My research interests focus on the use of traditional and non-traditional stable isotope systems to detect chemical and biological processes involved in the formation of minerals and mineral deposits. I study environments ranging from the earliest habitats on Earth to present-day deep sea hydrothermal vents, and I integrate isotope data with geochemical and microbiological data to obtain insights into interactions between microbial and abiotic processes.
Specific research interests include:
- The origin and paleoenvironmental significance of early Archean (3.6-3.2 billion year old) barite deposits
- Multiple sulfur isotope biomarkers and rate measurements (radiotracer) for microbial activity in Archean and modern hydrothermal settings
- Metal stable isotopes (Fe, Cu) as proxies for sub-seafloor ore-forming processes in seafloor hydrothermal systems
- Experimental determination of fractionation factors for non-traditional stable isotopes (Si, Cu)
PhD degree (cum laude) from Utrecht University, The Netherlands (2013): "Geology and stable isotope geochemistry of Paleoarchean sulfur: formation, preservation and geobiology of ancient pyrite and barite".
I am actively involved in outreach events at the Department of Earth Science and have made several promotional materials to promote Geochemistry and Geobiology to future students:
- Promotional poster on Geochemistry for prospective BSc students (English and Norwegian)
- Promotional poster on Geobiology for prospective BSc students (English and Norwegian)
- Brochure highlighting the members and possibilities in the Geochemistry and Geobiology group for prospective MSc students
I am also happy to provide rocks and minerals to teachers and musea. Feel free to contact me if you would like to borrow such material.
I am course responsible and teaching in the following courses at the Department of Earth Science:
- GEOV-103 Introduction to Mineralogy and Petrography
- GEOV-342 The Geochemical Toolbox (new from Spring 2020)
- GEOV-344 Geobiology and evolution of life on Earth (new from Spring 2020)
- PhD student Apolline Samin (2020-2023), Investigating Cu isotope fractionation as a tracer for seafloor mineral deposit formation using hydrothermal experiments (main supervisor)
- PhD student Henrike Wilborn (2018-2019), Experimental and field investigations of the potential of Cu isotopes as tracers for seafloor sulfide ore formation (main supervisor)
- PhD student Francesca Vulcano (2018-2022), Short chain hydrocarbon degraders in hydrothermal vent systems on the Arctic Mid-Ocean Ridge (co-supervisor)
- MSc student Karen Moltubakk (2020-2022), Detecting microbial sulfate reduction coupled to anaerobic methane oxidation in hydrothermal sediments with stable isotopes (S, Fe) and trace elements (main supervisor)
- MSc student Lotte Johannessen (2020-2022), Investigating multiple sulfur isotope variations in active hydrothermal chimneys and fluids from the Arctic Mid Ocean Ridge (main supervisor)
- MSc student Ingvild Aarrestad (2018-2020), Tracing contamination from historical mining sites in Norway with Cu isotopes (main supervisor)
- MSc student Maria Salem (2018-2020), Quantifying Earth system interactions in the Mid-Pleistocene Transition (co-supervisor)
- MSc student Jan-Kristoffer Landro (2014-2016), Characterizing the distribution of microbial sulfate reduction in Loki's Castle hydrothermal system of the Arctic Mid-Ocean Ridge (AMOR) (main supervisor)
Schneider, K.P., Hoffmann, J.E., Münker, C., Patyniak, M., Sprung, P., Roerdink, D., Garbe-Schönberg, D., Kröner, A., 2019, Petrogenetic evolution of metabasalts and metakomatiites of the lower Onverwacht Group, Barberton Greenstone Belt (South Africa). Chemical Geology, vol. 511, p. 152-177.
Stensland, A., Baumberger, T., Lilley, M.D., Okland, I.E., Dundas, S.H., Roerdink, D.L., Thorseth, I.H., Pedersen, R.B., 2019, Transport of carbon dioxide and heavy metals from hydrothermal vents to shallow water by hydrate-coated gas bubbles. Chemical Geology, vol. 513, p. 120-132.
Van der Bilt, W.G.M., Rea, B., Spagnolo, M., Roerdink, D.L., Jørgensen, S.L., Bakke, J., 2018, Novel sedimentological fingerprints link shifting depositional processes to Holocene climate transitions in East Greenland. Global and Planetary Change, vol. 164, p. 52-64.
DL Roerdink, PRD Mason, MJ Whitehouse, FM Brouwer, 2016, Reworking of atmospheric sulfur in a Paleoarchean hydrothermal system at Londozi, Barberton Greenstone Belt, Swaziland, Precambrian Research 280, 195-204
A Montinaro, H Strauss, PRD Mason, DL Roerdink, C Münker, U Schwarz-Schampera, NT Arndt, J Farquhar, NJ Beukes, J Gutzmer, 2015, Paleoarchean sulfur cycling: Multiple sulfur isotope constraints from the Barberton Greenstone Belt, South Africa, Precambrian Research 267, 311-322.
DL Roerdink, SHJM van den Boorn, S Geilert, PZ Vroon, MJ van Bergen, 2015, Experimental constraints on kinetic and equilibrium silicon isotope fractionation during the formation of non-biogenic chert deposits, Chemical Geology 402, 40-51
S Geilert, PZ Vroon, DL Roerdink, P Van Cappellen, MJ van Bergen, 2014, Silicon isotope fractionation during abiotic silica precipitation at low temperatures: Inferences from flow-through experiments, Geochimica et Cosmochimica Acta 142, 95-114
DL Roerdink, 2013, Geology and stable isotope geochemistry of Paleoarchean sulfur. Formation, preservation and geobiology of ancient pyrite and barite, Utrecht studies in earth sciences 31
DL Roerdink, PRD Mason, MJ Whitehouse, T Reimer, 2013, High-resolution quadruple sulfur isotope analyses of 3.2 Ga pyrite from the Barberton Greenstone Belt in South Africa reveal distinct environmental controls on sulfide isotopic arrays, Geochimica et Cosmochimica Acta 117, 203-215
DL Roerdink, PRD Mason, J Farquhar, T Reimer, 2012, Multiple sulfur isotopes in Paleoarchean barites identify an important role for microbial sulfate reduction in the early marine environment, Earth and Planetary Science Letters 331, 177-186
Are you a bachelor or master student and interested in a short-term (unpaid) research project in geochemistry? Would you like to help out researchers by performing (simple) tasks in the laboratory and getting experience with analytical methods? Do you want to see what life of a geochemist is like and if this might be something for you? Or would you like to get some extra experience in geochemical methods to improve your CV?
I am always happy to work with enthusiastic interns, so please feel free to contact me to discuss options.
Examples of previous research projects:
- Sulfate reduction rates and total organic carbon in sediments from the Knipovich Ridge (2016)
- Development of mineral separation methods for iron isotope analyses (2018)
- Geochemical characterization and sequential extraction of iron from hydrothermal sediment (2019)
- Testing the Triskem CU resin for Cu isotope analysis of hydrothermal minerals and basalts (2019)
Possible open projects:
- Evaluating the effects of sample storage on dissolved metal concentrations
- Three-dimensional imaging of sulfide chimneys using CT scanning