hills Hadean zircons.

Morgan Cox (Curtin University)

Shocked zircons of the Jack Hills.

Yihang Fang (UW-Madison)

Formation mechanisms of dolomite and its environmental implications.

SONY DSCNathaniel Fortney (UW-Madison)

Geomicrobiology of metal respiration in hot spring environments.

Mitchell Freyermuth (Furman University)

Carbonate formation mechanisms.

Franklin Hobbs (UW-Madison)

Crystallization mechanism of low-temperature Mg-Ca-carbonates


Seungyeol_Lee_smallSeungyeol Lee (UW-Madison)

Mineralogy and crystal chemistry of Fe nano phases.

Yizhou Lu (UW-Madison)

Crystal chemistry of biotic and abiotic Mn-oxide nano-minerals

levittNick Levitt (UW-Madison)

Clumped isotope thermometry, paleoclimatology as inferred from Archean carbonates.

Otto Magee (UW-Madison)

Crystal chemistry and magnetic property of magnetic Fe-oxide minerals

Stephanie Napieralski (UW-Madison)

Diversity of chemolithotrophic iron-oxidizing communities.



Joost Aerts (University of Amsterdam)
Satoshi Akanuma (Waseda University)
Rasmus Andreasen (University of Houston)
Bill Baker (Furman University)
Roman Barco (University of Southern California)
Sebastian Behrens (University of Minnesota)
Nic Beukes (University of Johannesburg, South Africa)
David Bish (Indiana University)
James Boles (UCSB)
Julien Bourdet (CSIRO)
Philip Brown (UW-Madison)
Paul Carpenter (Washington University)
Georgio Casaburi (University of Florida)
Cyril Cayron (École Polytechnique Fédérale de Lausanne)
Suvankar Chakraborty (University of Utah)
Yimeng Chen (CAMECA Instruments, Inc.)
John Cosgrove (Imperial College, London)
Hervé Cottin (Laboratoire Interuniversitaire des Systèmes Atmosphériques, Universités Paris-Est Créteil)
Andrew Czaja (University of Cincinnati)
James Darling (University of Portsmouth)
Adam Denny (UW-Madison)
Kenneth Edgett (Malin Space Science Systems)
Andreas Elsaesser (Leiden University)
David Emerson (Bigelow Laboratory for Ocean Sciences)
Timmons Erickson (Lunar and Planetary Institute)
Carola Espinoza (Universidad de Concepción)
Thomas Fairchild (University of São Paulo)
David Flannery (University of New South Wales)
Jamie Foster (University of Florida)
Phil Fralick (Lakehead University)
Andrew Frierdich (UW-Madison)
Victor Gallardo (Universidad de Concepción)
Amanda aka Meg Galsworthy (University of Leeds)
Amanda Garcia (UCLA)
Sanjeev Gupta (Imperial College London)
Jenz Gutzmer (University of Johannesburg)
Bradley Guy (University of Johannesburg, South Africa)
Paul Hagan (University of Miami)
Trinity Hamilton (University of Cincinnati)
Tim Hanks (Furman University)
Zoe Harrold (Montana State University)
Elisabeth Hausrath (University of Nevada Las Vegas)
Adriana Heimann (East Carolina University)
Tony Irving (University of Washington)
Concepcion Jimenez-Lopez (University of Granada)
David Johnston (Harvard University)
Andreas Kappler (University of Tuebingen)
Tom Kelly (CAMECA Instruments, Inc.)
Chris Kirkland (Curtin University)
Kouki Kitajima (UW-Madison)
Hiromi Konishi (Niigata University)
Reinhard Kozdon (Rutgers)
Kideok Kwon (Kangwon National University)
Daniel Lahr (University of São Paulo)
Tom Lapen (University of Houston)
David Larson (CAMECA Instruments, Inc.)
Weiqiang Li (University of Nanjing)
Artemis Louyakis (University of Florida)
Donald Lowe (Stanford University)
Mike Malin (Malin Space Science Systems)
Zita Martins (Imperial College London)
Michelle Minitti (Planetary Science Institute)
Jennifer Mobberley (University of Florida)
Stephanie Montalvo (Curtin University)
Luana Morais (University of São Paulo)
Des Moser (University of Western Ontario)
Alexander Nemchin (Curtin University)
Noah Nhleko (University of Johannesburg)
Shuhei Ono (MIT)
Ian Orland (UW-Madison)
Jeffrey Osterhout (UCLA)
Richard Quinn (NASA)
Niki Parenteau (NASA Ames Research Center)
Mark Pearce (CSIRO)
Alberto Perez-Huerta (University of Alabama, Tuskalusa)
John Peters (Washington State University)
Pascal Philippot (IPGP, University of Paris)
Noah Planavsky (Yale University)
Ty Prosa (CAMECA Instruments, Inc.)
Steve Reddy (Curtin University)
Mark Reed (University of Oregon)
Pam Reid (University of Miami)
David Reinhard (CAMECA Instruments, Inc.)
Antonio J. Ricco (Stanford University)
William Rickard (Curtin University)
Minako Righter (University of Houston)
Alejandro Rodriguez Navarro (University of Granada)
Guilherme Romero (University of São Paulo)
Isaac Rudnitzki (University of São Paulo)
Antonio Sanchez Navas (University of Granada)
Mónica Sánchez-Román (Vrije Universiteit Amsterdam)
Farid Salama (NASA)
Haley Sapers (Caltech and USC)
David Saxey (Curtin University)
James Schauer (UW-Madison)
Juergen Schieber (Indiana University)
Martin Schmieder (Lunar and Planetary Institute)
Vladimir Sergeev (Russian Academy of Sciences) sergeev‐
Everett Shock (Arizona State University)
Mark Skidmore (Montana Sate University)
Bertus Smith (University of Johannesburg)
Harald Strauss (Universität Münster)
Ken Sugitani (Nagoya University)
Roger Summons (MIT)
Izabela Szlufarska (UW-Madison)
Cristina Talavera (Curtin University)
Nicholas Timms (Curtin University)
Eric Tohver (University São Paulo)
Claudia Tominski (University of Tuebingen)
Michael Tuite (NASA JPL, Caltech)
Rob Ulfig (CAMECA Instruments, Inc.)
Matthew Urschel (University of Cincinnati)
Takayuki Ushikubo (JAMSTEC)
Martin Van Kranendonk (University of New South Wales)
Peter Visscher (University of Connecticut)
Brook Vitek (University of Miami)
Malcolm Walter (University of New South Wales)
Kenneth Williford (NASA)
Axel Wittmann (Arizona State University)
Akihiko Yamigishi (Tokyo University)
Shin-ichi Yokobori (Tokyo University of Pharmacy and Life Sciences)
Michael Zanetti (University of Western Ontario)



Lucas Berg (UW-Madison)
blotheMarco Blöthe (UW-Madison) postdoctoral fellow

Microbial iron cycling.

CammackJake Cammack (UW-Madison) M.S. degree

Stable O isotope geochemistry of Paleoarchean cherts and carbonates;
evolution of the early oceans; ion microprobe analysis.

chakrabortySuvankar Chakraborty (University of Kentucky) postdoctoral fellow

Bulk and stable isotope geochemistry of mixed cation (Fe-Mg-Ca) carbonates.


Brandon Converse (UW-Madison) collaborator
dAbzacFrancois-Xavier D’Abzac (UW-Madison) postdoctoral fellow

Metal stable isotope analysis via femtosecond laser ablation.

freemanEmily Freeman (UW-Madison) M.S. degree

Role of microbes in formation of nano-magnetite and Fe-bearing smectite during weathering of basaltic rocks.

greinerEdward Greiner (UW-Madison) M.S. degree

Adsorption of amino-acids on meteoritic minerals, to determine potential for delivery mechanisms of pre-biotic
organic compounds to early Earth.

HashmanBreana Hashman (UW-Madison) M.S. degree

Microbial ecosystems in the Mesoarchean.

heckPhillip Heck (UW-Madison) post-doctoral fellow

Applying micro-analysis of Si and O isotope compositions of natural materials especially
Precambrian banded iron formations.

heimannAdriana Heimann (UW-Madison) post-doctoral fellow

Origin of banded iron formations.

honmaAndrew Honma (UW-Madison) M.S. degree

Microbial iron oxidation of basaltic rocks.

hubertyJason Huberty (UW-Madison) M.S. degree

Structure and chemistry of nano-magnetite; mineral phases in BIFs.

Akizumi Ishida (UW-Madison) postdoctoral fellow

Developed new analytical protocol for simultaneous in situ SIMS analysis of C and N isotopes from organic matter.
Stable isotope studies of Precambrian kerogen.

jordanHeather Jordan (UW-Madison) M.S. degree

Assembly of “proto-cell” capable of encapsulated mineral-catalyzed redox activity across lipid membrane.

kabengiNadine Kabengi (University of Kentucky) postdoctoral fellow

Bulk and stable isotope geochemistry of mixed cation (Fe-Mg-Ca) carbonates.

kernJim Kern (UW-Madison; Wisc-SIMS Ion Microprobe Lab)

Micro-analysis of isotopic compositions of natural materials, including O, Si, and Li isotopes.

Issaku Kohl  (NASA-JPL) post-doctoral fellow

Stable isotope geochemistry and mineral biosignatures

konishiHiromi Konishi (UW-Madison) postdoctoral fellow

Nano-structured minerals as tracers of microbial activities.

kozdonReinhard Kozdon (UW-Madison) post-doctoral fellow

S and O isotope thermometry, genesis of Archean cherts.

Kevin Lepot  (UW-Madison) postdoctoral fellow

In situ carbon isotope and Laser Raman studies of microfossils from the 3.4 Ga Strelley Pool Chert.

li_wWeiqiang Li (UW-Madison) postdoctoral fellow

Magnesium stable isotope geochemistry of carbonates and sulfates.

SONY DSCMinglu Liu (UW-Madison) M.S. degree

Role of organic ligands in carbonate formation.

OLYMPUS DIGITAL CAMERAGabriella March (UW-Madison) M.S. degree

Microbial pathways in dolomite formation.

OLYMPUS DIGITAL CAMERARandall Mielke (NASA-JPL) staff member

Laboratory analysis of microbial pyrite oxidation and sulfate mineral formation.

mkhontoDonald Mkhonto (UW-Madison) post-doctoral fellow

Molecular modeling of amino-acid adsorption on calcite.

Euan Monaghan (University of Leiden) Ph.D. degree
Preservation and recovery of biomarkers in space environments.
Navot_Morag1Navot Morag (UW-Madison) post-doctoral fellow

Stable isotope analysis of Proterozoic and Archean sedimentary rocks via ion microprobe.

ortizDayanidi Ortiz (UW-Madison) M.S. degree

Mineral inclusion in 4.0-4.2 Ga zircons, Jack Hills.

percakdennettElizabeth Percak-Dennett (UW-Madison) Ph.D. degree

Coupled Fe-Si cycling during microbial diagenesis in Archean marine systems.

perezgonzalezTeresa Perez Gonzalez (University of Granada, Spain) Ph.D. degree

Iron biomineralization and search for new criteria to distinguish between the inorganic or biogenic origin of magnetites.

ThiruThiruchelvi Reddy (UW-Madison) M.S. degree

Experimental studies of Si and Fe isotope fractionations in Fe-Si minerals.

Andreas Riedo (University of Leiden) post-doctoral fellow

Preservation and recovery of biomarkers in space environments.

sahaiNita Sahai (UW-Madison) Co-I on first NAI grant

Biomolecular-mineral surface interactions in low-temperature aqueous environments, with special emphasis on peptide-mediated mineral precipitation (biomineralization) and cell membrane phospholipid- mineral surface interactions (early evolution of life), as explored through
computational chemistry and experimental studies.

shenZhizhang Shen (UW-Madison) M.S. degree

Microbial dolomite formation.


sinhaMahadeva Sinha (NASA-JPL) Co-I on first NAI grant

Research interests include development of novel technologies for miniature mass spectrometry (MMS) and array detectors for ions. Presently, MMS is being applied for the measurement of chemical and isotopic composition of rock samples using laser ablation for sample introduction.
The science goals are the determination of the role of biotic processes and the paleo-environmental conditions in the formation of minerals in the rocks.

Rie Takagi Fredrickson (UW-Madison; Manager, The S.W.Bailey XRD laboratory)

X-ray diffractometry.

tangalosGeorge Tangalos (UW-Madison) M.S. degree

Microbial Fe reduction and Fe isotope fractionation in sediments.

Bethany Theiling (NASA-JPL) post-doctoral fellow

Stable isotope geochemistry and mineral biosignatures

ushikuboTaka Ushikubo (UW-Madison) post-doctoral fellow

O, C and Li isotope studies of 4.4 to 3.0 Ga zircons and their diamond inclusions.

wuLingling Wu (UW-Madison) post-doctoral fellow

Experimental studies of metal-respiring bacteria and fluid-oxide interactions.

xu_jJie Xu (UW-Madison) Ph.D. degree

Extra-cellular polymeric substances and evolution of cellularity.

yangYang Yang (UW-Madison) post-doctoral fellow

Computational molecular modeling of promoted mechanisms for Mg2+ incorporation into carbonates, as potential biosignatures.

zieglerKaren Ziegler (UCLA) staff member

Work on microbial pyrite oxidation in nature and the lab and sulfate mineral biosignature investigation.

zhangfFangfu Zhang (UW-Madison) Ph.D. degree

Origin of Mg in carbonates and influence of biological and non-biological and non-biological ligands in dolomite formation.

zhouMo Zhou (UW-Madison) M.S. degree

Microbial metal cycling.

zhuChunxiao Zhu (UW-Madison) M.S. degree

Role of extracellular polymeric substances in providing protective shield to Gram positive bacteria against cytotoxicity of specific minerals in the environment.


Jill Banfield (UC Berkeley)
Laurent Binet (Ecole Nationale Suprieure de Chimie de Paris)
Dave Blake (NASA-Ames)
Jen Blank (NASA-Ames)
Benjamin Brunner (University of Bremen)
Marjorie Chan (University of Utah)
Tianhu Chen (Heifei University of Technology, China)
James Cleaves (Carnegie Institute of Washington)
Sylvie Derenne (École Nationale Supérieure de Chimie)
Greg Druschel (University of Vermont)
Jason Dworkin (NASA-Goddard)
Jennifer Eigenbrode (NASA Goddard)
David Emerson (Bigelow Marine Laboratory)
James Farquhar (University of Maryland)
Kate Freeman (Penn State University)
Marilyn Fogel (Carnegie Institute)
Yuri Gorby (Venter Institute)
Geoff Holt (Madison Public School District)
Andreas Kappler (University of Tuebingen)
Kase Klein (University of New Mexico)
Kurt Konhauser (University of Alberta)
Concepcion Jimenez Lopez (University of Granada)
George Luther (University of Delaware)
Jen Macalady (Penn State)
Craig Marshall (Sydney University)
Enrique Merino (Indiana University)
Stephen Moorbath (Oxford University)
Robert Mortimer (Nottingham Trent University)
Alejandro Rodriguez Navarro (University of Granada)
Hiroshi Ohmoto (Penn State University)
Zeb Page (Oberlin)
Peir Pufahl (Acadia University)
Peir Pufahl (Acadia University)
Javier Sanchez (Spanish Geological Survey)
Edwin Schauble (UCLA)
Martin Schoonen (Stony Brook University)
Mark Sephton (Imperial College)
Bruce Simonson (Oberlin)
Michael Spicuzza (UW-Madison)
Mitch Sogin (Woods Hole)
Alan Treiman (NASA-LPI-JSC)
Ellen Van Pay (Green Bay School District)
Yifeng Wang (Sandia National Laboratories)
Simon Wilde (Curtin University)
Kosei Yamaguchi (IFREE-JAMSTEC)
Ed Young (UCLA)