Robert Frei

Robert Frei

Professor

ORCID: 0000-0001-7708-9881

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  1. Published

    Chromium isotope fractionation between modern seawater and biogenic carbonates from the Great Barrier Reef, Australia: Implications for the paleo-seawater delta δ53 reconstruction

    Farkas, J., Fryda, J., Paulukat, C., Hathorne, E. C., Matouskova, S., Rohovec, J., Frydova, B., Francova, M. & Frei, Robert, 2018, In: Earth and Planetary Science Letters. 498, p. 140-151 12 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  2. Published

    Constraining Shallow Seawater Oxygenation for the Yangtze Platform During the Early Cambrian

    Frank, A. B., Klaebe, R. M., Xu, L. & Frei, Robert, 1 Jul 2021, In: Paleoceanography and Paleoclimatology. 36, 7, 19 p., e2021PA004282.

    Research output: Contribution to journal › Journal article › Research › peer-review

  3. Published

    Fractionation Behavior of Chromium Isotopes during the Sorption of Cr (VI) on Kaolin and its Implications for Using Black Shales as a Paleoredox Archive

    Frank, A. B., Klaebe, R. M. & Frei, Robert, 2019, In: Geochemistry Geophysics Geosystems. 20, 5, p. 2290-2302 13 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  4. Published

    Redox fluctuations during the Ediacaran-Cambrian transition, Nanhua Basin, South China: Insights from Cr isotope and REE+Y data

    Frank, A. B., Klaebe, R. M., Xu, L. & Frei, Robert, 2019, In: Chemical Geology. 525, p. 321-333 13 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  5. Published

    The geographic distribution of bioavailable strontium isotopes in Greece – A base for provenance studies in archaeology

    Frank, A. B., Frei, Robert, Moutafi, I., Voutsaki, S., Orgeolet, R., Kristiansen, K. & Frei, K. M., 1 Oct 2021, In: Science of the Total Environment. 791, 16 p., 148156.

    Research output: Contribution to journal › Journal article › Research › peer-review

  6. Published

    Isotopic range of bioavailable strontium on the Peloponnese peninsula, Greece: A multi-proxy approach

    Frank, A. B., Frei, Robert, Triantaphyllou, M., Vassilakis, E., Kristiansen, K. & Frei, K. M., 1 Jun 2021, In: Science of the Total Environment. 774, 15 p., 145181.

    Research output: Contribution to journal › Journal article › Research › peer-review

  7. Published

    A multi-proxy, bioavailable strontium isotope baseline for southern Almería, Spain: Using modern environmental samples to constrain the isotopic range of bioavailable strontium

    Frank, A. B., Frei, Robert, Kristiansen, K. & Frei, Karin Margarita, 2022, In: Applied Geochemistry. 144, 14 p., 105405.

    Research output: Contribution to journal › Journal article › Research › peer-review

  8. Published

    Chromium isotope composition of organic-rich marine sediments and their mineral phases and implications for using black shales as a paleoredox archive

    Frank, A. B., Klaebe, R. M., Löhr, S., Xu, L. & Frei, Robert, 2020, In: Geochimica et Cosmochimica Acta. 270, p. 338-359 22 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  9. Published

    Cadmium isotopes in Bahamas platform carbonates: A base for reconstruction of past surface water bioproductivity and their link with chromium isotopes

    Frederiksen, J. A., Klaebe, R. M., Farkas, J., Swart, P. K. & Frei, Robert, 2022, In: Science of the Total Environment. 806, 2, 17 p., 150565.

    Research output: Contribution to journal › Journal article › Research › peer-review

  10. Published

    Combined cadmium and chromium isotopes record a collapse of bioproductivity across the Cretaceous—Paleogene boundary in the Danish basin

    Frederiksen, J. A., Thibault, Nicolas Rudolph, Gilleaudeau, G. J., Bjerrum, Christian J., Moreau, J. & Frei, Robert, 2024, In: Chemical Geology. 654, 122058.

    Research output: Contribution to journal › Journal article › Research › peer-review

  11. Published

    Variations of cadmium concentrations and cadmium isotopes in Mytilus from North Atlantic and Baltic Sea

    Frederiksen, J. A. & Frei, Robert, 2021. 1 p.

    Research output: Contribution to conference › Conference abstract for conference › Research

  12. Published

    Cadmium isotopes in Late Ediacaran–Early Cambrian Yangtze Platform carbonates – reconstruction of bioproductivity in ambient surface seawater

    Frederiksen, J. A., Wei, W., Rugen, E. J., Ling, H. & Frei, Robert, 30 May 2022, In: Palaeogeography, Palaeoclimatology, Palaeoecology - An International Journal for the Geo-Sciences. 601, 18 p., 111096.

    Research output: Contribution to journal › Journal article › Research › peer-review

  13. Published

    Strontium isotope ratios from the Swabo-Franconian Basin (Germany) and a new compilation of marine 87Sr/86Sr signatures for the Upper Sinemurian to Toarcian: global uniformity and driving forces for marine 87Sr/86Sr

    Frederiksen, J. A., Ullmann, C. V., Frei, Robert & Korte, Christoph, 2022, In: Newsletters on Stratigraphy. 55, 3, p. 311–331

    Research output: Contribution to journal › Journal article › Research › peer-review

  14. Published

    Was it for walrus? Viking Age settlement and medieval walrus ivory trade in Iceland and Greenland

    Frei, K. M., Coutu, A. N., Smiarowski, K., Harrison, R., Madsen, C. K., Arneborg, J., Frei, Robert, Gudmundsson, G., Sindbaek, S. M., Woollett, J., Hartman, S., Hicks, M. & McGovern, T. H., 27 May 2015, In: World Archaeology. 47, 3, p. 439-466

    Research output: Contribution to journal › Journal article › Research › peer-review

  15. Published

    Mapping human mobility during the third and second millennia BC in present-day Denmark

    Frei, K. M., Bergerbrant, S., Sjögren, K., Jørkov, M L S, Lynnerup, Niels, Harvig, L., Allentoft, Morten Erik, Sikora, Martin, Price, T. D., Frei, Robert & Kristiansen, K., 2019, In: PLoS ONE. 14, 8, e0219850.

    Research output: Contribution to journal › Journal article › Research › peer-review

  16. Published

    Tracing the dynamic life story of a Bronze Age Female

    Frei, Karin Margarita, Mannering, U., Kristiansen, K., Allentoft, Morten Erik, Wilson, A. S., Skals, I., Tridico, S., Nosch, Marie Louise Bech, Willerslev, Eske, Clarke, L. & Frei, Robert, 2015, In: Scientific Reports. 10431.

    Research output: Contribution to journal › Journal article › Research › peer-review

  17. Published

    A matter of months: high precision migration chronology of a Bronze Age female

    Frei, K. M., Villa, Chiara, Jørkov, M L S, Allentoft, Morten Erik, Kaul, F., Ethelberg, P., Reiter, S. S., Wilson, A. S., Taube, M., Olsen, J., Lynnerup, Niels, Willerslev, Eske, Kristiansen, K. & Frei, Robert, 5 Jun 2017, In: PLoS ONE. 12, 6, 20 p., e0178834.

    Research output: Contribution to journal › Journal article › Research › peer-review

  18. Published

    Provenance of ancient textiles: a pilot study evaluating the Sr isotope system in wool

    Frei, Karin Margarita, Frei, Robert, Mannering, U., Gleba, M., Nosch, Marie Louise Bech & Lyngstrøm, Henriette Syrach, 2009, In: Archaeometry. 51, 2, p. 252-276 25 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  19. Published

    Removal of natural organic dyes from wool- implications for ancient textile provenance

    Frei, Karin Margarita, Vanden Berghe, I., Frei, Robert, Mannering, U. & Lyngstrøm, Henriette Syrach, 2010, In: Journal of Archaeological Science. 37, 9, p. 2136-2145 10 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  20. Published

    The geographic distribution of strontium isotopes in Danish surface waters - A base for provenance studies in archaeology, hydrology and agriculture

    Frei, Karin Margarita & Frei, Robert, Mar 2011, In: Applied Geochemistry. 26, 3, p. 326-340 15 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  21. Published

    Provenance of ancient textiles - a pilot study evaluating the strontium isotope system in wool

    Frei, Karin Margarita, Frei, Robert, Nosch, Marie Louise Bech, Mannering, U., Gleba, M. & Lyngstrøm, Henriette Syrach, 2009, In: Archaeometry. 51, 2, p. 252-276 25 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  22. Published

    Geochronology of the late Archaean Razi and Chilimanzi suites of granites in Zimbabwe: Implications for the late Archaean tectonics of the Limpopo Belt and Zimbabwe Craton

    Frei, Robert, Blenkinsop, T. G. & Schönberg, R., 1 Mar 1999, In: South African Journal of Geology. 102, 1, p. 55-63 9 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  23. Published

    Mono-sample Pb-Pb dating of pyrrhotite and tourmaline: Proterozoic vs. Archean intracratonic gold mineralization in Zimbabwe

    Frei, Robert & Pettke, T., 1 Jan 1996, In: Geology. 24, 9, p. 823-826 4 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  24. Published

    Extensive oxidative weathering in the aftermath of a late Neoproterozoic glaciation - Evidence from trace element and chromium isotope records in the Urucum district (Jacadigo Group) and Puga iron formations (Mato Grosso do Sul, Brazil)

    Frei, Robert, Døssing, L. N., Gaucher, C., Boggiani, P. C., Frei, K. M., Árting, T. B., Crowe, S. A. & Freitas, B. T., 2017, In: Gondwana Research. 49, p. 1-20 20 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  25. Published

    Shallow retardation of the strontium isotope signal of agricultural liming - implications for isoscapes used in provenance studies

    Frei, Robert, Frei, K. M. & Jessen, Søren, 2020, In: Science of the Total Environment. 706, 12 p., 135710.

    Research output: Contribution to journal › Journal article › Research › peer-review

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