Robert Frei

Robert Frei

Professor

ORCID: 0000-0001-7708-9881

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  1. Published

    ‘Plug in plug' Os distillation

    Nägler, T. F. & Frei, Robert, 1997, In: Schweizerische Mineralogische und Petrographische Mitteilungen. 77, p. 123-127

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

  2. Published

    trapped noble gases in native gold: Radiogenic He and fission Xe in  U-rich minerals accompanying placer gold

    Niedermann, S., Eugster, O., Thalmann, C., Frei, Robert, Kramers, J. D., Bruno, L. & Hofmann, B., 1994, In: Lunar Planetary Science. 25, p. 997-998

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

  3. Published

    Weathering on land and transport of chromium to the ocean in a subtropical region (Misiones, NW Argentina): A chromium stable isotope perspective

    Frei, Robert, Poiré, D. G. & Frei, Karin Margarita, Aug 2014, In: Chemical Geology. 381, p. 110-124 15 p.

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

  4. Published

    Was the Black Hills domain (South Dakota) always part of the Archean Wyoming Craton? new evidence from ~3.4-2.7 Ga detrital-zircon populations found in both ~1.9 and ~2.5 Ga strata

    Dahl, P. S., Frei, Robert & Whitehouse, W. M. J., 2008, Geological Society of America Abstracts with Programs. Vol. 40(6). p. 145-15

    Research output: Chapter in Book/Report/Conference proceeding › Conference abstract in proceedings › Research

  5. 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

  6. Published

    Variations of redox conditions in the atmosphere and Yangtze Platform during the Ediacaran-Cambrian transition: Constraints from Cr isotopes and Ce anomalies

    Wei, W., Frei, Robert, Gilleaudeau, G. J., Li, D., Wei, G., Huang, F. & Ling, H., 2020, In: Palaeogeography, Palaeoclimatology, Palaeocology. 543, 11 p., 109598.

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

  7. 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

  8. 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

  9. Published

    Unraveling the tectono-metamorphic history in the Isua supracrustals (West Greenland): Mineral stepwise leaching evidence for early Archean metasomatic-metamorphic events.

    Frei, Robert, Rosing, Minik Thorleif, Krogstad, E. J., Storey, M. & Albarede, F., 1999, publisher. p. 91

    Research output: Chapter in Book/Report/Conference proceeding › Conference abstract in proceedings › Research

  10. Published

    Unraveling the record of successive high grade events in the Central Zone of the Limpopo Belt using Pb single phase dating of metamorphic minerals

    Holzer, L., Frei, Robert, Barton jr., J. M. & Kramers, J. D., 1998, In: Precambrian Research. 87, p. 87-115

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

  11. Published

    U-Pb geochronologic study of magmatic zircon in Paleoproterozoic granitic pegmatite and associated metapelites, Black Hills, South Dakota: Implications for gold petrogenesis and sedimentary provenance

    Ghosh, A., Frei, Robert, Whitehouse, M. J. & Dahl, P. S., 2008, Geological Society of America Abstracts with Programs,. Vol. 40(6). p. 145-160

    Research output: Chapter in Book/Report/Conference proceeding › Conference abstract in proceedings › Research

  12. Published

    U-Pb and Pb-Pb dating of diagenetic processes in black shales: True and false Pb-Pb isochrons

    Liebetrau, V., Frei, Robert, Buchardt, B. & Israelson, C., 1997, In: EOS : Transactions. v.78/46, p. F381

    Research output: Contribution to journal › Journal article › Research

  13. Published

    U-Pb age constraints for the La Tuna Granite and Montevideo Formation (Paleoproterozoic, Uruguay): Unravelling the structure of the Rio de la Plata Craton

    Pamoukaghlian, K., Gaucher, C., Frei, Robert, Poire, D. G., Chemale, F., Frei, D. & Will, T. M., 2017, In: Journal of South American Earth Sciences. 79, p. 443-458 16 p.

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

  14. Published

    U, He and Ar isotope systematics in fluid inclusions of vein gold, quartz and carbonates from Brusson, Val d'Ayas (NW Italy): (U+Th)/He dating of gold and isotope tracing

    Pettke, T., Frei, Robert, Kamensky, I. L., Kramers, J. D., Tolstikhin, I. N. & Villa, I. M., 1995, In: Boletin de la Sociedad Espanola del Mineralogia. 18, p. 181-182

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

  15. 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

  16. Published

    Tracing the Indian Ocean Mantle Domain Through Time: Isotopic Results from Old West Indian, East Tethyan, and South Pacific Seafloor

    Mahoney, J. J., Frei, Robert, Tejada, M. L. G., Mo, X. X., Leat, P. T. & Nägler, T. F., 1998, In: Journal of Petrology. v.39/7, p. 1285-1306

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

  17. Published

    Tracing redox processes during paleoclimatic changes in the Neoproterozoic: stable chromium isotopic results from the Arroyo del Soldado Group (Ediacaran, Uruguay)

    Frei, Robert & Gaucher, C., 2007.

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

  18. Published

    Trace elements and isotope geochemistry (C, O, Fe, Cr) of the Cauê iron formation, Quadrilátero Ferrífero, Brazil: Evidence for widespread microbial dissimilatory iron reduction at the Archean/Paleoproterozoic transition

    Teixeira, N. L., Caxito, F. A., Rosière, C. A., Pecoits, E., Vieira, L., Frei, Robert, Sial, A. N. & Poitrasson, F., 2017, In: Precambrian Research. 298, p. 39-55 17 p.

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

  19. Published

    Trace element systematics of the Neoarchean Fiskenæsset anorthosites and associated rocks, SW Greenland: Evidence for a magmatic arc origin.

    Polat, A. B., Appel, P. W. U., Fryer, B., Windley, B., Frei, Robert, Samson, I. M. & Huang, H., 2009, In: Precambrian Research. 175, p. 87-115

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

  20. Published

    Trace element and isotopic characterization of Neoarchean and Paleoproterozoic iron formations in the Black Hills (South Dakota, USA): assessment of chemical change during 2.9-1.9 Ga deposition bracketing the 2.4-2.2 Ga first rise of atmospheric oxygen

    Frei, Robert, Frei, K. M., Rintza Hansen, T., Munck Frandsson, M. & Apel Jensen, L., 2008, In: Precambrian Research. 162, p. 441-474 33 p.

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

  21. Published

    Trace element and isotopic characterization of Neoarchean - Paleoproterozoic BIFs (Black Hills, South Dakota, USA) straddling thefirst rise of atmospheric oxygen between 2.4 and 2.0 Ga

    Frei, Robert & Dahl, P. S., 2008, In: Geochim. Cosmochim.. Acta 71, Supplement 1, p. A296

    Research output: Contribution to journal › Conference abstract in journal › Research

  22. Published

    Towards a calibrated astronomical timescale for the Mid Ordovician

    Rasmussen, Christian Mac Ørum, Thibault, Nicolas Rudolph, Stouge, Svend, Siggaard-Andersen, M. L., Costa, M., Schovsbo, N., Calner, M., Dahlqvist, P., Korte, Christoph, Frei, Robert, Storey, M., Connelly, J., Pedersen, G. K., Rasmussen, B. W., Rasmussen, J. A. & Nielsen, A. T., 2016, p. 2812 .

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

  23. Published

    Topography-driven hydrothermal breccia mineralization of Pliocene age at Grimsel Pass, Aar massif, Central Swiss Alps

    Hofmann, B. A., Helfer, M., Diamond, L. W., Villa, I. M., Frei, Robert & Eikenberg, J., 2004, In: Schweizerische Mineralogische und Petrographische Mitteilungen. 84, 3, p. 271-302

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

  24. Published

    Timing between granitoid emplacement and associated gold mineralization: examples from the ca. 2.7 Ga Harare-Shamva Greenstone Belt, Northern Zimbabwe

    Vinyu, M. L., Frei, Robert, Frei, Robert & Jelsma, H. A., 1996, In: Canadian Journal of Earth Sciences. 33, 7, p. 981-992

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

  25. Published

    Time constraints on the tectonic evolution of the eastern Sierras Pampeanas (Central Argentina).

    Siegesmund, S., Steenken, A., Martino, R. D., Wemmer, K., Lopez de Luchi, M. G., Frei, Robert, Presnyakov, S. & Guereschi, A., 2010, In: International Journal of Earth Sciences. 99, 6, p. 1199-1226

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

  26. Published

    The timing of high-temperature retrogression in the Reynolds Range, central Australia: Constraints from single mineral Pb-Pb dating

    Buick, I. S., Frei, Robert & Cartwright, I., 1999, In: Contributions to Mineralogy and Petrology. 135, p. 244-254

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

  27. Published

    The tectono-metamorphic event at 2 Ga in the Limpopo Belt and the resetting behaviour of chronometers at high temperature

    Holzer, L., Kamber, B. S., Kramers, J. D. & Frei, Robert, 1995, Proterozoic Crustal and Metallogenic Evolution: Special Publication of the Geological Survey of  Namibia. McManus, M. N. C. (ed.). Windhoek, p. 127-138

    Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research

  28. Published

    The role of pH on Cr(VI) partitioning and isotopic fractionation during its incorporation in calcite

    Füger, A., Bruggmann, S., Frei, Robert, Leis, A., Dietzel, M. & Mavromatis, V., 2019, In: Geochimica et Cosmochimica Acta. 265, p. 520-532 13 p.

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

  29. 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

  30. Published

    The potential of the coral species Porites astreoides as a paleoclimate archive for the Tropical South Atlantic Ocean

    Pereira, N. S., Sial, A. N., Frei, Robert, Ullmann, C. V., Korte, Christoph, Kikuchi, R. K. P., Ferreira, V. P. & Kilbourne, K. H., 2017, In: Journal of South American Earth Sciences. 77, p. 276-285 10 p.

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

  31. Published

    The origin of phonolites and trachytes from the Col de Guéry area, le Mont-Dore, Massif Central, France

    Bernth, U., Brousse, R., Frei, Robert & Sørensen, H., 2002, In: Matematisk Fysiske Meddelelser - Kongelige Danske Videnskabernes Selskab. 50, p. 61

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

  32. Published

    The origin of geochemical trends and Eoarchean (ca. 3700 Ma) zircons in Mesoarchean (ca. 3075 Ma) ocelli-hosting pillow basalts, Ivisaartoq greenstone belt, SW Greenland: evidence for crustal contamination versus crustal recycling.

    Polat, A. B., Frei, Robert, Fryer, B. & Appel, P. W. U., 2009, In: Chemical Geology. 268, p. 248-271

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

  33. Published

    The origin of early Archean banded iron formations and of continental crust, Isua, southern West Greenland

    Polat, A. & Frei, Robert, 2005, In: Precambrian Research. Vol. 138, p. 151-175

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

  34. Published

    The origin and compositions of Mesoarchean oceanic crust: evidence from the 3075 Ma Ivisaartoq greenstone belt, southern West Greenland

    Polat, A., Frei, Robert, Appel, P. W. U., Dilek, Y., Fryer, B., Ordonez-Calderon, J. C. & Yang, Z., 2008, In: Lithos. 100, p. 293-321

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

  35. Published

    The occurrence of porphyritic syenite at Lake Mykle, the Oslo rift: a possible derivate of larvikite

    Andersen, T., Frei, Robert, Sørensen, H. & Westphal, N., 2004, In: Norsk Geologiske Undersøkelse Bulletin. 442, p. 23-28

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

  36. 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

  37. Published

    The least radiogenic terrestrial leads: implications for the early Archean crustal evolution and hydrothermal-metasomatic processes in the Isua Supracrustal Belt (West Greenland)

    Frei, Robert & Rosing, Minik Thorleif, 2001, In: Chemical Geology. 181, p. 47-66

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

  38. 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

  39. 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

  40. Published

    The geographic distribution of Sr isotopes from surface waters and soil extracts over the island of Bornholm (Denmark) – A base for provenance studies in archaeology and agriculture

    Frei, Robert & Frei, Karin Margarita, 2013, In: Applied Geochemistry. 38, p. 147-160 14 p.

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

  41. Published

    The geodynamic evolution of the eastern Sierras Pampeanas based on geochemical, Sm-Nd, Pb-Pb and SHRIMP data

    Drobe, M., Lopez de Luchi, M., Steenken, A., Wemmer, K., Naumann, R., Frei, Robert & Siegesmund, S., 2011, In: International Journal of Earth Sciences. 100, 2-3, p. 631-657 27 p.

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

  42. Published

    The geochemistry of modern calcareous barnacle shells and applications for palaeoenvironmental studies

    Ullmann, C. V., Gale, A. S., Haggett, J., Wray, D., Frei, Robert, Korte, Christoph, Broom-Fendley, S., Littler, K. & Hesselbo, S. P., 2018, In: Geochimica et Cosmochimica Acta. 243, p. 149-168 20 p.

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

  43. Published

    The genesis of Archean chromitites from the Nuasahi and Sukinda massifs in the Singhbhum Cration, India

    Mondal, S. K., Ripley, E. M., Li, C. & Frei, Robert, 2006, In: Precambrian Research. 148, p. 45-66

    Research output: Contribution to journal › Journal article › Research

  44. Published

    The genesis of Archaean chromitites from the Nuasahi and Sukinda massifs in the Singhbhum Craton, India

    Mondal, S. K., Ripley, E. M., Li, C. & Frei, Robert, 20 Jul 2006, In: Precambrian Research. 148, 1-2, p. 45-66 22 p.

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

  45. Published

    The fate of chromium during tropical weathering: A laterite profile from Central Madagascar

    Berger, A. & Frei, Robert, Jan 2014, In: Geoderma. 213, p. 521-532 12 p.

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

  46. Published

    The extent of inter-mineral isotope equilibrium: a systematic bulk U-Pb step leaching (PbSL) isotope study of individual minerals from the Tertiary granite of Jerissos (northern Greece)

    Frei, Robert, 1996, In: European Journal of Mineralogy. 8, p. 1175-1189

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

  47. Published

    The evolution of the mineralizing fluid in the porphyry copper system of Skouries, NE Chalkidiki, (Greece): evidence from combined Pb-Sr and stable isotope data

    Frei, Robert, 1995, In: Economic Geology . 90, p. 746-762

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

  48. Published

    The chromium isotopic composition of an Early to Middle Ordovician marine carbonate platform, eastern Precordillera, San Juan, Argentina

    D'Arcy, J. M., Frei, Robert, Gilleaudeau, G. J., Peralta, S., Kah, L. & Gaucher, C., 16 Aug 2015. 1 p.

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

  49. Published

    The behavior of molybdenum and its isotopes across the chemocline and in the sediments of sulfidic Lake Cadagno, Switzerland

    Dahl, Tais Wittchen, Anbar, A. D., Gordon, G. W., Rosing, Minik Thorleif, Frei, Robert & Canfield, D. E., Jan 2010, In: Geochimica et Cosmochimica Acta. 74, 1, p. 144-163 20 p.

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

  50. Published

    The age of the earliest animal fossils

    Barfod, G. H., Albarède, F., Knoll, A. A., Shuhai, X., Trelouk, P., Frei, Robert & Baker, J. A., 2002, In: Earth and Planetary Science Letters. 201, p. 203-212

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

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ID: 11756