Robert Frei

Robert Frei

Professor

ORCID: 0000-0001-7708-9881

Publication year:
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  1. 2024
  2. Published

    Chemostratigraphy of early Ediacaran carbonate rocks of the Cachoeirinha Group (Northeastern Brazil): Implications for paleonvironmental conditions and atmospheric oxygenation

    Usma, C. D., Sial, A. N., Ferreira, V. P., Gaucher, C. & Frei, Robert, 2024, In: Journal of South American Earth Sciences. 134, 17 p., 104744.

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

  3. Published

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

    Frederiksen, Jesper Allan, 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

  4. Published

    Geochemistry of Archean anorthosite-bearing layered intrusions

    Sotiriou, P., Polat, A., Kusky, T., Windley, B. F., Frei, Robert & Yang, X., 2024, In: Earth-Science Reviews. 249, 25 p., 104654.

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

  5. 2023
  6. Published

    Corg, N and Hg-isotopes and Hg chemostratigraphy in the Late Ordovician–early Silurian Transition, Argentine Precordillera

    Sial, A. N., Chen, J., Peralta, S., Gaucher, C., Korte, Christoph, Frei, Robert, Ferreira, V. P., Drude, L., Lacerda, D., Barbosa, J. A., Pereira, N. S., Ricardo, P., Riedel, R. & Gomez, J. C., 2023. 1 p.

    Research output: Contribution to conference › Poster › Research › peer-review

  7. Published

    Chromium isotopes track redox fluctuations in Proterozoic successions of the Chapada Diamantina, São Francisco craton, Brazil

    Caxito, F. A., Frei, Robert, Sial, A. N., Uhlein, G. J., de Moura, W. A. L., Pereira, E. & Rodrigues, R., 2023, In: Geology. 51, 1, p. 69-74

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

  8. Published

    Geological processes defining the formation of plumasite-type corundum in the Paleoproterozoic Isertoq Terrane, South-East Greenland

    Poulsen, Majken Djurhuus, Keulen, N., van Hinsberg, V. J., Kolb, J., Frei, Robert & Thomsen, T. B., 2023, In: Precambrian Research. 385, 23 p., 106940.

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

  9. Published

    Release and mobility of hexavalent chromium in contaminated soil with chemical factory waste: Experiments, Cr isotope analysis and reactive transport modeling

    Ceballos, E., Cama, J., Soler, J. M. & Frei, Robert, 2023, In: Journal of Hazardous Materials. 451, 15 p., 131193.

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

  10. Published

    Strong positive fractionation of chromium isotopes in iron formation of the Jacadigo Group (Brazil) – A link to enhanced atmospheric oxygenation during the Late Neoproterozoic

    Árting, T. B., Boggiani, P. C., Gaucher, C., Fernandes, H. A. & Frei, Robert, 2023, In: Gondwana Research. 124, p. 39-60

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

  11. Published

    Tales from Ginderup Mound in Thisted County, Denmark: Further Investigations of Female Mobility in the Nordic Bronze Age

    Reiter, S. S., Møller, N. A., Jørkov, M L S, Bech, J., Frei, Robert & Frei, Karin Margarita, 2023, In: Danish Journal of Archaeology. 12, 1, p. 1-25

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

  12. 2022
  13. Published

    High-resolution Ge-Si-Fe, Cr isotope and Th-U data for the Neoarchean Temagami BIF, Canada, suggest primary origin of BIF bands and oxidative terrestrial weathering 2.7 Ga ago

    Bau, M., Frei, Robert, Garbe-Schönberg, D. & Viehmann, S., 1 Jul 2022, In: Earth and Planetary Science Letters. 589, 9 p., 117579.

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

  14. Published

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

    Frederiksen, Jesper Allan, 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

  15. Published

    The proper choice of proxies for relevant strontium isotope baselines used for provenance and mobility studies in glaciated terranes – Important messages from Denmark

    Frei, Robert, Frank, A. B. & Frei, K. M., 15 May 2022, In: Science of the Total Environment. 821, 13 p., 153394.

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

  16. Published

    Geochemical signatures of soapstones from the Nuuk area, southern West Greenland – their use for fingerprinting of archaeological artefacts

    Keulen, N., Poulsen, M. D. & Frei, Robert, Apr 2022, In: Journal of Archaeological Science. 140, 15 p., 105552.

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

  17. Published

    Uranium isotope cycling on the highly productive Peruvian margin

    Bruggmann, S., Gilleaudeau, G. J., Romaniello, S. J., Severmann, S., Canfield, D. E., Anbar, A. D., Scholz, F. & Frei, Robert, 20 Feb 2022, In: Chemical Geology. 590, 12 p., 120705.

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

  18. Published

    Investigating sheep mobility at Montale, Italy, through strontium isotope analyses

    Sabatini, S., Frei, K. M., De Grossi Mazzorin, J., Cardarelli, A., Pellacani, G. & Frei, Robert, Feb 2022, In: Journal of Archaeological Science: Reports. 41, 12 p., 103298.

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

  19. 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

  20. Published

    Anatomy of a Neoarchean continental arc-backarc system in the Cross Lake-Pipestone Lake region, northwestern Superior Province, Canada

    Polat, A., Frei, Robert, Deng, H., Yang, X. & Sotiriou, P., 2022, In: Precambrian Research. 370, 34 p., 106556.

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

  21. Published

    C, Sr, Nd isotope chemostratigraphy and zircon provenance of the Witvlei Group (Namibia): Neoproterozoic glaciations and seawater evolution

    Hohl, S. V., Rodler, A. S., Viehmann, S., Huang, X., Xu, J., Gaucher, C., Germs, G. J. B., Hegenberger, W., Goderis, S., Wei, H. & Frei, Robert, 2022, In: Precambrian Research. 372, 20 p., 106600.

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

  22. Published

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

    Frederiksen, Jesper Allan, 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

  23. Published

    Constraining a bioavailable strontium isotope baseline for the Lake Garda region, Northern Italy: A multi-proxy approach

    Ladegaard-Pedersen, P., Frei, Robert, Frank, A. B., Saracino, M., Zorzin, R., Martinelli, N., Kaul, F., Kristiansen, K. & Frei, K. M., 2022, In: Journal of Archaeological Science: Reports. 41, 15 p., 103339.

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

  24. Published

    Early Cambrian highly metalliferous black shale in South China: Cu and Zn isotopes and a short review of other non-traditional stable isotopes

    Lehmann, B., Pašava, J., Šebek, O., Andronikov, A., Frei, Robert, Xu, L. & Mao, J., 2022, In: Mineralium Deposita. 57, 7, p. 1167–1187

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

  25. Published

    Low oxygen seawater and major shifts in the paleoenvironment towards the terminal Ediacaran: Insights from the Portfjeld Formation, North Greenland

    Rugen, E. J., Ineson, J. R. & Frei, Robert, 2022, In: Precambrian Research. 379, 19 p., 106781.

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

  26. Published

    Petrogenesis of the late Archean Pillow Basalts from the Chitradurga greenstone belt, Western Dharwar Craton (southern India)

    Rose, R., Mukherjee, R., Frei, Robert, Mondal, S. K. & Lingadevaru, M., 2022, In: Journal of Earth System Science. 131, 2, 26 p., 95.

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

  27. 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, Jesper Allan, 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

  28. 2021
  29. Published

    Goldilocks at the dawn of complex life: mountains might have damaged Ediacaran–Cambrian ecosystems and prompted an early Cambrian greenhouse world

    Caxito, F., Lana, C., Frei, Robert, Uhlein, G. J., Sial, A. N., Dantas, E. L., Pinto, A. G., Campos, F. C., Galvão, P., Warren, L. V., Okubo, J. & Ganade, C. E., Dec 2021, In: Scientific Reports. 11, 1, 15 p., 20010.

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

  30. 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

  31. Published

    Ediacaran banded iron formations and carbonates of the Cachoeirinha Group of NE Brazil: Paleoenvironment and paleoredox conditions

    Usma, C. D., Sial, A. N., Ferreira, V. P., Gaucher, C. & Frei, Robert, 1 Aug 2021, In: Journal of South American Earth Sciences. 109, 6 p., 103282.

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

  32. Published

    Chromium isotope heterogeneity on a modern carbonate platform

    Klaebe, R., Swart, P. & Frei, Robert, 1 Jul 2021, In: Chemical Geology. 573, 13 p., 120227.

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

  33. 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

  34. 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

  35. Published

    The Piedras de Afilar Formation (Neoproterozoic, Uruguay): Sedimentology and provenance of a key unit for SW-Gondwana paleogeography

    Pamoukaghlián, K., Gaucher, C., Poiré, D. G. & Frei, Robert, 1 Jun 2021, In: Journal of South American Earth Sciences. 108, 26 p., 103176.

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

  36. Published

    Microbially induced chromium isotope fractionation and trace elements behavior in lower Cambrian microbialites from the Jaíba Member, Bambuí Basin, Brazil

    Uhlein, G. J., Caxito, F. A., Frei, Robert, Uhlein, A., Sial, A. N. & Dantas, E. L., 1 Mar 2021, In: Geobiology. 19, 2, p. 125-146 22 p.

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

  37. Published

    Signals of combined chromium–cadmium isotopes in basin waters of the Early Cambrian – Results from the Maoshi and Zhijin sections, Yangtze Platform, South China

    Frei, Robert, Xu, L., Frederiksen, Jesper Allan & Lehmann, B., 1 Mar 2021, In: Chemical Geology. 563, 20 p., 120061.

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

  38. Published

    The Tapes Complex (Nico Pérez Terrane, Uruguay): Constraining the Mesoproterozoic evolution of the Río de la Plata Craton

    Gaucher, C., Frei, Robert, Samaniego, L., Will, T. M., Chemale, F., Gargiulo, M. F., Poiré, D. G., Ling, X., Li, X. & Li, Q., 1 Jan 2021, In: Journal of South American Earth Sciences. 105, 102906.

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

  39. Published

    A transient swing to higher oxygen levels in the atmosphere and oceans at similar to 1.4 Ga

    Wei, W., Frei, Robert, Klaebe, R., Tang, D., Wei, G., Li, D., Tian, L., Huang, F. & Ling, H., 2021, In: Precambrian Research. 354, 10 p., 106058.

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

  40. Published

    Commentary: Strontium Is Released Rapidly From Agricultural Lime–Implications for Provenance and Migration Studies

    Frei, Robert, 2021, In: Frontiers in Ecology and Evolution. 9, 4 p., 681896.

    Research output: Contribution to journal › Comment/debate › Research › peer-review

  41. Published

    Pulsed volcanism and rapid oceanic deoxygenation during Oceanic Anoxic Event 1a

    Bauer, K. W., Bottini, C., Frei, Robert, Asael, D., Planavsky, N. J., Francois, R., McKenzie, N. R., Erba, E. & Crowe, S. A., 2021, In: Geology. 49, 12, p. 1452-1456 5 p.

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

  42. Published

    Serpentinization in the Archean and Early Phanerozoic - Insights from chromium isotope and REY systematics of the Mg-Cr hydroxycarbonate stichtite and associated host serpentinites

    Kraemer, D., Frei, Robert, Ernst, D. M., Bau, M. & Melchiorre, E., 2021, In: Chemical Geology. 565, 13 p., 120055.

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

  43. Published

    Testing Late Bronze Age mobility in southern Sweden in the light of a new multi-proxy strontium isotope baseline of Scania

    Ladegaard-pedersen, P., Sabatini, S., Frei, Robert, Kristiansen, K., Frei, K. M. & Bondioli, L. (ed.), 2021, In: PLoS ONE. 16, 4, 35 p., e0250279.

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

  44. Published

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

    Frederiksen, Jesper Allan & Frei, Robert, 2021. 1 p.

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

  45. 2020
  46. Published

    Ediacaran Doushantuo-type biota discovered in Laurentia

    Willman, S., Peel, J. S., Ineson, J. R., Schovsbo, N. H., Rugen, E. J. & Frei, Robert, 1 Dec 2020, In: Communications Biology . 3, 1, 10 p., 647.

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

  47. Published

    Surface water oxygenation and bioproductivity – A link provided by combined chromium and cadmium isotopes in Early Cambrian metalliferous black shales (Nanhua Basin, South China)

    Frei, Robert, Lehmann, B., Xu, L. & Frederiksen, Jesper Allan, 5 Oct 2020, In: Chemical Geology. 552, 16 p., 119785.

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

  48. Published

    The link between surface water and groundwater-based drinking water – strontium isotope spatial distribution patterns and their relationships to Danish sediments

    Frei, Robert, Frei, K. M., Kristiansen, S. M., Jessen, Søren, Schullehner, J. & Hansen, B., 1 Oct 2020, In: Applied Geochemistry. 121, 11 p., 104698.

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

  49. Published

    Biogeochemical cycle of chromium isotopes at the modern Earth's surface and its applications as a paleo-environment proxy

    Wei, W., Klaebe, R., Ling, H., Huang, F. & Frei, Robert, 20 May 2020, In: Chemical Geology. 541, 119570.

    Research output: Contribution to journal › Review › Research › peer-review

  50. Published

    A strontium isotope baseline of Cyprus. Assessing the use of soil leachates, plants, groundwater and surface water as proxies for the local range of bioavailable strontium isotope composition

    Ladegaard-Pedersen, P., Achilleos, M., Dörflinger, G., Frei, Robert, Kristiansen, K. & Frei, K. M., 2020, In: Science of the Total Environment. 708, 134714.

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

  51. Published

    A strontium isotope pilot study using cremated teeth from the Vollmarshausen cemetery, Hesse, Germany

    Taylor, N., Frei, K. M. & Frei, Robert, 2020, In: Journal of Archaeological Science: Reports. 31, 102356.

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

  52. Published

    Characterisation of the natural attenuation of chromium contamination in the presence of nitrate using isotopic methods: A case study from the Matanza-Riachuelo River basin, Argentina

    Ceballos, E., Margalef-Marti, R., Carrey, R., Frei, Robert, Otero, N., Soler, A. & Ayora, C., 2020, In: Science of the Total Environment. 699, 11 p., 134331.

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

  53. Published

    Chromium Isotope Systematics in Modern and Ancient Microbialites

    Bruggmann, S., Rodler, A. S., Klaebe, R. M., Goderis, S. & Frei, Robert, 2020, In: Minerals. 10, 10, 24 p., 928.

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

  54. 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

  55. Published

    Enigmatic 1146 +/- 4 Ma old granite in the southeastern rim of the West African craton, now part of the Dahomeyan orogenic belt in Ghana

    Kalsbeek, F., Frei, D., Schersten, A., Frei, Robert, Gerdes, A. & Kalvig, P., 2020, In: Journal of African Earth Sciences. 167, 14 p., 103814.

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

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ID: 11756