selected publications
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chapter
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Cerro Negro volcano, Nicaragua: An assessment of geological and potential biological systems on early Mars.
Special Papers.
279-285.
2011
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What Can Carbon Isotopes Tell Us About Sources of Reduced Carbon in Rocks from the Early Earth?.
291-311.
2011
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The Habitability of Mars: Past and Present.
159-175.
2006
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Cerro Negro volcano, Nicaragua: An assessment of geological and potential biological systems on early Mars.
Special Papers.
279-285.
2011
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conference proceeding
- Hydrogen generation for microbial activity in ultramafic-hosted hydrothermal systems. Geochimica et Cosmochimica Acta. A686-A686. 2010
- Investigations of the roles of minerals in hydrothermal organic geochemistry. Geochimica et Cosmochimica Acta. A686-A686. 2010
- Constraints on hydrogen generation during serpentinization of ultramafic rocks. Geochimica et Cosmochimica Acta. A611-A611. 2008
- Habitability of serpentinizinig systems for methanogenic microorganisms: An energy balance model. Geochimica et Cosmochimica Acta. A383-A383. 2008
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Compound specific isotope analysis and the challenge for identifying life: The role of biosignatures and abiosignatures.
Geochimica et Cosmochimica Acta.
A582-A582.
2006
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Isotopic signatures of abiotic organic synthesis under geologic conditions.
Geochimica et Cosmochimica Acta.
A407-A407.
2006
- Carbon and hydrogen isotope measurements in abiogenic hydrocarbon synthesis. Geochimica et Cosmochimica Acta. A557-A557. 2005
- Energetic constraints on subsurface biomass production within the igneous ocean crust. Geochimica et Cosmochimica Acta. A200-A200. 2005
- Experimental study of abiotic formation of organic compounds in hydrothermal systems. Geochimica et Cosmochimica Acta. A259-A259. 2004
- DISSOLVED CARBON MONOXIDE IN HYDROTHERMAL FLUIDS ON SOLAR SYSTEM BODIES: EXPERIMENTAL STUDY OF REACTIVITY AND ORGANIC SYNTHESIS. Meteoritics and Planetary Science. A132-A132. 2003
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journal article
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Rare occurrence of jarosite-alunite solid solutions with intermediate Al-Fe contents in the Jurassic Aztec Sandstone, Nevada, USA.
American Mineralogist: an international journal of earth and planetary materials.
1626-1639.
2025
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Clumped Isotope Signatures of Abiotic Methane: The Role of the Combinatorial Isotope Effect.
Journal of Geophysical Research. Solid Earth.
2024
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Formation of mixed-layer sulfide-hydroxide minerals from the Tochilinite-Valleriite group during experimental serpentinization of olivine.
American Mineralogist: an international journal of earth and planetary materials.
61-72.
2024
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The metabolic rate of the biosphere and its components.
Proceedings of the National Academy of Sciences of USA.
2023
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Proposed Origin of the Burns Formation (Meridiani Planum, Mars) by Erosion, Reworking, and Diagenetic Alteration of a Grasberg-Like Precursor.
Journal of Geophysical Research: Planets.
2023
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Relatively oxidized fluids fed Earth's earliest hydrothermal systems.
Science.
582-585.
2023
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Chemistry of springs across the Mariana forearc: Carbon flux from the subducting plate triggered by the lawsonite-to-epidote transition?.
Geochimica et Cosmochimica Acta.
1-20.
2023
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Experimental serpentinization of iron-rich olivine (hortonolite): Implications for hydrogen generation and secondary mineralization on Mars and icy moons.
Geochimica et Cosmochimica Acta.
98-110.
2022
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Proposed Origin of the Burns Formation (Meridiani Planum, Mars) by Erosion, Reworking, and Diagenetic Alteration of a Grasberg-like Precursor
2022
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Hydrogen generation from serpentinization of iron-rich olivine on Mars, icy moons, and other planetary bodies.
Icarus.
2022
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Microbial Communities in a Serpentinizing Aquifer Are Assembled through Strong Concurrent Dispersal Limitation and Selection.
mSystems.
2021
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Geochemical data indicate highly similar sediment compositions for the Grasberg and Burns formations on Meridiani Planum, Mars.
Earth and Planetary Science Letters.
2021
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Hydrogen generation and iron partitioning during experimental serpentinization of an olivine-pyroxene mixture.
Geochimica et Cosmochimica Acta.
55-75.
2020
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A dynamic microbial sulfur cycle in a serpentinizing continental ophiolite.
Environmental Microbiology.
2329-2345.
2020
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The effect of pH on rates of reaction and hydrogen generation during serpentinization.
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences.
2020
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Hydrogen and Abiotic Hydrocarbons: Molecules that Change the World.
Elements (Ottawa): an international magazine of mineralogy, geochemistry, and petrology.
13-18.
2020
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Sulfur Cycling and Mass Balance at Meridiani, Mars.
Geophysical Research Letters.
11728-11737.
2019
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Experimental Constraints on Abiotic Formation of Tubules and Other Proposed Biological Structures in Subsurface Volcanic Glass.
Astrobiology.
53-63.
2019
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Serpentinization: Connecting Geochemistry, Ancient Metabolism and Industrial Hydrogenation.
Life.
2018
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Geochemical Trends in the Burns Formation Layered Sulfate Deposits at Meridiani Planum, Mars, and Implications for Their Origin.
Journal of Geophysical Research: Planets.
2393-2429.
2018
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Jarosite and Alunite in Ancient Terrestrial Sedimentary Rocks: Reinterpreting Martian Depositional and Diagenetic Environmental Conditions.
Life.
2018
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Phosphorous Immobility During Formation of the Layered Sulfate Deposits of the Burns Formation at Meridiani Planum.
Journal of Geophysical Research: Planets.
1230-1254.
2018
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Methane Dynamics in a Tropical Serpentinizing Environment: The Santa Elena Ophiolite, Costa Rica.
Frontiers in Microbiology.
2017
-
Biosignature Preservation and Detection in Mars Analog Environments.
Astrobiology.
363-+.
2017
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Serpentinization-Influenced Groundwater Harbors Extremely Low Diversity Microbial Communities Adapted to High pH.
Frontiers in Microbiology.
2017
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Abiotic methane formation during experimental serpentinization of olivine.
Proceedings of the National Academy of Sciences of USA.
13965-13970.
2016
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Thermodynamic constraints on the formation of condensed carbon from serpentinization fluids.
Geochimica et Cosmochimica Acta.
391-403.
2016
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Generation of Hydrogen and Methane during Experimental Low-Temperature Reaction of Ultramafic Rocks with Water.
Astrobiology.
389-406.
2016
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Temperature trends for reaction rates, hydrogen generation, and partitioning of iron during experimental serpentinization of olivine.
Geochimica et Cosmochimica Acta.
175-200.
2016
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Investigation of extractable organic compounds in deep-sea hydrothermal vent fluids along the Mid-Atlantic Ridge.
Geochimica et Cosmochimica Acta.
122-144.
2015
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Experimental constraints on fluid-rock reactions during incipient serpentinization of harzburgite.
American Mineralogist: an international journal of earth and planetary materials.
991-1002.
2015
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Detection of iron substitution in natroalunite-natrojarosite solid solutions and potential implications for Mars.
American Mineralogist: an international journal of earth and planetary materials.
948-964.
2014
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The influence of minerals on decomposition of the n-alkyl-alpha-amino acid norvaline under hydrothermal conditions (vol 104, pg 330, 2013).
Geochimica et Cosmochimica Acta.
418-418.
2014
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Assessment of environmental controls on acid-sulfate alteration at active volcanoes in Nicaragua: Applications to relic hydrothermal systems on Mars.
Journal of Geophysical Research: Planets.
2083-2104.
2013
-
From serpentinization to carbonation: New insights from a CO2 injection experiment.
Earth and Planetary Science Letters.
137-145.
2013
-
Compositional controls on hydrogen generation during serpentinization of ultramafic rocks.
Lithos.
55-69.
2013
-
Chemical and mineralogical trends during acid-sulfate alteration of pyroclastic basalt at Cerro Negro volcano and implications for early Mars.
Journal of Geophysical Research: Planets.
1719-1751.
2013
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The energetics of organic synthesis inside and outside the cell.
Philosophical Transactions of the Royal Society B: Biological Sciences.
2013
-
Hydrogen generation from low-temperature water-rock reactions.
Nature Geoscience.
478-484.
2013
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Experimental study of acid-sulfate alteration of basalt and implications for sulfate deposits on Mars.
Journal of Geophysical Research: Planets.
577-614.
2013
-
Serpentinites, Hydrogen, and Life.
Elements (Ottawa): an international magazine of mineralogy, geochemistry, and petrology.
129-134.
2013
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The influence of minerals on decomposition of the n-alkyl-α-amino acid norvaline under hydrothermal conditions.
Geochimica et Cosmochimica Acta.
330-357.
2013
-
Laboratory Simulations of Abiotic Hydrocarbon Formation in Earth's Deep Subsurface.
Reviews in Mineralogy and Geochemistry.
467-494.
2013
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Miller-Urey and Beyond: What Have We Learned About Prebiotic Organic Synthesis Reactions in the Past 60 Years?.
Annual Review of Earth and Planetary Science.
207-229.
2013
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Abiogenic methanogenesis during experimental komatiite serpentinization: Implications for the evolution of the early Precambrian atmosphere.
Chemical Geology.
102-112.
2012
-
Catabolic and anabolic energy for chemolithoautotrophs in deep-sea hydrothermal systems hosted in different rock types.
Geochimica et Cosmochimica Acta.
5736-5748.
2011
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The effect of methanogenesis on the geochemistry of low temperature water-Fe-0-basalt reactions.
Applied Geochemistry.
S318-S318.
2011
-
Chemistry of hot springs along the Eastern Lau Spreading Center.
Geochimica et Cosmochimica Acta.
1013-1038.
2011
- Acid-sulfate weathering pathways at Cerro Negro, Nicaragua. Geochimica et Cosmochimica Acta. A668-A668. 2010
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The influence of carbon source on abiotic organic synthesis and carbon isotope fractionation under hydrothermal conditions.
Geochimica et Cosmochimica Acta.
2717-2740.
2010
-
Thermodynamic constraints on hydrogen generation during serpentinization of ultramafic rocks.
Geochimica et Cosmochimica Acta.
856-875.
2009
-
Geochemical constraints on sources of metabolic energy for chemolithoautotrophy in ultramafic-hosted deep-sea hydrothermal systems.
Astrobiology.
933-950.
2007
-
Abiotic synthesis of organic compounds in deep-sea hydrothermal environments.
Chemical Reviews.
382-401.
2007
-
Geochemistry - Biosignatures and abiotic constraints on early life.
Nature.
E18-E18.
2006
-
Bedrock formation at Meridiani Planum - Reply.
Nature.
E2-E2.
2006
-
Carbon isotope composition of organic compounds produced by abiotic synthesis under hydrothermal conditions.
Earth and Planetary Science Letters.
74-84.
2006
-
A volcanic environment for bedrock diagenesis at Meridiani Planum on Mars.
Nature.
1129-1131.
2005
-
Geomicrobiology in oceanography: microbe-mineral interactions at and below the seafloor.
Trends in Microbiology.
449-456.
2005
-
A thermodynamic assessment of energy requirements for biomass synthesis by chemolithoautotrophic micro-organisms in oxic and anoxic environments.
Geobiology.
135-144.
2005
-
Hydrogen and bioenergetics in the Yellowstone geothermal ecosystem.
Proceedings of the National Academy of Sciences of USA.
2555-2560.
2005
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Neutrophilic iron-oxidizing bacteria in the ocean: Their habitats, diversity, and roles in mineral deposition, rock alteration, and biomass production in the deep-sea.
Geomicrobiology Journal: an international journal of geomicrobiology and microbial biogeochemistry.
393-404.
2004
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Experimental constraints on the hydrothermal reactivity of organic acids and acid anions: I. Formic acid and formate.
Geochimica et Cosmochimica Acta.
3625-3644.
2003
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Experimental study of the hydrothermal reactivity of organic acids and acid anions: II. Acetic acid, acetate, and valeric acid.
Geochimica et Cosmochimica Acta.
3645-3664.
2003
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Seafloor bioalteration of sulfide minerals: Results from in situ incubation studies.
Geochimica et Cosmochimica Acta.
2843-2856.
2003
-
Biological potential of martian hydrothermal systems.
Astrobiology.
407-414.
2003
-
Formation of meteorite hydrocarbons from thermal decomposition of siderite (FeCO3).
Geochimica et Cosmochimica Acta.
311-317.
2003
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INTERPRETATION OF PLANETARY RADAR OBSERVATIONS - THE RELATIONSHIP BETWEEN ACTUAL AND INFERRED SLOPE DISTRIBUTIONS.
Journal of Geophysical Research: Planets.
1173-1184.
1993
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Rare occurrence of jarosite-alunite solid solutions with intermediate Al-Fe contents in the Jurassic Aztec Sandstone, Nevada, USA.
American Mineralogist: an international journal of earth and planetary materials.
1626-1639.
2025