Prof. Dr. Barbara I. Kleine Marshall
Prof. Dr. Barbara Kleine-Marshall
GeoZentrum Nordbayern
Professor of Geochemistry
91054 Erlangen
- Phone number: +49 9131 85-22699
- Email: barbara.kleine-marshall@fau.de
My research focuses on fluid movement and fluid-rock interaction processes in orogenic belts (e.g., Scotland), subduction zones (e.g., Cyclades in Greece) and rift systems (e.g., Iceland, East African rift). State-of-the-art analytical techniques (LA-ICP-MS, ICP-OES, IC, high TC/EA, IRMS, SIMS) are applied to detect chemical and isotope variations in rocks, minerals and fluids from active on-land and submerged hydrothermal systems or along former fluid pathways in metamorphic rocks. Comparing the obtained petrological and geochemical data with results from thermodynamic reaction path modelling using software programs like PhreeqC or GEMS aids to unravel the origin of fluids, processes that lead to (re-)mobilization of elements in the crust and estimate global chemical fluxes.
Particularly the role of sulphur (S) as powerful ligand to form stable metal-ligand complexes with a variety of different (critical) metals in crustal fluids may affect many global (natural and anthropogenic) element cycles in the crust. Sulphur isotope systematics of minerals and bulk rock coupled to their variations in metal and trace element concentrations are valuable tracers to help detect the origin of S in the system and investigate the formation mechanism (e.g., phase separation, fluid mixing, redox reactions) that cause sulphidation and accompanied metal enrichment of the crust.
| Jun 2023 – present |
Professor at the GeoZentrum at Friedrich-Alexander-Universität Erlangen-Nuremberg
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| Sept 2021 – Apr 2023 |
Adjunct and research associate at the Institute of Earth Sciences at University of Iceland
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| Sept 2019 – Aug 2021 |
Postdoctoral research fellow at the Institute of Earth Sciences at University of Iceland
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| Nov 2017 – Aug 2019 | Postdoc am Nordic Volcanological Centre (NordVulk) in Reykjavík |
| Nov 2010 – Jun 2015 |
Ph.D. candidate in Geology at the Department of Geological Sciences at Stockholm University
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| Sep 2009 – Oct 2010 |
Master in Geology at the Department of Geological Sciences at Stockholm University
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| Oct 2006 – Aug 2009 |
B.Sc. in Geosciences at the Department of Earth and Environmental Sciences at University of Freiburg i. Br.
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2025
- Hurwitz, S., Stefánsson, A., Shock, E.L., & Kleine-Marshall, B. (2025). The geochemistry of continental hydrothermal systems. In Ariel Anbar, Dominique Weis (Eds.), Treatise on Geochemistry. (pp. 301-345). Elsevier.
2024
- Ciraula, D.A., Kleine-Marshall, B., Galeczka, I.M., & Lévy, L. (2024). Advanced Monitoring of H2S Injection through the Coupling of Reactive Transport Models and Geophysical Responses. Environmental Science & Technology. https://doi.org/10.1021/acs.est.3c10139
- Edwards, B.A., Pfeffer, M.A., Ilyinskaya, E., Kleine-Marshall, B., Mandon, C.L., Cotterill, A.,... Wang, F. (2024). Exceptionally low mercury concentrations and fluxes from the 2021 and 2022 eruptions of Fagradalsfjall volcano, Iceland. Science of the Total Environment, 917. https://doi.org/10.1016/j.scitotenv.2024.170457
- Prause, S., Weisenberger, T.B., Kleine-Marshall, B., Monien, P., Rispoli, C., & Stefánsson, A. (2024). Corrigendum to “Alteration of basaltic glass within the Surtsey hydrothermal system, Iceland – Implication to oceanic crust seawater interaction” [Journal of Volcanology and Geothermal Research 429 (2022) 107581] (Journal of Volcanology and Geothermal Research (2022) 429, (S0377027322001123), (10.1016/j.jvolgeores.2022.107581)). Journal of Volcanology and Geothermal Research. https://doi.org/10.1016/j.jvolgeores.2024.108135
- Stefánsson, A., Ricci, A., Garnett, M., Gunnarsson-Robin, J., Kleine-Marshall, B., Scott, S.W.,... Fiebig, J. (2024). Isotopic and kinetic constraints on methane origins in Icelandic hydrothermal fluids. Geochimica Et Cosmochimica Acta, 373, 84-97. https://doi.org/10.1016/j.gca.2024.03.015
- Toro Vivanco, D.I., Kleine-Marshall, B., Smit, M.J., Gunnarsdóttir, S.H., Franzson, H., & Stefánsson, A. (2024). Lithogeochemistry of the Nesjavellir geothermal field, SW Iceland—Implications for elemental mass movement in active geothermal systems. Geothermics, 120. https://doi.org/10.1016/j.geothermics.2024.103013
- Wainman, L., Ilyinskaya, E., Pfeffer, M.A., Mandon, C.L., Bali, E., Edwards, B.A.,... Mather, T.A. (2024). Trace Element Emissions Vary With Lava Flow Age and Thermal Evolution During the Fagradalsfjall 2021–2023 Eruptions, Iceland. Geochemistry Geophysics Geosystems, 25. https://doi.org/10.1029/2024GC011822
2023
- Peillod, A., Patten, C.G., Drüppel, K., Beranoaguirre, A., Zeh, A., Gudelius, D.,... Kolb, J. (2023). Disruption of a high-pressure unit during exhumation: Example of the Cycladic Blueschist unit (Thera, Ios and Naxos islands, Greece). Journal of Metamorphic Geology. https://doi.org/10.1111/jmg.12753
- Pisani, L., Koltai, G., Dublyansky, Y., Kleine, B.I., Whitehouse, M.J., Skrzypek, E.,... De Waele, J. (2023). Hydrothermal silicification and hypogene dissolution of an exhumed Neoproterozoic carbonate sequence in Brazil: Insights from fluid inclusion microthermometry and silicon-oxygen isotopes. Basin Research. https://doi.org/10.1111/bre.12748
- Ranta, E., Halldorsson, S.A., Barry, P.H., Ono, S., Robin, J.G., Kleine, B.I.,... Stefansson, A. (2023). Deep magma degassing and volatile fluxes through volcanic hydrothermal systems: Insights from the Askja and Kverkfjöll volcanoes, Iceland. Journal of Volcanology and Geothermal Research, 436. https://doi.org/10.1016/j.jvolgeores.2023.107776
2022
- Combaudon, V., Moretti, I., Kleine, B.I., & Stefánsson, A. (2022). Hydrogen emissions from hydrothermal fields in Iceland and comparison with the Mid-Atlantic Ridge. International Journal of Hydrogen Energy, 47(18), 10217-10227. https://doi.org/10.1016/j.ijhydene.2022.01.101
- Galeczka, I.M., Stefánsson, A., Kleine, B.I., Gunnarsson-Robin, J., Snæbjörnsdóttir, S.Ó., Sigfússon, B.,... Oelkers, E.H. (2022). A pre-injection assessment of CO2 and H2S mineralization reactions at the Nesjavellir (Iceland) geothermal storage site. International Journal of Greenhouse Gas Control, 115. https://doi.org/10.1016/j.ijggc.2022.103610
- Halldórsson, S.A., Marshall, E.W., Caracciolo, A., Matthews, S., Bali, E., Rasmussen, M.B.,... Stefánsson, A. (2022). Rapid shifting of a deep magmatic source at Fagradalsfjall volcano, Iceland. Nature, 609(7927), 529-534. https://doi.org/10.1038/s41586-022-04981-x
- Kleine, B.I., Stefánsson, A., Zierenberg, R.A., Jeon, H., Whitehouse, M.J., Jónasson, K.,... Weisenberger, T.B. (2022). Sulfate (re-)cycling in the oceanic crust: Effects of seawater-rock interaction, sulfur reduction and temperature on the abundance and isotope composition of anhydrite. Geochimica Et Cosmochimica Acta, 317, 65-90. https://doi.org/10.1016/j.gca.2021.10.016
- Prause, S., Weisenberger, T.B., Kleine, B.I., Monien, P., Rispoli, C., & Stefánsson, A. (2022). Alteration of basaltic glass within the Surtsey hydrothermal system, Iceland – Implication to oceanic crust seawater interaction. Journal of Volcanology and Geothermal Research, 429. https://doi.org/10.1016/j.jvolgeores.2022.107581
- Ricci, A., Kleine, B.I., Fiebig, J., Gunnarsson-Robin, J., Mativo Kamunya, K., Mountain, B., & Stefánsson, A. (2022). Equilibrium and kinetic controls on molecular hydrogen abundance and hydrogen isotope fractionation in hydrothermal fluids. Earth and Planetary Science Letters, 579. https://doi.org/10.1016/j.epsl.2021.117338
2021
- Kleine, B.I., Gunnarsson-Robin, J., Kamunya, K.M., Ono, S., & Stefánsson, A. (2021). Source controls on sulfur abundance and isotope fractionation in hydrothermal fluids in the Olkaria geothermal field, Kenya. Chemical Geology, 582. https://doi.org/10.1016/j.chemgeo.2021.120446
2020
- Heřmanská, M., Kleine, B.I., & Stefánsson, A. (2020). Geochemical constraints on supercritical fluids in geothermal systems. Journal of Volcanology and Geothermal Research, 394. https://doi.org/10.1016/j.jvolgeores.2020.106824
- Kleine, B.I., Stefánsson, A., Halldórsson, S.A., & Barnes, J.D. (2020). Impact of fluid-rock interaction on water uptake of the Icelandic crust: Implications for the hydration of the oceanic crust and the subducted water flux. Earth and Planetary Science Letters, 538. https://doi.org/10.1016/j.epsl.2020.116210
- Kleine, B.I., Stefánsson, A., Kjartansdóttir, R., Prause, S., Weisenberger, T.B., Reynolds, H.I.,... Gudmundsson, M.T. (2020). The Surtsey volcano geothermal system: An analogue for seawater-oceanic crust interaction with implications for the elemental budget of the oceanic crust. Chemical Geology, 550. https://doi.org/10.1016/j.chemgeo.2020.119702
2019
- Heřmanská, M., Kleine, B.I., & Stefánsson, A. (2019). Supercritical Fluid Geochemistry in Geothermal Systems. Geofluids, 2019. https://doi.org/10.1155/2019/6023534
- Jackson, M.D., Gudmundsson, M.T., Weisenberger, T.B., Michael Rhodes, J., Stefánsson, A., Kleine, B.I.,... Zimanowski, B. (2019). SUSTAIN drilling at Surtsey volcano, Iceland, tracks hydrothermal and microbiological interactions in basalt 50 years after eruption. Scientific Drilling , 25, 35-46. https://doi.org/10.5194/sd-25-35-2019
2018
- Kleine, B.I., Stefánsson, A., Halldórsson, S.A., Whitehouse, M.J., & Jónasson, K. (2018). Silicon and oxygen isotopes unravel quartz formation processes in the Icelandic crust. Geochemical Perspectives Letters, 7, 5-11. https://doi.org/10.7185/geochemlet.1811
2017
- Stefánsson, A., & Kleine, B.I. (2017). Hydrothermal Alteration. In (pp. 1-3). Springer Science and Business Media B.V..
2016
- Kleine, B.I., Pitcairn, I.K., & Skelton, A.D. (2016). Mineralogical controls on metamorphic fluid flow in metabasaltic sills from Islay, Scotland. Lithos, 248-251, 22-39. https://doi.org/10.1016/j.lithos.2016.01.011
- Kleine, B.I., & Stefánsson, A. (2016). Hypogene. In William M. White (Eds.), Encyclopedia of Geochemistry. (pp. 1-3). Cham: Springer.
- Kleine, B.I., Zhao, Z., & Skelton, A.D. (2016). Rapid fluid flow along fractures at greenschist facies conditions on Syros, Greece. American Journal of Science, 316(2), 169-201. https://doi.org/10.2475/02.2016.03
2015
- Kleine, B.I., Pitcairn, I.K., & Skelton, A.D. (2015). The mechanism of infiltration of metamorphic fluids recorded by hydration and carbonation of epidote-amphibolite facies metabasaltic sills in the SW Scottish Highlands. American Mineralogist, 100(11-12), 2702-2717. https://doi.org/10.2138/am-2015-5321
- Skelton, A.D., Lewerentz, A., Kleine, B.I., Webster, D., & Pitcairn, I.K. (2015). Structural Channelling of Metamorphic Fluids on Islay, Scotland: Implications for Paleoclimatic Reconstruction. Journal of Petrology, 56, 2145-2172. https://doi.org/10.1093/petrology/egv067
2014
- Kleine, B.I., Skelton, A.D., Huet, B., & Pitcairn, I.K. (2014). Preservation of Blueschist-facies Minerals along a Shear Zone by Coupled Metasomatism and Fast-flowing CO2-bearing Fluids. Journal of Petrology, 55, 1905-1939. https://doi.org/10.1093/petrology/egu045
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TraceS: Tracing sulphur cycling in the Iceland crust
(Third Party Funds Single)
Term: 1. January 2025 - 31. December 2027
Funding source: Deutsche Forschungsgemeinschaft (DFG)Despitethe large impact of human activity on the global S cycle, the natural S fluxesfrom oceans and lithosphere to atmosphere may be still poorly constrained.Especially in mid-ocean ridges (MORs), estimating the mantle-derived S flux tothe surface remains a challenge due to (1) a lack of data on S concentrations inbasaltic glasses, (2) variable S sources obscuring a possible mantle origin and(3) unknown amounts of S sequestrated in the oceanic crust upon fluid-rockinteraction. This project aims to determine the sources and fluxes of S withina MORs using the Icelandic crust as an analogue. In conjunction withgeochemical isotope modelling and state-of-the-art mass spectrometrictechniques, S concentrations, along with isotope compositions (S, Fe, O) in thermalfluids, bulk rock, pyrite and anhydrite will be used to constrain the fluxesfrom different sources (e.g. seawater, rock leaching) of S at MORs. Furthermore,the potential of fluid-rock interaction in hydrothermal systems along MORs ofpermanently fixing S by mineral formation upon fluid-rock interaction will beinvestigated. Remelting of such modified oceanic crust within subduction zones mightgreatly affect the S isotopic values of melts, volcanic gasses and geothermalfluids in volcanic arcs. Findings of this study will also have an impact onongoing research on sequestration of anthropogenic S within the Earth’s crust.
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Vorbereitung eines EU HORIZON Projekts zu Lagerstätten kritischer Metalle
(Third Party Funds Group – Overall project)
Term: 1. November 2023 - 30. November 2024
Funding source: Bundesministerium für Bildung und Forschung (BMBF)