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Welcome, visitors!

I lead the within the and am a Theme leader () within the (successor to the ). My group and I conduct research on a variety of hydrothermal and inorganic-organic geochemistry 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, especially the Arctic region
• 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

Since 2023, I am a collaborating member of the (SapienCE Centre of Excellence), together with Postdoctoral Fellow Samuel Pereira in my group, applying organic geochemical (GC-MS) biomarker techniques in our laboratory to aid SapienCE in understanding South African paleoenvironmental change. I also now collaborate with the (Dept. of Mathematics, ���ϳԹ���Դ) on experimental hydrothermal geochemistry.

Current Lab Members:

• Samuel I. Pereira (Postdoctoral Fellow)
• Thilde Voje (Ph.D. Candidate)
• Chanakan Boonnawa (Ph.D. Candidate)
• Thomas Ø. Viflot (recent Ph.D. graduate)
• Zander St. John Warrington (M.Sc. Candidate)
• Current co-supervised students: 
  • Emily Denny (Ph.D. Candidate, )
  • Yuhe Zhang (Ph.D. Candidate, )

Short Biography:

As Professor of Aqueous Geochemistry, I've been a permanent faculty member here at the , since 2015, and also a long-term at the Department of Marine Chemistry and Geochemistry at the .

From 2013-2015, I was a Postdoctoral Associate in the at MIT, in the lab group of . Prior to that, I was a Postdoctoral Fellow at the (, 2010-2013) and an graduate student at WHOI (Ph.D. 2010). I did my M.Sc. in Geochemistry at the (2004) and my B.Sc. in Geological Oceanography (2002) at the , Bangor University, U.K.

Links to expeditions I've sailed on:

2023 GS23 ◆ R/V GO Sars/ROV Ægir ◆ AMOR: Mohns & Knipovich Ridges

2022 GS22 ◆ R/V GO Sars/ROV Ægir ◆ AMOR: Fåvne, Ægir, Mohn's Treasure sites

2021 ◆ R/V Kronprins Haakon/ROV REV Ocean ◆ Aurora Vent Site, Gakkel Ridge

2020 ◆ R/V Atlantis/ROV Jason ◆ Mid-Cayman Rise (Von Damm, Piccard)

2019 ◆ 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

2019 ◆ R/V Atlantis/HOV Alvin ◆ East Pacific Rise, Hot2Cold Vents (-funded)

2018 GS18 ◆ R/V GO Sars/ROV Ægir ◆ AMOR: Seven Sisters, Jan Mayen, Ægir, Loki's Castle

2017 ◆ R/V GO Sars/ROV Ægir ◆ AMOR: Loki's Castle

2016 ◆ R/V GO Sars/ROV Ægir ◆ Arctic Mid-Ocean Ridge (AMOR): Jan Mayen, Ægir

2016 ◆ R/V Meteor/ROV Quest 4000m ◆ Mid-Atlantic Ridge, 12-15°N

2013 ◆ R/V Falkor/HROV Nereus ◆ Mid-Cayman Rise

2012 ◆ R/V Atlantis/ROV Jason II ◆ Mid-Cayman Rise

2011 ◆ R/V Sonne/ROV Quest 4000m ◆ Manus Basin

2010 ◆ R/V Meteor/ROV Quest 4000m ◆ Menez Gwen

2008 ◆ R/V Atlantis/HOV Alvin ◆ Guaymas/EPR (9-10°N)

2008 ◆ R/V R. Revelle/ROV Jason II ◆ Mid-Atlantic Ridge

2006 ◆ R/V Melville/ROV Jason II ◆ Manus Basin

2005 ◆ R/V Melville/ROV Jason II ◆ Lau Basin

• 2026

panel event:

Bergen One Ocean Week

University of Bergen-Chr.Michelsen Institute (CMI) Bergen Global Initiative panel:

: Turn of the Tide event - The Arctic Deep Sea: Knowledge, Gaps and Next Steps ()

• 2025

First detailed survey of the geochemistry of the Aurora Hydrothermal Vents () featured in ���ϳԹ���Դ News (English • Norsk) and

evening at Statsraaden Bar & Reception, Bergen ()

U.K. NERC-funded project HYDROMOX we are partnering on the Santorini volcano on is

event sponsored by the

• 2024

Comment in Zócalo Public Square (Arizona State University Media):

()

() shows inactive hydrothermal vents are not so ‘dead’ after all • •

Collaborator and featured in on Norway's deep-sea mining ambitions

, and win the for their

• 2023

MSc student and featured in (2023 cruise)

NFR 2021 expedition vent sampling featured in National Geographic

(led by ) is published in Norwegian popular science magazine, Naturen - special issue on

wins

• 2022

NFR Project 2019 exploration of the first Arctic vent site, Aurora, is published in &�Բ�����;• •

Featured in •

• 2021

NFR Project 2021 return expedition succeeds in the Arctic: • •

NFR Project students Thomas & Samuel writing about the hunt for life's hydrothermal origins in the national newspaper

• 2020

Deep Carbon Observatory:

the Geochemical Society's Elements magazine special issue on

• 2019

NFR Project 2019 expedition featured in

Expedition Vents Blog:

• 2018

Deep Carbon Observatory:

()

• 2017

• 2015

���ϳԹ���Դ Centre for Geobiology:

• 2014

Methanethiol in the Media:

Autumn Semester:

(course lead, sole lecturer)

Spring Semester:

GEOV109 Introduction to Geochemistry (course lead, team taught)

I also contribute to the following courses:

PEER-REVIEWED PUBLICATIONS (✣ Supervised student ; * Student-lead ; ✮ Review/Commentary)

[42] Denny, E.O.✣, P. ��������DZ�š���, S.I. Pereira✣, C. Argentino, G. Panieri, A. Mall, F. Vulcano✣, R. Stokke, E.P. Reeves, I.H. Steen, H. Dahle (in review) Aurora vent field is a hotspot for microbial hydrogen oxidation in the Arctic Ocean. bioRxiv preprint available at DOI:

[41] *Lapointe, C., J.W. Jamieson, E.P. Reeves, S.I. Pereira✣, H. Corlett, S. Bünz, E. Ramirez-Llodra (2025) The ice-covered Aurora hydrothermal vent field, Gakkel Ridge, Arctic Ocean: ultramafic-influenced venting at a mafic axial volcano on Earth’s slowest spreading center. Earth and Planetery Science Letters. 672, 119696. DOI:

[40] Gray, R., M. Russell, E.P. Reeves (2025) Inflection and Innuendo: Using the Writerly Framework to Achieve Deep Learning and Scientific Intuition. Innovative Higher Education. 50(5). DOI:

[39] Pereira, S.I.✣, B. Emilsson, E.P. Reeves (2025) Trace analysis of volatile fatty acids in marine waters using modern high‐pressure ion chromatography. Limnology and Oceanography: Methods. 23(6), pp389-412. DOI:

[38] *Dede, B., E.P. Reeves, M. Walter, W. Bach, R. Amann, A. Meyerdierks (2024) Bacterial chemolithoautotrophy in ultramafic plumes along the Mid-Atlantic Ridge. The ISME Journal. 18(1), wrae165. DOI:

[37] Reeves, E.P. & J.S. Seewald (2024) Hydrothermal carbon reduction in the absence of minerals. Geochimica et Cosmochimica Acta, 381, pp60-74. DOI:

[36] *Gini, C., J.W. Jamieson, E.P. Reeves, A. Gartman, T. Barreyre, M.G. Babechuk, S.L. Jørgensen, K. Robert (2024) Iron oxyhydroxide‐rich hydrothermal deposits at the high-temperature Fåvne vent field, Mohns Ridge. Geochemistry, Geophysics, Geosystems, 25, e2024GC011481. DOI:

[35] Gartman, A., D. Payan, M. Au, E.P. Reeves, J.W. Jamieson, C. Gini, D. Roerdink (2024) Hydrothermal plume fallout, mass wasting, and volcanic eruptions contribute to sediments at Loki's Castle Vent Field, Mohns Ridge. Geochemistry, Geophysics, Geosystems, 25, e2023GC011094. DOI:

[34] Samin, A.✣, D.L. Roerdink, E.P. Reeves, J. Scheffler✣, W. Bach, A. Beinlich, J.W. Jamieson, O. Rouxel (2024) Preservation of hydrothermal fluid copper isotope signatures in chalcopyrite‐rich chimneys: a case study from the PACMANUS vent field, Manus Basin. Geochemistry, Geophysics, Geosystems, 25, e2023GC011349. DOI:

[33] Achberger, A.M., R. Jones, J. Jamieson, C.P. Holmes II, F. Schubotz, N.R. Meyer, A.E. Dekas, S.M. Moriarty, E.P. Reeves, A. Manthey, J. Brünjes, D.J. Fornari, M.K Tivey, B.M Toner & J.B Sylvan (2024) Inactive hydrothermal vent microbial communities are important contributors to deep ocean primary productivity. Nature Microbiology, 9, pp657–668. DOI:

[32] Roerdink, D.L., F. Vulcano✣, J.K. Landro, K. Moltubakk, H.R. Babel, S.L. Jørgensen, T. Baumberger, I.E. Økland, E.P. Reeves, I.H. Thorseth, L.J. Reigstad, H. Strauss, I.H. Steen (2024) Hydrothermal activity fuels microbial sulfate reduction in deep and distal marine settings along the Arctic Mid Ocean Ridges. Frontiers in Marine Science, 10, 1320655. DOI:

[31] Seewald, J.S., C.G. Wheat, E.P. Reeves, M.K. Tivey, S.M. Sievert, D. Stakes, S.P. Sylva, M.D. Lilley, V.B. Heuer (2024) Spatial evolution and temporal stability of hydrothermal processes at sediment-covered spreading centers: constraints from Guaymas Basin, Gulf of California. Geochimica et Cosmochimica Acta, 367, pp87-106  DOI:  

[30] *��������DZ�š���, P., E. Denny✣, H. Dahle, A. Mall, T.Ø. Viflot✣, C. Boonnawa✣, E.P. Reeves, I.H. Steen, R. Stokke (2023) Putative novel hydrogen- and iron-oxidizing sheath-producing Zetaproteobacteria thrive at the Fåvne deep-sea hydrothermal vent field. mSystems, e00543-23. DOI:

[29] *Hughes, E.R., A.R. Waldeck, S.N. Moriarty, J.W. Jamieson, A.J. Martin, P.P. Scheuermann, D.D. Syverson, W.E. Seyfried Jr., E.P. Reeves, D.T. Johnston (2023) The influence of submarine hydrothermal systems on seawater sulfate. Geochimica et Cosmochimica Acta, 344, pp73-89. DOI:

[28] Ramirez-Llodra, E., C. Argentino, M. Baker, A. Boetius, C. Costa, H. Dahle, E. Denny✣, P.-A. Dessandier, M.H. Eilertsen, B. Ferre, C.R. German, K. Hand, A. Hilário, L. Hislop, J.W. Jamieson, D. Kalnitchenko, A. Mall, G. Panieri, A. Purser, S.P. Ramalho, E.P. Reeves, L. Rolley, S.I. Pereira✣, P.A. Ribeiro, M.F. Sert, I.H. Steen, M. Stetzler, R. Stokke, L. Victorero, F. Vulcano✣, S. Vågenes, K.A. Waghorn, S. Buenz (2023) Hot vents beneath an icy ocean: The Aurora Vent Field, Gakkel Ridge, revealed. Oceanography, 36(1), pp6-17. DOI: ()

[27] German, C.R., E.P. Reeves, A. Türke, A. Diehl, E. Albers, W. Bach, A. Purser, S.P. Ramalho, S. Suman, S. Mertens, M. Walter, E. Ramirez-Llodra, V. Schlindwein, S. Bünz, A. Boetius (2022) Volcanically hosted venting with indications of ultramafic influence at Aurora hydrothermal field on Gakkel Ridge. Nature Communications, 13, 6517. DOI: 

[26] Vulcano, F.✣, C.J. Hahn, D. Roerdink, H. Dahle, E.P. Reeves, G. Wegener, I.H. Steen, R. Stokke (2022) Phylogenetically and functionally diverse ANME-1 thrive in Arctic hydrothermal vents. FEMS Microbiology Ecology, DOI: 

[25] *Wang, D.T., J.S. Seewald, E.P. Reeves, S. Ono, S.P. Sylva (2022) Incorporation of water-derived hydrogen into methane during artificial maturation of source rock under hydrothermal conditions. Organic Geochemistry, 171, 104468. DOI:

✮[24] 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:

[23] *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:

✮[22] Reeves, E.P. & J. Fiebig (2020) Abiotic synthesis of methane and organic compounds in Earth’s lithosphere. Elements, 16(1) pp25-31. DOI:  (see issue: . Editors: L. Truche, T. McCollom, I. Martinez) 

[21] 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:

[20] *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:

[19] 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:

[18] *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:

[17] *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:

[16] *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:

✮[15�� 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:

[14] 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:

[13] *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:

[12] 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:

[11] *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: (See Perspective by )

[10] 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: (‡equal contribution)

[9] 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:

✮[8�� 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:

[7] *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:

[6] 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:

[5] 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:

[4] 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:

[3] 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:

[2] *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:

[1] 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:

AS PRINCIPAL INVESTIGATOR:

• 2024

Hanse-Wissenschaftskolleg (HWK) Fellowship

Partners: (Uni. Bremen), (Uni. Oldenburg)

• 2019-2024

Research Council of Norway, Researcher Project (10.2 MNOK)

HyPOD:

Partners: (���ϳԹ���Դ), (Uni. Oldenburg), (Uni. Bremen)

➤ Project publications: &�Բ�����;• • • • •

AS PROJECT PARTNER / Co-PI / COLLABORATOR:

• 2026-2029 (Partner)

Research Council of Norway, Researcher Project

GeoLit: Geothermal Energy and Lithium Co-production: Multiphysics Modelling, Experimentation and
Simulation

PI: I. Berre (���ϳԹ���Դ Mathematics)

• 2025-2028 (Partner)

Researcher Project

GeoMin: Geothermal energy and mineral co-production: modelling, lab experiments and simulation

PI: I. Berre (���ϳԹ���Դ Mathematics)

• 2025-2028 (Partner)

Research Council of Norway, Researcher Project for Early Career 

WormFest:

PI: M.H. Eilertsen (���ϳԹ���Դ BIO)

• 2025-2028 (Partner)

U.K. Natural Environment Research Council (NERC) project 

HYDROMOX:

PI: (NOC Southampton)

• 2021-2024 (Partner)

Research Council of Norway, Researcher Project

DeepSeaQuence:

PI: (���ϳԹ���Դ)

➤ Project publications:  

• 2020-2024 (Co-PI)

U.S. /

PI: (USGS)

• 2019-2022 (International Collaborator)

U.S. (OCE-MG&G) Cayman2020

PIs: (Uni. S.Carolina), (WHOI), (Uni. Colorado)

• 2018-2022 (Partner)

Research Council of Norway, Researcher Project

HACON:

PI: (NIVA). Other ���ϳԹ���Դ team members: , ,

➤ Project publications: &�Բ�����;• &�Բ�����;• &�Բ�����;• •

• 2017-2021 (Work Package Leader)

,

➤ Project publications: &�Բ�����;• &�Բ�����;• • • • • • •