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 communication and outreach events at the Department of Earth Science:
- Promotion of the field of Geobiology and Geology on the "Ka vil DU bli" orientation day for 10th grade students (2017, 2018)
- Mineralogy class during preparation week for Norwegian Geography Olympiad candidates (2019)
- Promotion of the BSc in Geochemistry and Geobiology on open days for high-school students (2019, 2020)
- Promotion of the MSc in Geochemistry and Geobiology for BSc students at the Department of Earth Science (2019)
I am also active in outreach outside of the Department of Earth Science:
- Assembly of an educational and engaging rock and mineral collection for the Geology Day of the Norwegian Geological Society (2018, 2019)
- Assembly of an oil and gas-related rock collection for the Equinor theme days at the VilVite Science museum (2019, 2020)
- "O-fags dagen" workshop on the geology of the Bergen area for kayak paddlers from the BSI paddling club (2020)
- 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 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)
Roerdink, D.L., 2020, News & Views: Redrawing the early sulfur cycle. Nature Geoscience, vol. 13, p. 526–527. doi.org/10.1038/s41561-020-0608-z
Møller, T.E., Van der Bilt, W., Roerdink, D.L., Jørgensen, S.L., 2020, Microbial community structure in Arctic lake sediments reflect variations in Holocene climate conditions. Frontiers in Microbiology, vol. 11, p. 1520. doi.org/10.3389/fmicb.2020.01520
Marques, A.F.A., Roerdink, D.L., Baumberger, T., de Ronde, C.E.J., Ditchburn, R.G., Denny, A., Thorseth, I.H., Okland, I., Lilley, M.D., Whitehouse, M.J., Pedersen, R.B., 2020, The Seven Sisters Hydrothermal System: First Record of Shallow Hybrid Mineralization Hosted in Mafic Volcaniclasts on the Arctic Mid-Ocean Ridge. Minerals, vol. 10, p. 439. doi.org/10.3390/min10050439
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
- 2021. Ammonia-oxidizing archaea have similar power requirements in diverse marine oxic sediments. The ISME Journal.
- 2020. The Seven Sisters Hydrothermal System: First Record of Shallow Hybrid Mineralization Hosted in Mafic Volcaniclasts on the Arctic Mid-Ocean Ridge. Minerals. 439.
- 2020. Microbial community structure in Arctic lake sediments reflect variations in Holocene climate conditions. Frontiers in Microbiology. 1-13.
- 2020. Geochemical transition zone powering microbial growth in subsurface sediments. Proceedings of the National Academy of Sciences of the United States of America. 32617-32626.
- 2019. Transport of carbon dioxide and heavy metals from hydrothermal vents to shallow water by hydrate-coated gas bubbles. Chemical Geology. 120-132.
- 2019. Petrogenetic evolution of metabasalts and metakomatiites of the lower Onverwacht Group, Barberton Greenstone Belt (South Africa). Chemical Geology. 152-177.
- 2018. Novel sedimentological fingerprints link shifting depositional processes to Holocene climate transitions in East Greenland. Global and Planetary Change. 52-64.
- 2016. Reworking of atmospheric sulfur in a Paleoarchean hydrothermal system at Londozi, Barberton Greenstone Belt, Swaziland. Precambrian Research. 195-204.
- 2015. Paleoarchean sulfur cycling: Multiple sulfur isotope constraints from the Barberton Greenstone Belt, South Africa. Precambrian Research. 311-322.
- 2015. Experimental constraints on kinetic and equilibrium silicon isotope fractionation during the formation of non-biogenic chert deposits. Chemical Geology. 40-51.
- 2014. Silicon isotope fractionation during abiotic silica precipitation at low temperatures: Inferences from flow-through experiments. Geochimica et Cosmochimica Acta. 95-114.
- 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. 203-215.
- 2015. Arctic Mid-Ocean Ridge, NORMAR/CGB 2015 Test Cruise, R/V G.O.SARS, Senter for Geobiologi. .
- 2018. The Archean sulfate paradox – when the present is not the key to the past.
- 2020. Geologi fra kajakken.
- 2018. All that glitters is not gold - Understanding the formation of seafloor metal deposits.
- 2020. Barite precipitation was associated with low temperature hydrothermal venting in the 3.2 Ga Mapepe Formation, Barberton Greenstone Belt.
- 2019. Tracing Subsurface Iron Cycling in the Sediment-Influenced Loki’s Castle Hydrothermal Vent Field with Stable Fe Isotopes.
- 2019. The rise and fall of Archean bedded barite: a record of emergent crustal weathering and biosphere development.
- 2019. Conductive Cooling and Microbial Carbon Transformations in Diffuse Hydrothermal Fluids at Loki’s Castle.
- 2017. Pyrite geochemistry as recorder of early biosphere processes.
- 2017. Microbial and geochemical variation in sediments along the arctic mid-ocean spreading ridge system.
- 2017. Geochemical transition zones are hotspots of nitrogen cycling in Arctic marine sediments.
- 2015. Sulfate in the Paleoarchean ocean: localized enrichment or variable preservation? Abstract #69108.
- 2015. Sr Isotopic Insights into the Formation of Paleoarchean Barite.
- 2020. Redrawing the early sulfur cycle. Nature Geoscience. 526-527.
- 2015. Shallow Water Venting on the Arctic Mid-Ocean Ridge: the Seven Sisters Hydrothermal System, Mineral Resources in a Sustainable World, Proceedings of the 13th Biennial SGA Meeting. Society for Geology Applied to Mineral Deposits, University of Nancy.
- 2018. East Greenland lake sediments capture surface process response to Holocene climate transitions. Geophysical Research Abstracts.
- 2019. The Microbial Community Structure in Arctic Lake Sediments Reflects Variation in Holocene Climate Conditions.
- 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.
- 2018. The biogeochemistry of Arctic lake sediments: paleoclimate signal or post-depositional cycling? .
- 2017. Subsurface sulfur cycling in Loki’s Castle hydrothermal barite field: insights from sulfate reduction rates.
- 2014. Searching for traces of early life in Archean barite deposits using multiple sulfur isotopes.
- 2014. Preliminary observations from a remote shallow hydrothermal system on the Arctic Mid-Ocean Ridge.
- 2020. Geokjemi - Studere jorden fra et kjemisk synspunkt.
- 2020. Geobiologi - Studere samspillet mellom livet og jorden.
- 2014. Weblog CGB Research Cruise 2014 'Hydrothermal vent fields on the Arctic Mid-Ocean Ridge'(http://cgbcruise2014.b.uib.no/).
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