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Dr. Charlotte Kleint


Petrology of the Ocean Crust


+49 421 218-65405


+49 421 218-65429



GEO 5320

External Profiles: 

Charlotte Kleint

* currently on maternity/ parental leave *

Research Interests

  • Geochemical fluid composition of shallow and deep-sea hydrothermal vent systems
  • Stabilization and transport of hydrothermally derived metals in the water column
  • Trace metal fluxes in the ocean
  • Organic and inorganic complexation of trace metals
  • Trace metal analytics
  • Deep-sea mineral resources
  • Research coordination

Cur­riculum Vitae

since 2021

Senior Scientist (tenured), MARUM, University of Bremen

2021/2022 and 2024/2025

1 year parental leave each


PostDoc, Jacobs University Bremen and MARUM, University of Bremen


Research Stay, University of Otago, New Zealand (3 months)

2013-2016 PhD student, Jacobs University Bremen


Trainee, Jacobs University Bremen

2009-2011 MSc Marine Geosciences, University of Bremen

BSc Geoscience, University of Hannover

Research Cruises and Sampling Campaigns


RV METEOR M192/2 "BRIDGEHELL" Piräus (Greece) - Limassol (Cyprus)

"Bridging hydrothermal sites along the Hellenic Arc off Milos from shallow to deep”


RV SONNE SO263TONGARIFT" Suva (Fiji) - Suva (Fiji)

"Magmatic evolution of island arcs and backarc crust and implications for hydrothermal venting: the rifted North Tonga Arc”


RV SONNE SO253HYDROTHERMADECNouméa (New Caledonia) - Auckland (New Zealand)

„Geochemical and ecological impacts of hydrothermal processes at intraoceanic volcanic island arcs using the example of the Kermadec Island Arc (SW Pacific)”


RV SONNE SO240 „FLUM“ Manzanillo (Mexico) - Manzanillo (Mexico)

„Occurrence of fluid circulation at seamounts, impact on biogeochemical processes, and its potential influence on the occurrence and composition of manganese nodules"


RV SONNE SO229 „COVOLVE“ Townsville (Australia) - Nouméa (New Caledonia)

„Volcanism, hydrothermal activity and vent biology in the Coriolis Troughs, New Hebrides Island Arc”


Dominica, Lesser Antilles, Caribbean

Sampling of shallow marine hydrothermal vents


Milos, Greece

Sampling of shallow marine hydrothermal vents

Publications (peer review)

2024 Bohrmann, G., Streuff, K., Römer, M., Knutsen, S.M., Smrzka, D., Kleint, J., Röhler, A., Pape, T., Sandsta, N.R., Kleint, C., Hansen, C., dos Santos Ferreira, C., Walter, M., de Paula Santos, G.M. and Bach, W.: Discovery of the first hydrothermal field along the 500‑km‑long Knipovich Ridge offshore Svalbard (the Jøtul field). Scientific Reports 14, 10168. doi: 10.1038/s41598-024-60802-3
2023 Janssen, D., Gilliard, D., Rickli, J., Nasemann, P., Koschinsky, A., Hassler, C.S., Bowie, A.R., Ellwood, M.J., Kleint, C. and Jaccard, S.L.: Chromium stable isotope distributions in the southwest Pacific Ocean and constraints on hydrothermal input from the Kermadec Arc. Geochimica et Cosmochimica Acta 342, 31-44. doi: 10.1016/j.gca.2022.12.010
2022 Hansen, C., Kleint, C., Böhnke, S., Klose, L., Adam-Beyer, N., Sass., K., Zitoun, R., Sander, S.G., Indenbirken, D., Dittmar, T., Koschinsky, A. and Perner, M.: Impact of variable Fe-concentrations on dissolved organics and microbal community structure in hydrothemal plumes: an experimental study. Scientific Reports 12, 20723. doi: 10.1038/s41598-022-25320-0
Klose, L., Kleint, C., Bach, W., Diehl, A., Wilckens, F., Peters, C., Strauss, H., Haase, K. and Koschinsky, A.: Hydrothermal activity and associated subsurface processes at Niuatahi rear-arc volcano, North East Lau Basin, SW Pacific: Implications from trace elements and stable isotope systematics in vent fluids. Geochimica et Cosmochimica Acta 332, 103-123. doi: 10.1016/j.gca.2022.06.023
Dede, B., Hansen, C.T., Neuholz, R., Schnetger, B., Kleint, C., Walker, S., Bach, W., Amann, R. and Meyerdierks, A.: Niche differentiation of sulfur-oxidizing bacteria (SUP05) in submarine hydrothermal plumes. The ISME Journal 16, 1479–1490. doi: 10.1038/s41396-022-01195-x
Kleint, C., Zitoun, R., Neuholz, R., Walter, M., Schnetger, B., Klose, L., Chiswell, S.M., Middag, R., Laan, P., Sander, S.G. and Koschinsky, A.: Trace metal dynamics in shallow hydrothermal plumes at the Kermadec arc. Frontiers in Marine Science 8, 782734. doi: 10.3389/fmars.2021.782734
2021 Klose, L., Keith, M., Hafermaas, D., Kleint, C., Bach, W., Diehl, A., Wilckens, F., Peters, C., Strauss, H., Klemd, R., van Geldern, R., Haase, K. and Koschinksy, A.: Trace element and isotope systematics in vent fluids and sulphides from Maka volcano, North Eastern Lau Spreading Centre: Insights into three-component fluid mixing. Frontiers in Earth Science 9, 776925. doi: 10.3389/feart.2021.776925
Peters, C., Strauss, K., Haase, K., Bach, W., de Ronde, C., Kleint, C., Stucker, V. and Diehl, A.: Hydrothermal sulfur cycling: insights from multiple sulfur isotopes for hydrothermal fluids from the Tonga-Kermadec intraoceanic arc and the NE Lau Basin. Chemical Geology 586. doi: 10.1016/j.chemgeo.2021.120586
2020 Neuholz, R., Kleint, C., Schnetger, B., Koschinsky, A., Laan, P., Middag, R., Sander, S.G., Thal, J., Türke, A., Walter, M., Zitoun, R. and Brumsack, H.J.: Submarine Hydrothermal Discharge and Fluxes of Dissolved Fe and Mn, and He Isotopes at Brothers Volcano Based on Radium Isotopes. Minerals 10 (11), doi: 10.3390/min10110969
Neuholz, R., Schnetger, B., Kleint, C., Koschinsky, A., Lettmann, K., Sander, S.G., Türke, A., Walter, M., Zitoun, R. and Brumsack, H.J.: Near-field hydrothermal plume dynamics at Brothers Volcano (Kermadec Arc): A short-lived radium isotope study. Chemical Geology 533. doi:10.1016/j.chemgeo.2019.119379
2019 Kleint, C., Bach, W., Diehl, A., Fröhberg, N., Garbe-Schönberg, D., Hartmann, J.F., de Ronde, C.E.J., Sander, S.G., Strauss, H., Stucker, V., Thal, J., Zitoun, R. and Koschinsky, A.: Geochemical characterization of highly diverse hydrothermal fluids from volcanic vent systems of the Kermadec intraoceanic arc, Chemical Geology 528. doi: 10.1016/j.chemgeo.2019.119289
Böhnke, S., Sass, K., Gonnella, G., Diehl, A., Kleint, C., Bach, W., Zitoun, R., Koschinsky, A., Indenbirken, D., Sander, S.G., Kurtz, S. and Perner, M.: Parameters governing the community structure and element turnover in Kermadec volcanic ash and hydrothermal fluids as monitored by inorganic electron donor consumption, autotrophic CO2 fixation and 16S tags of the transcriptome in incubation experiments, Frontiers in Microbiology. doi:10.3389/fmicb.2019.02296

Kleint C., Pichler T. and Koschinsky A.: Geochemical characteristics, speciation and size-fractionation of iron (Fe) in two marine shallow-water hydrothermal systems, Dominica, Lesser Antilles. Chemical Geology 454. pp 44-53.doi: 10.1016/j.chemgeo.2017.02.02

2016 Kleint C., Hawkes J. A., Sander S. G. and Koschinsky A.:Voltammetric Investigation of Hydrothermal Iron Speciation. Frontiers in Marine Science (Marine Biogeochemistry) 3:75 Open Access, doi: 10.3389/fmars.2016.00075

Kleint C., Kuzmanovski S., Powell Z., Bühring S. I., Sander S. G. and Koschinsky A.: Organic Cu-complexation at the shallow marine hydrothermal vent fields off the coast of Milos (Greece), Dominica (Lesser Antilles) and the Bay of Plenty (New Zealand). Marine Chemistry 173. pp 244-252. doi: 10.1016/j.marchem.2014.10.012

2014 Mohwinkel D., Kleint C. and Koschinsky A.: Phase associations and potential selective extraction methods for selected high-tech metals from ferromanganese nodules and crusts with siderophores. Applied Geochemistry 43. pp 13-21. doi: 10.1016/j.apgeochem.2014.01.01


  • Ocean Floor Symposium 2022 Bremen
  • Goldschmidt Conference 2019 Barcelona, 2017 Paris
  • Gordon Research Conference 2018, Hong Kong (invited)
  • Ocean Sciences Meeting 2016 New Orleans, 2014 Hawaii
  • ASLO 2013 New Orleans
  • GeoFrankfurt 2014, GeoHannover 2012, EMC 2012 Frankfurt


Member KDM - Strategy Group: Mineral Resources

Member Center Council MARUM

Reviewer for

  • DFG
  • Scientific Reports, Earth and Planetary Science Letters, Marine Chemistry, Economic Geology, G-cubed, Environmental Chemistry, Geofluids


  • Marine Resources in Space and Time (MSc Marine Geosciences)
  • Übungen zur Allgemeinen Chemie für Geowissenschaftler (BSc Geowissenschaften)
  • Applied Geochemistry, Environmental Geochemistry, Introduction into EES, Geochemistry of Aqueous Systems (BSc Earth and Environmental Sciences (EES), Jacobs University Bremen, 2019-2021)