My hydrothermal research group aims to understand how high temperature and pressure geologic fluids in the Earth's crust acquire their chemical compositions, specifically how they interact with Earth's lithosphere and biosphere. I work within the Department of Earth Science and the Centre for Deep Sea Research (successor to the Centre for Geobiology), conducting research on topics that include:
● biogeochemical processes controlling the formation and evolution of seafloor hot spring fluids and their inorganic-organic chemistry
● the chemistry of carbon compounds and carbon-sulfur interactions in hydrothermal settings and petroleum systems
● exploration and sampling of new hydrothermal systems in the deep ocean
● the organic geochemistry and biogeochemistry of hydrothermal chimney structures
● laboratory simulations (experiments) of hydrothermal fluid processes to test hypotheses for natural systems
● developing techniques for novel dissolved organic analytes to expand our understanding of hydrothermal organic chemistry
As the Associate Professor in Aqueous Geochemistry, I'm a permanent faculty member here at the Department of Earth Science, University of Bergen since 2015, and also a long-term Guest Investigator at the Department of Marine Chemistry and Geochemistry at the Woods Hole Oceanographic Institution (WHOI).
From 2013-2015, I was a Postdoctoral Associate in the Earth, Atmospheric and Planetary Sciences (EAPS) Department at MIT, in the lab group of Prof. Shuhei Ono. Prior to that, I was a Postdoctoral Fellow at the MARUM Center for Marine Environmental Sciences (University of Bremen, 2010-2013) and an MIT/WHOI Joint Program graduate student at WHOI (Ph.D. 2010). I did my M.Sc. in Geochemistry at the University of Leeds (2004) and my B.Sc. in Geological Oceanography (2002) at the School of Ocean Sciences, Bangor University, U.K.
Links to expeditions I've sailed on:
2021 HACON2021 ◆ R/V Kronprins Haakon/ROV REV Ocean ◆ Aurora Vent Site, Gakkel Ridge
2020 AT42-22 ◆ R/V Atlantis/ROV Jason ◆ Mid-Cayman Rise (Von Damm, Piccard)
2019 HACON2019 ◆ R/V Kronprins Haakon/ROV NUI ◆ Aurora Vent Site, Gakkel Ridge
2019 GS19 ◆ R/V GO Sars/ROV Ægir ◆ AMOR: Fåvne, Loki's Castle sites
2018 GS18 ◆ R/V GO Sars/ROV Ægir ◆ AMOR: Seven Sisters, Jan Mayen, Ægir, Loki's Castle
2017 GS17 ◆ R/V GO Sars/ROV Ægir ◆ AMOR: Loki's Castle
2016 GS16B ◆ R/V GO Sars/ROV Ægir ◆ Arctic Mid-Ocean Ridge (AMOR): Jan Mayen, Ægir
2016 M126 ◆ R/V Meteor/ROV Quest 4000m ◆ Mid-Atlantic Ridge, 12-15°N
2013 FK008 ◆ R/V Falkor/HROV Nereus ◆ Mid-Cayman Rise
2012 AT18-16 ◆ R/V Atlantis/ROV Jason II ◆ Mid-Cayman Rise
2011 SO-216 ◆ R/V Sonne/ROV Quest 4000m ◆ Manus Basin
2010 M82/3 ◆ R/V Meteor/ROV Quest 4000m ◆ Menez Gwen
2008 AT15-38 ◆ R/V Atlantis/HOV Alvin ◆ Guaymas/EPR (9-10°N)
2008 KNOX18RR ◆ R/V R. Revelle/ROV Jason II ◆ Mid-Atlantic Ridge
2006 MGLN06MV ◆ R/V Melville/ROV Jason II ◆ Manus Basin
2005 TUIM05MV ◆ R/V Melville/ROV Jason II ◆ Lau Basin
Deep Carbon Observatory:
DCO News highlights the Geochemical Society's Elements magazine special issue on: Abiotic Hydrogen and Hydrocarbons in Planetary Lithospheres
Deep Carbon Observatory:
UiB Centre for Geobiology:
Methanethiol in the Media:
- (2022). Compositions of dissolved organic matter in the ice-covered waters above the Aurora hydrothermal vent system, Gakkel Ridge, Arctic Ocean. Biogeosciences. 2101-2120.
- (2020). Tailoring hydrothermal vent biodiversity towards improved biodiscovery using a novel in-situ enrichment strategy. Frontiers in Microbiology.
- (2020). Abiotic synthesis of methane and organic compounds in Earth’s lithosphere. Elements. 25-31.
- (2019). Geochemistry of Hot-Springs at the SuSu Knolls Hydrothermal Field, Eastern Manus Basin: Advanced Argillic Alteration and Vent Fluid Acidity. Geochimica et Cosmochimica Acta. 25-48.
- (2019). Application of B, Mg, Li, and Sr Isotopes in Acid‐Sulfate Vent Fluids and Volcanic Rocks as Tracers for Fluid‐Rock Interaction in Back‐Arc Hydrothermal Systems. Geochemistry Geophysics Geosystems. 1-18.
- (2018). The influence of magmatic fluids and phase separation on B systematics in submarine hydrothermal vent fluids from back-arc basins. Geochimica et Cosmochimica Acta. 140-162.
- (2018). Genome analysis of Vallitalea guaymasensis strain L81 isolated from a deep-sea hydrothermal vent system. Microorganisms.
- (2018). Clumped isotopologue constraints on the origin of methane at seafloor hot springs. Geochimica et Cosmochimica Acta. 141-158.
- (2016). Heterotrophic Proteobacteria in the vicinity of diffuse hydrothermal venting. Environmental Microbiology. 4348-4368.
- (2016). Arsenic bioaccumulation and biotransformation in deep-sea hydrothermal vent organisms from the PACMANUS hydrothermal field, Manus Basin, PNG. Deep Sea Research Part I: Oceanographic Research Papers. 95-106.
- (2021). Cu isotope variations in active hydrothermal chimneys along the ultra-slow spreading Arctic Mid Ocean Ridge.
- (2015). Temporal evolution of magmatic-hydrothermal systems in the Manus Basin, Papua New Guinea: Insights from vent fluid chemistry and bathymetric observations, Abstract OS42A-05 .
- (2015). Controls on the Formation and Composition of Seafloor Hot Springs: Implications for polymetallic sulfide deposits, extreme life, and astrobiology.
- (2019). Tracing Subsurface Iron Cycling in the Sediment-Influenced Loki’s Castle Hydrothermal Vent Field with Stable Fe Isotopes.
- (2019). Conductive Cooling and Microbial Carbon Transformations in Diffuse Hydrothermal Fluids at Loki’s Castle.
- (2016). New opportunities for mid-ocean ridge research in the Arctic.
- (2016). INVITED: Exploring organic diversity and origins in seafloor hot springs: a synthesis of recent discoveries.
- (2021). Iron Oxidizers and Sheath-forming Zetaproteobacteria in Biofilms of the Newly Discovered Fåvne Hydrothermal Vent Field.
- (2019). Identification of key-players in anaerobic alkane oxidation in the diffuse venting Barite Field at the Loki´s castle.
- (2019). Establishing Cu isotopes as a tracer for seafloor mineral deposit formation using hydrothermal experiments.
 Reeves, E.P. (2022) Timing Earth’s abiotic kitchen: short hydrothermal fluid residence times in serpentinizing oceanic crust. Journal of Geophysical Research: Oceans, 127, e2022JC018601. DOI: 10.1029/2022JC018601
 Sert, M.F., H. Niemann, E.P. Reeves, M.A. Granskog, K.P. Hand, T. Kekäläinen, J. Jänis, P.E. Rossel, B. Ferré, A. Silyakova, F. Gründger (2022) Compositions of dissolved organic matter in the ice-covered waters above the Aurora hydrothermal vent system, Gakkel Ridge, Arctic Ocean. Biogeosciences, 19, pp2101–2120. DOI: 10.5194/bg-2021-350
 Reeves, E.P. & J. Fiebig (2020) Abiotic synthesis of methane and organic compounds in Earth’s lithosphere. Elements, 16(1) pp25-31. DOI: 10.2138/gselements.16.1.25 (see issue: Abiotic hydrogen and hydrocarbons in planetary lithospheres. Editors: L. Truche, T. McCollom, I. Martinez)
 Stokke, R., E.P. Reeves, H. Dahle, A. Fedoy, T. Viflot, S. Onstad, F. Vulcano, R. Pedersen, V.G.H. Eijsink, I.H. Steen (2020) Tailoring hydrothermal vent biodiversity towards improved biodiscovery using a novel in-situ enrichment strategy. Frontiers in Microbiology, 11, 249. DOI: 10.3389/fmicb.2020.00249
 Wilckens, F., E.P. Reeves, W. Bach, J. Seewald, S.A. Kasemann (2019) Application of B, Mg, Li and Sr isotopes in acid‐sulfate vent fluids and volcanic rocks as tracers for fluid‐rock interaction in back‐arc hydrothermal systems. Geochemistry, Geophysics, Geosystems, 20. DOI: 10.1029/2019GC008694
 Seewald, J.S., E.P. Reeves, W. Bach, P.J. Saccocia, P.R. Craddock, E. Walsh, W.C. Shanks III, S.P. Sylva, T. Pichler, M. Rosner (2019) Geochemistry of Hot-Springs at the SuSu Knolls Hydrothermal Field, Eastern Manus Basin: Advanced Argillic Alteration and Vent Fluid Acidity. Geochimica et Cosmochimica Acta, 255, pp25-48. DOI: 10.1016/j.gca.2019.03.034
 Schouw, A., F. Vulcano, I. Roalkvam, W.P. Hocking, E. Reeves, R. Stokke, G. Bødtker, I.H. Steen (2018) Genome Analysis of Vallitalea guaymasensis Strain L81 Isolated from a Deep-Sea Hydrothermal Vent System. Microorganisms, 6(3), 63. DOI: 10.3390/microorganisms6030063
 Wilckens, F.K., E.P. Reeves, W. Bach, A. Meixner, J.S. Seewald, A. Koschinsky, S.A. Kasemann (2018) The influence of magmatic fluids and phase separation on B systematics in submarine hydrothermal vent fluids from back-arc basins. Geochimica et Cosmochimica Acta, 232, pp140–162. DOI: 10.1016/j.gca.2018.04.023
 Wang, D.T., E.P. Reeves, J.M. McDermott, J.S. Seewald, and S. Ono (2018) Clumped isotopologue constraints on the origin of methane at seafloor hot springs. Geochimica et Cosmochimica Acta, 223, pp141–158. DOI: 10.1016/j.gca.2017.11.030
 Bach, W. & E.P. Reeves (2016) Hydrothermal Vents. In: W.M. White (Ed.), Encyclopedia of Geochemistry: A Comprehensive Reference Source on the Chemistry of the Earth. Springer International. DOI: 10.1007/978-3-319-39193-9_110-1
 Price, R., C. Breuer, E.P. Reeves, W. Bach, T. Pichler (2016) Arsenic bioaccumulation and biotransformation in deep-sea hydrothermal vent organisms from the PACMANUS hydrothermal field, Manus Basin, PNG (cover article). Deep-Sea Research I: Oceanographic Research Papers, 117, pp95-106. DOI: 10.1016/j.dsr.2016.08.012
 Meier, D., W. Bach, P.R. Girguis, H. Gruber-Vodicka, E.P. Reeves, M. Richter, C. Vidoudez, R. Amann, A. Meyerdierks (2016) Heterotrophic Proteobacteria in the vicinity of diffuse hydrothermal venting. Environmental Microbiology, 18, pp4348-4368. DOI: 10.1111/1462-2920.13304
 Seewald, J.S., E.P. Reeves, W. Bach, P. Saccocia, P. Craddock, W.C. Shanks III, S. Sylva, T. Pichler, M. Rosner, E. Walsh (2015) Submarine venting of magmatic volatiles in the Eastern Manus Basin, Papua New Guinea, Geochimica et Cosmochimica Acta, 163, pp178–199. DOI: 10.1016/j.gca.2015.04.023
 Wang, D.T., D.S. Gruen, B. Sherwood Lollar, K.-U. Hinrichs, L.C. Stewart, J.F. Holden, A.N. Hristov, J.W. Pohlman, P.L. Morrill, M. Könneke, K.B. Delwiche, E.P. Reeves, C.N. Sutcliffe, D.J. Ritter, J.S. Seewald, J.C. McIntosh, H.F. Hemond, M.D. Kubo, D. Cardace, T.M. Hoehler, S. Ono (2015) Nonequilibrium clumped isotope signals in microbial methane. Science, 348(6233), pp428-431. DOI: 10.1126/science.aaa4326 (See Perspective by Passey)
 Reeves, E.P.‡, M. Yoshinaga‡, P. Pjevac‡, N. Goldenstein, J. Peplies, A. Meierdierks, R. Amann, W. Bach, K.-U. Hinrichs (2014) Microbial lipids reveal diverse carbon flow patterns on hydrothermal sulfide structures. Environmental Microbiology, 16(11), pp3515-3532. DOI: 10.1111/1462-2920.12525 (‡equal contribution)
 Reeves, E.P., J.M. McDermott, J.S. Seewald (2014) The origin of methanethiol in midocean ridge hydrothermal fluids. Proceedings of the National Academy of Sciences, 111(15), pp5474–5479. DOI: 10.1073/pnas.1400643111
 Lang, S.Q., G.L. Früh-Green, D.S. Kelley, M.D. Lilley, G. Proskurowski, E.P. Reeves (2012) Online Letter: H2/CH4 ratios cannot reliably distinguish abiotic vs. biotic methane in natural hydrothermal systems. Proceedings of the National Academy of Sciences, 109(47), E3210. DOI: 10.1073/pnas.121313810
 Pester, N.J., E.P. Reeves, M.E. Rough, K. Ding, J.S. Seewald, W.E. Seyfried Jr. (2012) Subseafloor phase equilibria in high-temperature hydrothermal fluids of the Lucky Strike Seamount (Mid-Atlantic Ridge, 37°17'N). Geochimica et Cosmochimica Acta, 90, pp303–322. DOI: 10.1016/j.gca.2012.05.018
 Reeves, E.P., J.S. Seewald, S. Sylva (2012) Hydrogen isotope exchange between n-alkanes and water under hydrothermal conditions. Geochimica et Cosmochimica Acta, 77, pp582–599. DOI: 10.1016/j.gca.2011.10.008
 Reeves, E.P., J.S. Seewald, P. Saccocia, W. Bach, P.R. Craddock, W.C. Shanks, S.P. Sylva, E. Walsh, T. Pichler, M. Rosner (2011) Geochemistry of hydrothermal fluids from the PACMANUS, Northeast Pual and Vienna Woods hydrothermal fields, Manus Basin, Papua New Guinea. Geochimica et Cosmochimica Acta, 75, pp1088–1123. DOI: 10.1016/j.gca.2010.11.008
 Newton, R.J., E.P. Reeves, N. Kafousia, P.B. Wignall, S.H. Bottrell, J.G. Sha (2011) Low marine sulfate concentrations and the isolation of the European epicontinental sea during the Early Jurassic. Geology, 39, pp7–10. DOI: 10.1130/G31326.1
 Mottl, M.J., J.S. Seewald, C.G. Wheat, M.K. Tivey, P.J. Michael, G. Proskurowski, T.M. McCollom, E. Reeves, J. Sharkey, C.F. You, L.H. Chan, T. Pichler (2011) Chemistry of hot springs along the Eastern Lau Spreading Center. Geochimica et Cosmochimica Acta, 75, pp1013–1038. DOI: 10.1016/j.gca.2010.12.008
 Craddock, P.R., W. Bach, J.S. Seewald, O.J. Rouxel, E. Reeves, M.K. Tivey (2010) Rare earth element abundances in hydrothermal fluids from the Manus Basin, Papua New Guinea: Indicators of sub-seafloor hydrothermal processes in back-arc basins. Geochimica et Cosmochimica Acta, 74, pp5494–5513. DOI: 10.1016/j.gca.2010.07.003
 Wignall, P.B., A. Hallam, R.J. Newton, J.G. Sha, E. Reeves, E. Mattioli, S. Crowley (2006) An eastern Tethyan (Tibetan) record of the Early Jurassic (Toarcian) mass extinction event. Geobiology, 4, pp179–190. DOI: 10.1111/j.1472-4669.2006.00081.x
AS PRINCIPAL INVESTIGATOR:
Research Council of Norway, FRINATEK Researcher Project HyPOD (10.2 MNOK)
AS PROJECT PARTNER / Co-PI / COLLABORATOR:
- 2021-2024 (Partner)
Research Council of Norway, MARINFORSK Researcher Project DeepSeaQuence
(PI: R. Stokke)
- 2020-2024 (Co-PI)
PI: A. Gartman (USGS)
- 2019-2022 (International Collaborator)
U.S. National Science Foundation (OCE-MG&G) Cayman2020
- 2018-2022 (Partner)
Research Council of Norway, FRINATEK Researcher Project HACON
- 2017-2021 (Work Package Leader)
CURRENT GROUP MEMBERS:
- Samuel Pereira (Ph.D., 2020-2023): The high-temperature fate of the hydrothermal deep biosphere (NFR FRINATEK HyPOD)
- Thomas Ø. Viflot (Ph.D., 2019-2023): Experimental investigations of diverse organic production pathways in hydrothermal systems (NFR FRINATEK HyPOD)
- Chanakan Boonnawa (Ph.D., 2021-2024): Experimental investigations of hydrothermal abiotic organic carbon production in the absence of minerals (graduate fellowship, Thai Ministry of Science & Technology)
- Thilde Voje (M.Sc., 2022-2023): Fluorinating the oceanic crust: probing the cryptic Fluoride sink in seafloor hydrothermal systems
- Ph.D. Apolline Samin (UiB, 2020-2023): Investigating Cu isotope fractionation as a tracer for seafloor mineral deposit formation (with Desiree Roerdink)
- Ph.D. Francesca Vulcano (UiB, 2018-2022): Anaerobic alkane oxidation at the Loki's Castle Barite Field: microbial physiology at the foundation of hydrocarbon cycling (with Ida H. Steen)
- M.Sc. Stian Torset (BIO UiB, 2019-2021)
- M.Sc. Lotte Johannessen (UiB, 2020-2022)
- M.Sc. Johannes Scheffler (Uni. Leipzig, 2019-2020)
- M.Sc. Rasmus Rikter-Svendsen (UiB, 2019-2021): Distribution of thermochemical output and associated ecosystems at the Loki's Castle Hydrothermal Field (with Thibaut Barreyre)
- M.Sc. Ingvild Aarrestad (UiB, 2018-2020): Tracing contamination from historical mining sites in Norway with Cu isotopes (with Desiree Roerdink)
- Chanakan Boonnawa (M.Sc. UiB, 2019-2021): Geochemistry of novel vent fluids from the newly discovered 72.7°N (Fåvne) hydrothermal system on the Arctic Mid-Ocean Ridge
- Thomas Ø. Viflot (M.Sc. UiB, 2017-2019): Geochemistry and geobiology of low-temperature fluid formation in Arctic Mid-Ocean Ridge hydrothermal systems (see talk at Goldschmidt 2019, Barcelona)
- Johannes Scheffler (Erasmus+ Intern, 2018-2019, M.Sc. Uni. Leipzig): Trace metal abundances in back-arc, Atlantic and Arctic mid-ocean ridge hydrothermal fluids / GS19 cruise
- Eva-Maria Meckel (Erasmus+ Intern, 2019, M.Sc. Uni. Oldenburg): Quantification of methanol in hydrothermal fluid matrices / GS19, HACON cruises
LABORATORY FACILITIES & INSTRUMENTATION
My research group and I operate and maintain a wide array of organic and inorganic analytical methods (packed and capillary column gas chromatography, GC-mass spectrometry, ion chromatography, ion-selective electrodes) in the UiB BioGeochemistry Laboratory (which I lead) in addition to analytical and precision balances (Mettler Toledo). Many of my inorganic elemental methods (major, minor, trace elements) also frequently utilize the ICP-OES (Thermo iCAP series) and ICP-MS (Thermo Element series) instruments of the Bergen Geoanalytical Facility.
I also operate and maintain four WHOI-style Isobaric Gas-Tight hydrothermal fluid samplers as part of the Centre for Deep Sea Research, and have constructed three custom-built Dickson-type flexible-cell high temperature-pressure reactors (operating to ca. 350°C, 350 bar) for hydrothermal fluid-rock experimentation.
Please email me for further information about analyses, experimentation, hydrothermal fluid sampling and collaboration. The following is an overview of current operational chromatography instrumentation in my lab -
- Purge-and-trap gas chromatography/mass spectrometry (P&T-GC/MS-FID):
Installed 2017, a capillary GC/FID-MS (Agilent 7890B GC-FID / 5977B Series MSD) with 7693A Automatic Liquid Sampler (solvent-based samples), Cool On-Column (COC) and Multimode (MMI) Inlets. In addition to injection of solvent-based liquid samples, this instrument is also configured with a Teledyne Tekmar Lumin Purge-and-Trap Concentrator and AQUATek 100 Autosampler for Volatile Organic Analysis (VOA), e.g. alcohols, in large volume (mL) aqueous samples.
- Purge-and-trap gas chromatography with S-specific detection (P&T-GC-TCD-FID/SCD):
Installed 2017, an Agilent 7890A packed column GC with a TCD-FID and tandem-style Agilent 8355 Sulfur Chemiluminescence Detector. This instrument is configured for Purged Packed Inlet (PPI) direct injection of headspace gas samples, or manual Purge-and-Trap injection of sparged aqueous samples, containing ΣCO2, ΣH2S, C1 to C6 hydrocarbons, alkyl-thiols (cf. Reeves et al. 2012).
- Molecular sieve gas chromatography (TCD-FID, HID)
An SRI 8610C gas chromatograph configured with packed and wide-bore capillary molecular sieve columns, using TCD-FID or HID detection. This GC is configured for headspace gas injections of major or trace CH4, H2 and CO (cf. Reeves et al. 2011).
- Advanced Ion Chromatography (HPIC with CD and ED)
Installed 2020, a Dionex ICS-5000+ Dual Channel Capillary "reagent-free" HPIC System; one channel is dedicated to high precision trace anion (Cl-, SO42-, Br-, F-, NO3-, NO2-, PO43-, low-molecular weight carboxylic acids (formate to caproate)), or alternately, trace cation (Na+, K+, Mg2+, Ca2+, Li+, Sr2+, NH4+) concentration analysis with suppressed conductivity detection (CD), and the other channel to quantification of aqueous reduced organic compounds, such as amino acids, with electrochemical detection (ED).