Staff, Post-doc, and Student, Principle Investigator.


Blusztajn, J., Nielsen, S.G., Marschall, H.R., Shu, Y., Ostrander, C.M., Hanyu, T. (2018) Thallium isotope systematics in volcanic rocks from St. Helena - constraints on the origin of the HIMU reservoir. Chemical Geology 476, 292-301.


H. Song, H. Song, T. J. Algeo, J. Tong, S. J. Romaniello, Y. Zhu, D. Chu, Y. Gong, A. D. Anbar (2017) Uranium and carbon isotopes document global-ocean redox-productivity relationships linked to cooling during the Frasnian-Famennian mass extinction. Geology 45, 887-890.
M. Cheng, C. Li, L. Zhou, L. Feng, T. J. Algeo, F. Zhang, S. Romaniello, C. Jin, H. Ling, S. Jiang (2017) Transient deep-water oxygenation in the early Cambrian Nanhua Basin, South China. Geochimica et Cosmochimica Acta 210, 42-58.
Chen, X., Romaniello, S.J., Anbar, A.D. (2017) Uranium isotope fractionation induced by aqueous speciation: Implications for U isotopes in marine CaCO3 as a paleoredox proxy. Geochimica et Cosmochimica Acta 215, 162-172.
Ostrander, C.M., Owens, J.D., Nielsen, S.G. (2017) Constraining the rate of oceanic deoxygenation leading up to a Cretaceous Oceanic Anoxic Event (OAE-2: ~94Ma). Science Advances 3, e1701020.
Owens, J.D., Nielsen, S.G., Horner, T.J., Ostrander, C.M., Peterson, L. (2017) Thallium-isotopic compositions of euxinic sediments as a proxy for global manganese-oxide burial. Geochimica et Cosmochimica Acta 213, 291-307.
Marsteller, S.J., Knudson, K.J., Gordon, G., and Anbar, A.D. (2017). Biogeochemical reconstructions of life histories as a method to assess regional interactions: Stable oxygen and radiogenic strontium isotopes and Late Intermediate Period mobility on the Central Peruvian Coast. J. Archaeol. Sci. Reports, 13: 535-546.
M. Elrick, V. Polyak, T. J. Algeo, S. Romaniello, Y. Asmerom, A. D. Herrmann, A. D. Anbar,, L., Zhao, and Z. Q. Chen (2017). Global-ocean redox variation during the middle-late Permian through Early Triassic based on uranium isotope and Th/U trends of marine carbonates. Geology, 45.2: 163-166.
B. Kendall, T. W. Dahl, and A.D. Anbar, (2017). Good Golly, Why Moly? The Stable Isotope Geochemistry of Molybdenum. Rev. Mineral. Geochem. 82: 683-732
G. A. Brennecka, L. E. Borg, S. J. Romaniello, A. K. Souders, Q. R. Shollenberger, N. E. Marks, M. Wadhwa (2017) A renewed search for short-lived 126 Sn in the early Solar System: Hydride generation MC-ICPMS for high sensitivity Te isotopic analysis. Geochimica et Cosmochimica Acta 201, 331-344.


A. D. Anbar, C. B. Till, and M. A. Hannah (2016). Bridging the planetary divide. Nature 539: 25-27.
A. D. Anbar, S. J. Romaniello, B. R. Allenby, and W. S. Broecker (2016). Addressing the Anthropocene. Environmental Chemistry, (Rowland Tribute Series paper).
X. Chen, S. J. Romaniello, A. D. Herrmann, L. E. Wasylenki, and A. D. Anbar (2016). Uranium Isotope Fractionation During Coprecipitation with Aragonite and Calcite. Geochimica et Cosmochimica Acta 188: 189-207.
N. R. Hinkel, P. A. Young, M. D. Pagano, S. J. Desch, A. D. Anbar, V. Adibekyan, S. Blanco-Cuaresma, J. K. Carlberg, E. D. Mena, F. Liu, and T. Nordlander (2016). A Comparison of Stellar Elemental Abundance Techniques and Measurements. The Astrophysical Journal Supplement Series, doi:10.3847/0067-0049/226/1/4
S. J. Romaniello, A. D. Herrmann, and A. D. Anbar (2016). Syndepositional diagenetic control of molybdenum isotope variations in carbonate sediments from the Bahamas. Chemical Geology 438: pp.84-90.
S. K. Sahoo, N. J. Planavsky, G. Jiang, B. Kendall, J. D. Owens, X. Wang, X. Shi, A. D. Anbar, and T. W. Lyons (2016). Oceanic oxygenation events in the anoxic Ediacaran ocean. Geobiology, 10.1111/gbi.12182
M. Cheng, C. Li, L. Zhou, T. J. Algeo, F. Zhang, S. Romaniello, C-S Jin, L-D Lei, L-J Feng, S-Y Jiang (2016) Marine Mo biogeochemistry in the context of dynamically euxinic mid-depth waters: A case study of the lower Cambrian Niutitang shales, South China. Geochimica et Cosmochimica Acta 183, 79-93.


B. T. Cartledge, A. R. Marcotte, A. D. Anbar, P. Herckes, and B. J. Majestic (2015). The impact of particle size, relative humidity, and sulfur dioxide on iron solubility in simulated atmospheric marine aerosols. Environmental Science & Technology 49: 7179-7187.

#M. B. Channon, G. W. Gordon, J. L. L. Morgan, J. L. Skulan, S. M. Smith and A. D. Anbar (2015). Using natural, stable calcium isotopes of human blood to detect and monitor changes in bone mineral balance. Bone 77: 69-74.

F. Zhang, X. Zhu, B. Yan, B. Kendall, X. Peng, J. Li, T. J. Algeo, S. Romaniello (2015) Oxygenation of a Cryogenian ocean (Nanhua Basin, South China) revealed by pyrite Fe isotope compositions. Earth and Planetary Science Letters 429, 11-19.

M. Stylo, N. Neubert, Y. Wang, N. Monga, S. J. Romaniello, S. Weyer, R. Bernier-Latmani (2015) Uranium isotopes fingerprint biotic reduction. Proceedings of the National Academy of Sciences 112, 5619-5624.

B. Kendall, R. A. Creaser, C. Reinhard, T. W. Lyons, and A. D. Anbar (2015). Transient episodes of mild environmental oxygenation and oxidative continental weathering during the late Archean. Science Advances, 1:e1500777.

#B. Kendall, T. Komiya, T. W. Lyons, S. M. Bates, G. W. Gordon, S, J. Romaniello, and A. D. Anbar (2015). Uranium and molybdenum isotope evidence for an episode of widespread ocean oxygenation during the late Ediacaran Period. Geochimica et Cosmochimica Acta, 156: 173-193.

*M. Neveu, A. T. Poret‐Peterson, A. D. Anbar, and J. J. Elser (2015). Ordinary stoichiometry of extraordinary microorganisms. Geobiology. DOI: 10.1111/gbi.12153

#S. J. Romaniello, M. P. Field, H. B. Smith, G. W. Gordon, M. H. Kim, and A. D. Anbar (2015). Fully automated chromatographic purification of Sr and Ca for isotopic analysis. Journal of Analytical Atomic Spectrometry, 30: 1906-1912.

E. E. Stüeken, R. Buick, and A. D. Anbar (2015). Selenium isotopes support free O2 in the latest Archean. Geology, 43: 259-262.



#G. W. Gordon, J. Monge, M. B. Channon, Q. Wu, J. L. Skulan, A. D. Anbar and R. Fonseca (2014). Predicting multiple myeloma disease activity by analyzing natural calcium isotopic composition. Leukemia doi:10.1038/leu.2014.193.

L. E. Wasylenki, J. W. Swihart, S. J. Romaniello (2014) Cadmium isotope fractionation during adsorption to Mn oxyhydroxides at low and high ionic strength. Geochimica et Cosmochimica Acta 140, 212-226.

M. B. Andersen, S. Romaniello, D. Vance, S. H. Little, R. Herdman, T. W. Lyons (2014) A modern framework for the interpretation of 238U/235U in studies of ancient ocean redox. Earth and Planetary Science Letters 400, 184-194.

¶K. T. Goto, A. D. Anbar, G. W. Gordon, S. J. Romaniello, G. Shimoda, Y. Takaya, A. Tokumaru, R. Nozaki, K. Suzuki, S. Machida, T. Hanyu and A. Usui (2014). Uranium isotope systematics of ferromanganese crusts in the Pacific Ocean: Implications for the marine 238U/235U isotope system. Geochim. Cosmochim. Acta 146: 43-58.

*M. Neveu, A. T. Poret-Peterson, Z. M. P. Lee, A. D. Anbar and J. J. Elser (2014). Prokaryotic cells separated from sediments are suitable for elemental composition analysis. Limnol. Oceanogr.: Methods 12: 519-529.

P. A. Young, S. J. Desch, A. D. Anbar, R. Barnes, N. R. Hinkel, R. Kopparapu, N. Madhusudhan, N. Monga, M. D. Pagano, M. A. Riner, E. Scannapieco, S-H. Shim and A. Truitt (2014). Astrobiological stoichiometry. Astrobiology 14: 603-626.

S. J. Desch, P. A. Young, A. D. Anbar, N. Hinkel, M. Pagano, A. Truitt and M. Turnbull (2014). Report on a NASA Astrobiology Institute-funded Workshop Without Walls:Stellar Stoichiometry. Astrobiology DOI: 10.1089/ast.2014.1157.

C. P. McKay, A. D. Anbar, C. Porco and P. Tsou (2014). Follow the plume: the habitability of Enceladus. Astrobiology DOI: 10.1089/ast.2014.1158.

T. F. Nägler, A. D. Anbar, C. Archer, T. Goldberg, G. W. Gordon, N. D. Greber, C. Siebert, Y. Sohrin, and D. Vance (2014). Proposal for an international molybdenum isotope measurement standard and data representation. Geostand. Geoanal. Res. 38: 149-151.



*J. B. Glass, A. Chappaz, B. Eustis, A. C. Heyvaert, D. Waetjen, H. E. Hartnett and A. D. Anbar (2013). Molybdenum geochemistry in a seasonally dysoxic Mo-limited lacustrine ecosystem. Geochim. Cosmochim. Acta, 114: 204-219.

*J. B. Glass, A. T. Poret-Peterson, F. Wolfe-Simon and A. D. Anbar (2013). Molybdenum limitation induces expression of the molybdate-binding protein Mop in a freshwater nitrogen-fixing cyanobacterium. Adv. Microbiol. 3: 9-15.

T. Goldberg, G. Gordon, G. Izon, C. Archer, C. R. Pearce, J. McManus, A. D. Anbar and M. Rehkämper (2013). Resolution of inter-laboratory discrepancies in Mo isotope data: an intercalibration. J. Anal. At. Spectrom.DOI: 10.1039/C3JA30375F.

#B. Kendall, G. A. Brennecka, S. Weyer and A. D. Anbar (2013). Uranium isotope fractionation suggests oxidative uranium mobilization at 2.50 Ga. Chem. Geol. 362: 105-114.

Y. Marusenko, J. Shipp, G. A. Hamilton, J. L.L. Morgan, M. Keebaugh, H. Hill, A. Dutta, X. Zhuo, N. Upadhyay, J. Hutchings, P. Herckes, A. D. Anbar, E. Shock and H. E. Hartnett (2013). Bioavailability of nanoparticulate hematite to Arabidopsis thalianaEnviron. Pollut. 174: 150-156.

*C. Mead, J. R. Lyons, T. M. Johnson and A. D. Anbar (2013).  Unique Hg stable isotope signatures of compact fluorescent lamp-sourced Hg. Env. Sci. Tech. 47: 2542-2547.

*C. Mead, P. Herckes, B. J. Majestic and A. D. Anbar (2013). Source apportionment of aerosol iron in the marine environment using iron isotope analysis. Geophys. Res. Lett. 40: 5722-5727.

*S. Romaniello, A. D. Herrmann and A. D. Anbar (2013). Uranium concentrations and 238U/235U isotope ratios (238U/235U) in modern carbonates from the Bahamas: assessing a novel paleoredox proxy. Chem. Geol. 362: 305-316.

C. Scott, N. J. Planavsky, C. L. DuPont, B. Kendall, B. C. Gill, L. J. Robbins, K. F. Husband, G. L. Arnold, B. A. Wing, S. W. Poulton, A. Bekker, A. D. Anbar, K. O. Konhauser and T. W. Lyons (2013). Bioavailability of zinc in marine systems through time. Nature (Geoscience) 6: 125-128. 



*G. L. Arnold, T. W. Lyons, G. W. Gordon and A. D. Anbar (2012). Extreme change in sulfide concentrations in the Black Sea during the Little Ice Age reconstructed using molybdenum isotopes. Geology 40: 595-598.

A. Chappaz, T. W. Lyons, G. Gordon and A. D. Anbar (2012). Isotopic fingerprints of anthropogenic molybdenum in lake sediments. Env. Sci. Tech. 46: 10934-10940.

#A. D. Herrmann, B. Kendall, T. J. Algeo, G. W. Gordon, L. E. Wasylenki and A. D. Anbar (2012). Anomalous molybdenum isotope trends in Upper Pennsylvanian euxinic facies: Significance for use of d98Mo as a global marine redox proxy. Chem. Geol. 324-325: 87-98.

*J. L. L. Morgan, J. L. Skulan, G. W. Gordon, S. J. Romaniello, S. M. Smith and A. D. Anbar (2012). Rapidly assessing changes in bone mineral balance using natural stable calcium isotopes. Proc. Nat. Acad. Sci. 109: 9989-9994.

J. D. Owens, T. W. Lyons, X. Li, K. G. Macleod, G. Gordon, M. M. M. Kuypers, A. Anbar, W. Kuhnt and S. Severmann. (2012). Iron isotope and trace metal records of iron cycling in the proto-North Atlantic during the Cenomanian-Turonian oceanic anoxic event (OAE-2). Paleoceanography 27, PA3223, 13 pp.

¶S. K. Sahoo, N. J. Planavsky, B. Kendall, X. Wang, X Shi, C. Scott, A. D. Anbar, T. W. Lyons and G. Jiang (2012). Ocean oxygenation in the wake of the Marinoan glaciation. Nature, 489: 546-549.

P. Tsou, D. E. Brownlee, C. P. McKay, A. D. Anbar, H. Yano, K. Altwegg, L. W. Beegle, R. Dissly, N. J. Strange and I. Kanik (2012). LIFE: Life Investigation For Enceladus, A Sample Return Mission Concept in Search for Evidence of Life. Astrobiology 12: 730-742.



*G. A. Brennecka, A. D. Herrmann, T. J. Algeo and A. D. Anbar (2011). Rapid expansion of oceanic anoxia immediately before the end-Permian extinction. Proc. Nat. Acad. Sci. 108: 17631-17634; doi/10.1073/pnas.1106039108.

¶T. W. Dahl, D. E. Canfield, M. T. Rosing, R. Frei, G. W. Gordon, A. H. Knoll and A. D. Anbar (2011). Molybdenum evidence for expansive sulfidic water masses in ~750 Ma oceans. Earth Planet. Sci. Lett. 311: 264-274.

¶T. W. Dahl, E. U. Hammarlund, A. D. Anbar, D. P. G. Bond, B. C. Gill, G. W. Gordon, A. H. Knoll, A. T. Nielsen, N. H. Schovsbo and D. E. Canfield (2011) Reply to Butterfield: Devonian rise in atmospheric oxygen correlated to the radiations of terrestrial plants and large predatory fish. Proc. Nat. Acad. Sci. 108: E29; doi: 10.1073/pnas.1018818108.

*J. L. Morgan, G. W. Gordon, C. Arrua, J. Skulan, T. D. Bullen and A. D. Anbar (2011). High precision measurement of variations in calcium isotope ratios in urine by multiple collector inductively coupled plasma mass spectrometry (MC-ICP-MS). Anal. Chem. 83: 6956-6962.

#B. Kendall, G. W. Gordon, S. W. Poulton and A. D. Anbar (2011). Molybdenum isotope constraints on the extent of late Proterozoic ocean euxina. Earth Planet. Sci. Lett. 307: 450-460.

#L. E. Wasylenki, C. L. Weeks, J. R. Bargar, T. G. Spiro, J. R. Hein and A. D. Anbar (2011). The molecular mechanism of Mo isotope fractionation during adsorption to birnessite. Geochim. Cosmochim. Acta 75: 5019-5031.

E. S. Boyd, A. D. Anbar, S. Miller, T. L. Hamilton, M. Lavin and J. W. Peters (2011). A late methanogen origin for molybdenum-dependent nitrogenase. Geobiology 9: 221-232. doi: 10.1111/j.1472-4669.2011.00278.x

*G. Brennecka, L. E. Wasylenki, S. Weyer and A. D. Anbar (2011). Uranium isotope fractionation during adsorption to manganese oxides. Env. Sci. Tech. 45: 1370-1375.

¶B. D. Duval, P. Dijkstra, S. A. Natali, J. P. Megonigal, M. E. Ketterer, B. G. Drake, M. T. Lerdau, G. Gordon, A. D. Anbar and B. A. Hungate (2011). Plant-soil distribution of potentially toxic elements in response to elevated atmospheric CO2. Env. Sci. Tech. 45: 2570-2574.

L. J. Liermann, R. Mathur, L. E. Wasylenki, J. Nuester, A. D. Anbar and S. L. Brantley (2011). Extent and isotopic composition of Fe and Mo release from two Pennsylvania shales in the presence of organic ligands and bacteria. Chem. Geol. 281: 167-180.

F. Wolfe-Simon, J. Switzer Blum, T. R. Kulp, G. W. Gordon, S. E. Hoeft, J. Pett-Ridge, J. F. Stolz, S. M. Webb, P. K. Weber, P. C. W. Davies, A. D. Anbar and R. S. Oremland (2011). A bacterium that can grow by using arsenic instead of phosphorus. Science332: 1163 – 1166.

F. Wolfe-Simon, J. Switzer Blum, T. R. Kulp, G. W. Gordon, S. E. Hoeft, J. Pett-Ridge, J. F. Stolz, S. M. Webb, P. K. Weber, P. C. W. Davies, A. D. Anbar and R. S. Oremland (2011). Response to Comments on “A bacterium that can grow by using arsenic instead of phosphorus”. ScienceDOI: 10.1126/science.1202098

R. Raiswell, C. T. Reinhard, A. Derkowski, J. Owens, S. H. Bottrell, A. D. Anbar and T. W. Lyons (2011). Formation of syngenetic and early diagenetic iron minerals in the late Archean Mt. McRae Shale, Hamersley Basin, Australia: New insights on the patterns, controls and paleoenvironmental implications of authigenic mineral formation. Geochim. Cosmochim. Acta 17: 1072-1087; doi:10.1016/j.gCA2010.11.013.



*G. A. Brennecka, S. Weyer, M. Wadhwa, P. Janney, A. D. Anbar and J. Zipfel (2010). 238U/235U variations in meteorites: extant 247Cm and implications for Pb-Pb dating. Science 327: 449-451; doi: 10.1126/science.1180871.

*G. A. Brennecka, L.E. Borg, I. D. Hutcheon, M. A. Sharp and A. D. Anbar (2010). Natural variations in uranium isotope ratios of uranium ore concentrates: Understanding the 238U/235U fractionation mechanism. Earth Planet. Sci. Lett. 291: 228-233; doi: 10.1016/j.epsl.2010.01.023.

¶T. W. Dahl, A. D. Anbar, G. W. Gordon, M. T. Rosing, R. E. Frei and D. E. Canfield (2010). The behavior of molybdenum and its isotopes across the chemocline and in the sediments of sulfidic Lake Cadagno, Switzerland. Geochm. Cosmochim. Acta 74: 144-163; doi: 10.1016/j.gCA2009.09.018.

¶T. W. Dahl, E. U. Hammarlund, A. D. Anbar, D. P. G. Bond, B. C. Gill, G. W. Gordon, A. H. Knoll, A. T. Nielsen, N. H. Schovsbo and D. E. Canfield (2010) Devonian rise in atmospheric oxygen correlated to the radiations of terrestrial plants and large predatory fish. Proc. Nat. Acad. Sci. 107: 17911-17915; doi: 10.1073/pnas.1011287107.

*Y. Duan, A. D. Anbar, G. L. Arnold, T. W. Lyons, G. W. Gordon and B. Kendall (2010). Molybdenum isotope evidence for mild environmental oxygenation before the Great Oxidation Event. Geochim. Cosmochim. Acta 74: 6655-6668; doi: 10.1016/j.epsl.2009.11.052.

*Y. Duan, A. D. Anbar, G. Gordon, S. Severmann, T. W. Lyons and B. Sageman (2010). Isotopic evidence for Fe cycling and repartitioning in ancient oxygen-deficient settings: Examples from black shales of the mid-to-late Devonian Appalachian basin. Earth Planet. Sci. Lett. 290: 244-253; doi: 10.1016/j.epsl.2009.11.052.

*J. Glass, F. Wolfe-Simon, J. J. Elser and A. D. Anbar (2010). Molybdenum–nitrogen co-limitation in freshwater and coastal heterocystous cyanobacteria. Limnol. Oceanogr. 55: 667-676.

#B. Kendall, A. J. Kaufman, C. Reinhard, T. W. Lyons and A. D. Anbar (2010). Pervasive oxygenation along late Archean ocean margins. Nature (Geoscience) 3: 647-652; doi: 10.1038/NGEO942.

K. J. Knudson, H. M. Williams, J. E. Buikstra, P. D. Tomczak, G. W. Gordon and A. D. Anbar (2010). Introducing δ88/86Sr analysis in archaeology: a demonstration of the utility of strontium isotope fractionation in paleodietary studies. J. Archeol. Sci. 37: 2352-2364; doi:10.1016/j.jas.2010.04.009.

R. Mathur, S. Brantley, A. Anbar, F. Munizaga, V. Maksaec, R. Newberry, J. Vervoort and G. Hart (2010). Variation of Mo isotopes from molybdenite in high-temperature hydrothermal ore deposits. Miner. Deposita 45: 43-50; doi: 10.1007/s00126-009-0257-z.

C. Montoya-Pino, S. Weyer, A. D. Anbar, J. Pross, W. Oschmann, B. van de Schootbrugge and H. W. Arz (2010). Global enhancement of ocean anoxia during Oceanic Anoxic Event 2: A quantitative approach using U isotopes. Geology 38: 315-318; doi: 10.1130/G30652.1.

*J. L. Morgan, L. E. Wasylenki and A. D. Anbar (2010). Fe isotope fractionation during Equilibration of Fe-organic Complexes. Env. Sci. Tech. 44: 6095-6101; doi: 10.1021/es100906z.

L. Pratt et al. (2010). The Mars astrobiology explorer-cacher (MAX-C): A potential rover mission for 2018. Astrobiology 10: 127-163; doi: 10.1089/ast.2010.0462.



*H. Beraldi-Campesi, H. E. Hartnett, A. D. Anbar, G. W. Gordon and F. Garcia-Pichel (2009). Effects of biological soil crusts on soil elemental concentrations: implications for biogeochemistry and as traceable biosignatures of ancient life on land. Geobiology 7: 348-359.

#G. W. Gordon, T. W. Lyons, G. L. Arnold, J. E. Roe, B. B. Sageman and A. D. Anbar (2009). When do black shales tell molybdenum isotope tales? Geology 37: 535-538.

T. W. Lyons, A. D. Anbar, S. Severmann, C. Scott and B. C. Gill (2009). Tracking euxinia in the ancient ocean: a multiproxy perspective and Proterozoic case study. Ann. Rev. Earth Planet. Sci. 37, 507-534.

#B. Majestic, A. D. Anbar and P. Herckes (2009). Measuring natural variations of iron isotopic composition in atmospheric aerosols for use in source-apportionment studies. Env. Sci. Tech. 43: 4327-4333.

#B. J. Majestic, A. D. Anbar and P. Herckes (2009). Elemental and iron isotopic composition of aerosols collected in a parking structure. Sci. Total Env. 407: 5104-5109.

J. Garvin, R. Buick, A. D. Anbar, G. L. Arnold and A. J. Kaufman (2009). Isotopic evidence for an aerobic nitrogen cycle in the latest Archean. Science 323: 1045-1048.

*J. B. Glass, F. Wolfe-Simon and A. D. Anbar (2009). Coevolution of marine metal availability and photoautotrophic nitrogen assimilation. Geobiology DOI 10.1111/j.1472-4669.2009.00190.x.

¶B. Kendall, R. A. Creaser, G. W. Gordon and A. D. Anbar (2009). Re-Os, Mo, and Fe isotope systematics of black shales from the Proterozoic Velkerri and Wollogorang Formations, McArthur Basin, Northern Australia.  Geochim. Cosmochim. Acta 73: 2534-2558.

J. A. Mikucki, A. Pearson, D. T. Johnston, A. V. Turchyn, J. Farquhar, D. P. Schrag, A. D. Anbar, J. C. Priscu and P. A. Lee (2009). A contemporary microbially maintained subglacial ferrous ‘ocean’. Science 324: 397 – 400.

H. Ohmoto, B. Runnegar, L. R. Kump, M. L. Fogel, B. Kamber, A. D. Anbar, P. L. Knauth, D. R. Lowe, D. Y. Sumner and Y. Watanabe (2009). Biosignatures in ancient rocks: a summary of discussions at a field workshop on biosignatures in ancient rocks. Astrobiology 8: 883-907.

C. Reinhard, R. Raiswell, C. Scott, A. D. Anbar and T. W. Lyons (2009). A late Archean sulfidic sea stimulated by early oxidative weathering of the continents. Science 326: 713-716.

¶U. Ryb, A. Matthews, Y. Erel, G. Gordon and A. D. Anbar (2009). Large molybdenum isotope variations in a continental rift setting. Geology 37: 463-466.

¶S. Severmann and A. D. Anbar (2009). Reconstructing paleoredox conditions through a multi-tracer approach: the key to the past is the present. Elements 5: 359-364.

#F. Wolfe-Simon, P. C. W. Davies and A. D. Anbar (2009). Did nature also choose arsenic? Internat. J. Astrobiologydoi:10.1017/S1473550408004394.



A. D. Anbar (2008). Elements and evolution. Science 322: 1481-1483.

A. D. Anbar and G. W. Gordon (2008). Redox renaissance. Geology 36: 271-272.

¶C. Scott, T. W. Lyons, A. Bekker, Y. Shen, S. W. Poulton, X. Chu and A. D. Anbar (2008). Tracing the stepwise oxygenation of the Proterozoic ocean. Nature 452: 456-459.

O. F. Overinde, C. L. Weeks, A. D. Anbar and T. G. Spiro (2008). Solution structure of molybdic acid from Raman spectroscopy and DFT analysis. Inorg. Chim. Acta 361: 1000-1007.     

¶S. Severmann, T. W. Lyons, A. D. Anbar, J. McManus and G. Gordon (2008). Modern iron isotope perspective on the benthic iron shuttle and the redox evolution of ancient oceans. Geology36: 487-490.

#L. E. Wasylenki, B. A. Rolfe, C. Weeks, T. Spiro and A. D. Anbar (2008). Experimental investigation of the effects of temperature and ionic strength on Mo isotope fractionation during adsorption to manganese oxides. Geochim. Cosmochim. Acta 72: 5997-6005.

¶S. Weyer, A. D. Anbar, A. Gerdes, G. W. Gordon, T. J. Algeo and E. A. Boyle (2008). Natural fractionation of 238U/235U. Earth Planet. Sci. Lett. 72: 345-359.



P. E. Carrigan, J. G. Hentz, G. Gordon, J. L. Morgan, M. Raimondo, A. D. Anbar and L. J. Miller (2007). Distinctive heavy metal composition of pancreatic juice in patients with pancreatic carcinoma. Cancer, Epidemiol., Biomarkers Prevent.16: 2656-2663.

A. D. Anbar, Y. Duan, T. W. Lyons, G. L. Arnold, B. Kendall, R. A. Creaser, A. J. Kaufman, G. Gordon, C. Scott, J. Garvin and R. Buick (2007). A whiff of oxygen before the Great Oxidation Event? Science 317: 1903-1906.

A. J. Kaufman, D. T. Johnston, J. Farquhar, A. L. Masterson, T. W. Lyons, S. Bates, A. D. Anbar, G. L. Arnold, J. Garvin and R. Buick (2007). Late Archean biospheric oxygenation and atmospheric evolution. Science 317: 1900-1903.

#L. E. Wasylenki, A. D. Anbar, L. J. Liermann, R. Mathur, G. W. Gordon and S. L. Brantley (2007). Isotope fractionation during microbial metal uptake measured by MC-ICP-MS. J. Anal. Atom. Spectr. 22: 905-910.

L. Liermann, E. Hausrath, A. D. Anbar and S. L. Brantley (2007). Assimilatory and dissimilatory processes of microorganisms affecting metals in the environment. J. Anal. Atom. Spectr. 22: 867-877.

A. D. Anbar and O. Rouxel (2007). Metal stable isotopes in paleoceanography. Ann. Rev. Earth Planet. Sci. 35: 717-746.

K. O. Konhauser, L. Amskold, S. V. Lalonde and A. Anbar (2007). Decoupling photochemical Fe(II) oxidation from shallow-water BIF deposition. Earth Planet Sci. Lett, 258: 87-100.

J. Skulan, T. Bullen, A. D. Anbar, J. E. Puzas, L. Shackelford, A. LeBlanc and S. Smith (2007). Natural calcium isotopic composition of urine as a marker of bone mineral balance. Clin. Chem. 53: 1155-1158.

C. L. Weeks, A. D. Anbar, L. E. Wasylenki and T. G. Spiro (2007). DFT analysis of molybdenum isotope fractionation. J. Phys. Chem. A 111: 12434-12438. See also correction in 112: 10703 (2008).

S. Weyer, A. D. Anbar, G. P. Brey, C. Munker, K. Mezger and A. B. Woodland (2007). Fe-isotope fractionation during partial melting on Earth and the current view on the Fe-isotope budgets of the planets (Reply to the comment of F. Poitrasson and to the comment of B.L. Beard and C.M. Johnson on "Iron isotope fractionation during planetary differentiation" by S. Weyer, A. D. Anbar, G. P. Brey, C. Munker, K. Mezger and A. B. Woodland). Earth Planet Sci. Lett. 56: 638-646.



A. D. Anbar, A. Jarzecki and T. Spiro (2005). Theoretical investigation of iron isotope fractionation between Fe(H2O)63+ and Fe(H2O)62+: implications for iron stable isotope geochemistry. Geochim. Cosmochim. Acta 69: 825-837.

A. D. Anbar, G. L. Arnold, T. W. Lyons and J. Barling (2005). Response to comment on “Molybdenum isotope evidence for widespread anoxia in mid-Proterozoic oceans”. Science 309: doi:10.1126/science.1105521.

B. M. Jakosky, A. D. Anbar, D. Des Marais, D. Morrison and N. R. Pace (2005). Don’t dismiss astrobiology. Science 308: 496.

L. J. Liermann, A. Marin, V. LeBron, R. L. Guynn, J. Barling, A. D. Anbar and S. L. Brantley (2005). Metal-targeted dissolution of silicates by soil bacteria. Chem. Geol. 220: 285-302.

S. Weyer, C. Münker, G. Brey, A. Woodland, K. Metzger and A. D. Anbar (2005). Iron isotope fractionation during planetary differentiation. Earth Planet Sci. Lett. 240: 251-264.



A. D. Anbar (2004). Molybdenum stable isotopes: Observations, interpretations and directions. Rev. Mineral. Geochem. 55: 429-454.

*G. L. Arnold, A. D. Anbar, J. Barling and T. W. Lyons (2004). Molybdenum isotope evidence of widespread anoxia in mid-Proterozoic oceans. Science 304: 87-90.

S. L. Brantley, L. J. Liermann, A. D. Anbar, G. A. Icopini, R. L. Guynn and J. Barling (2004). Fe isotopic fractionation during mineral dissolution with and without bacteria. Geochim. Cosmochim. Acta 68: 3189-3204.

A. Jarzecki, A. D. Anbar and T. Spiro (2004). DFT investigation of vibrational spectra of Fe(H2O)63+ and Fe(H2O)62+. J. Phys. Chem. A 108: 2726-2732.

G. A. Icopini, S. Ruebush, M. Tien, A. D. Anbar and S. L. Brantley (2004). Iron isotope fractionation during microbial reduction of iron: the importance of adsorption. Geology 32: 205-208.

A. D. Anbar (2004). Iron stable isotopes: beyond biosignatures. Earth Planet. Sci. Lett. (Frontiers) 217: 223-236.

*G. L. Arnold, S. Weyer and A. D. Anbar (2004). Iron isotope variations in natural materials measured using high mass resolution MC-ICP-MS. Anal. Chem. 76: 322-327.

#J. Barling and A. D. Anbar (2004). Molybdenum isotope fractionation during adsorption by manganese oxides. Earth Planet. Sci. Lett. 217: 315-329.

O. Katz, M. Beyth, N. Mille, R. Stern, D. Avigad, A. R. Basu and A. D. Anbar (2004). A Late Neoproterozoic (~630 Ma) Boninitic Suite from southern Israel: Implications for the consolidation of Gondwanaland. Earth Planet. Sci. Lett. 218: 475-490.



*J. E. Roe, A. D. Anbar and J. Barling (2003). Nonbiological fractionation of Fe isotopes: Evidence of an equilibrium isotope effect. Chem. Geol. 195: 69-85.



A. D. Anbar and A. H. Knoll (2002). Proterozoic ocean chemistry and evolution: A bioinorganic bridge? Science 297, 1137-1142.



#J. Barling, G. L. Arnold and A. D. Anbar (2001). Natural mass-dependent variation in the isotopic composition of molybdenum. Earth Planet. Sci. Lett.  193: 447-457.

M. Sharma, M. L. Polizzotto and A. D. Anbar (2001). Iron isotopes in hydrothermal fluids at the Juan de Fuca ridge. Earth Planet. Sci. Lett. 194: 39-51.

A. D. Anbar, K. A. Knab and J. Barling (2001). Precise determination of mass-dependent variations in the isotopic composition of Mo using MC-ICP-MS.  Anal. Chem. 73: 1425-1431.

A. D. Anbar, K. J. Zahnle, G. L. Arnold and S. J. Mojzsis (2001). Extraterrestrial iridium, sediment accumulation and the habitability of the early Earth’s surface.  J. Geophys. Res. 106: 3219-3236.

P. A. Karam, S. A. Leslie and A. D. Anbar (2001). The effects of changing atmospheric oxygen concentrations and background radiation levels on radiogenic DNA damage rates. Health Phys.81: 545-553.

A. D. Anbar (2001). Iron isotope biosignatures: promise and progress. EOS  83: 173, 178-179.