Robert Frei
Professor
Geology
Øster Voldgade 10
1350 København K
- Published
East Greenland ice core dust record reveals timing of Greenland ice sheet advance and retreat.
Simonsen, M. F., Baccolo, G., Blunier, Thomas, Borunda, A., Delmonte, B., Frei, Robert, Goldstein, S., Grinsted, Aslak, Kjær, Helle Astrid, Sowers, T., Svensson, Anders, Vinther, Bo Møllesøe, Vladimirova, D., Winckler, G., Winstrup, M. & Vallelonga, P., 3 Oct 2019, In: Nature Communications. 10, 8 p., 4494.Research output: Contribution to journal › Journal article › Research › peer-review
- 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
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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
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Efficient N-TIMS Re-isotope measurements on outgassed Ta filaments: very low filament blanks determined by a "standard addition" approach
Frei, Robert, Nägler, T. F. & Meisel, T., 1996, In: International Journal of Mass Spectrometry. 76, p. L7-L10Research output: Contribution to journal › Journal article › Research › peer-review
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Efficient N-TIMS rhenium isotope measurements on outgassed tantalum filaments: Very low filament blanks determined by a "standard addition" approach
Frei, Robert, Nägler, T. F. & Meisel, T., 1 Jan 1996, In: International Journal of Mass Spectrometry and Ion Processes. 153, 2-3, p. L7Research output: Contribution to journal › Journal article › Research › peer-review
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Element/Ca, C and O isotope ratios in modern brachiopods: Species-specific signals of biomineralization
Ullmann, C. V., Frei, Robert, Korte, Christoph & Lüter, C., 2017, In: Chemical Geology. 460, p. 15-24 10 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Elemental mapping using proton-induced X-rays
Przybylowicz, W. J., Mesjasz-Pryzybylowicz, J., Pineda, C. A., Churms, C. L., Ryan, C. G., Prozesky, V. M., Frei, Robert, Slabbert, J. P., Padayachee, J. & Reimold, W. U., 2001, In: X-Ray Spectrometry. 30, p. 156-163Research output: Contribution to journal › Journal article › Research › peer-review
- 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
- Published
Enriched alkaline lavas within a depleted picrite seccession: melting of old lithosphere induced by passing asthenosphenic melts.
Larsen, L. M., Pedersen, Asger Ken, Sundvoll, B. & Frei, Robert, 2001, In: Eleventh Annual V.M. goldschmidt Conference, Abstracts #3130. LPI Contribution. 1088, p. ?Research output: Contribution to journal › Conference abstract in journal › Research
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Environmentally available hexavalent chromium in soils and sediments impacted by dispersed fly ash in Sarigkiol basin (Northern Greece)
Kazakis, N., Kantiranis, N., Kalaitzidou, K., Kaprara, E., Mitrakas, M., Frei, Robert, Vargemezis, G., Vogiatzis, D., Zouboulis, A. & Filippidis, A., 2018, In: Environmental Pollution. 235, p. 632-641 10 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Erratum: (Science (April 19) (516))
Meibom, A. & Frei, Robert, 16 Aug 2002, In: Science. 297, 5584, 1 p.Research output: Contribution to journal › Comment/debate › Research › peer-review
- Published
Evidence for Neoarchean hydrous arc magmatism, the anorthosite-bearing Mayville Intrusion, western Superior Province, Canada
Sotiriou, P., Polat, A., Frei, Robert, Yang, X. & van Vessem, J., 2020, In: Lithos. 362-363, 105482.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Evidence for an ancient, highly radiogenic osmium isotopic reservoir in Earth
Meibom, A. & Frei, Robert, 2002, In: Kexue (Shanghai). 296, p. 516-518Research output: Contribution to journal › Journal article › Research › peer-review
- 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
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Extreme element mobility during transformation of Neoarchean (ca. 2.7 Ga) pillow basalts to a Paleoproterozoic (ca. 1.9 Ga) paleosol, Schreiber Beach, Ontario, Canada
Polat, A., Longstaffe, F., Weisener, C., Fryer, B., Frei, Robert & Kerrich, R., 2012, In: Chemical Geology. 326-327, p. 145-173 29 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Factors Controlling the Chromium Isotope Compositions in Podiform Chromitites
Economou-Eliopoulos, M., Frei, Robert & Mitsis, I., 2020, In: Minerals. 10, 1, 10.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Fedtsten - Godthåbsfjordens skjulte ressource
Poulsen, Majken Djurhuus, Knudsen, R. J., Keulen, N., Thorsøe, K. & Frei, Robert, 2018, In: Tidsskriftet Grønland. 4, 16 p.Research output: Contribution to journal › Journal article › Communication
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Field and geochemical characterisitics of the Mesoarchean (~3075 ma) Ivisaartoq greenstone belt, southern West Greenland: Evidence for seafloor hydrothermal alteration in a supra-subduction oceanic crust.
Polat, A., Appel, P. W. U., Frei, Robert, Pan, Y., Dilek, Y., Ordonez-Calderon, J. C., Fryer, B., Hollis, J. A. & Raith, J. G., 2006, In: Gondwana Research. 11, p. 69-91Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Fluctuations in Precambrian atmospheric oxygenation recorded by chromium isotopes
Frei, Robert, Gaucher, C., Canfield, D. E. & Poulton, S. W., 2009, In: Nature. 461, p. 250-253Research output: Contribution to journal › Journal article › Research › peer-review
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Fluctuations in late Neoproterozoic atmospheric oxidation — Cr isotope chemostratigraphy and iron speciation of the late Ediacaran lower Arroyo del Soldado Group (Uruguay)
Frei, Robert, Gaucher, C., Stolper, D. & Canfield, D. E., 2013, In: Gondwana Research. 23, 2, p. 797-811 15 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Formation of Alpine Au ~30 Ma ago: further results of the development of a dating method for native gold
Niedermann, S., Eugster, O., Frei, Robert, Krähenbühl, U., Kramers, J. D. & Thalmann, C., 1993, In: Meteoritics and Planetary Science. 28, p. 411-412Research output: Contribution to journal › Journal article › Research › peer-review
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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
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Fractionation behavior of chromium isotopes during coprecipitation with calcium carbonate: implications for their use as paleoclimatic proxy
Rodler, A., Sánchez-Pastor, N., Fernández-Díaz, L. & Frei, Robert, 2015, In: Geochimica et Cosmochimica Acta. 164, p. 221-235 15 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Generation of continental crust in the northern part of the Borborema Province, northeastern Brazil, from Archaean to Neoproterozoic
de Souza, Z. S., Kalsbeek, F., Deng, X., Frei, Robert, Kokfelt, T. F., Dantas, E. L., Li, J., Pimentel, M. M. & Galindo, A. C., Jul 2016, In: Journal of South American Earth Sciences. 68, p. 68-96Research output: Contribution to journal › Journal article › Research › peer-review
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Geochemical and Pb-Sr-Nd isotopic composition of ultrapotassic volcanic rocks from the extension-related Camardi-Ulukisla basin, Nigde Province, Central Anatolia, Turkey
Alpaslan, M., Boztug, D., Frei, Robert, Temel, A. & Kurt, M. A., 2006, In: Journal of Asian Earth Sciences. 27, p. 613-627Research output: Contribution to journal › Journal article › Research › peer-review
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Geochemical and Pb-Sr-Nd isotopic constraints indicating an enriched mantle source for late Cretaceous to early Tertiary volcanism, Central Anatolia, Turkey
Alpaslan, M., Frei, Robert, Boztug, D., Kurt, M. A. & Temel, A., 2004, In: International Geology Review. Vol. 46/11, p. 1022-1041Research output: Contribution to journal › Journal article › Research › peer-review
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Geochemical characteristics of the Quaternary volcanic rocks from Hatay region, Southern Turkey: Evidence for lithospheric mantle source. Geochim
Varol, E., Frei, Robert, Alpaslan, M., Kurt, M. A. & Temmel, A., 2007, In: Geochim. Cosmochim.. Acta 71, Supplement 1, p. A1059Research output: Contribution to journal › Conference abstract in journal › Research
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Geochemical constraints on the sources of Cr(VI) contamination in waters of Messapia (Central Evia) Basin
Economou-Eliopoulos, M., Megremi, I., Vasilatos, C., Frei, Robert & Mpourodimos, I., 2017, In: Applied Geochemistry. 84, p. 13-25 13 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Geochemical signatures in Late Triassic brachiopods from New Caledonia
Ullmann, C. V., Campbell, H. J., Frei, Robert & Korte, Christoph, Oct 2014, In: New Zealand Journal of Geology and Geophysics. 57, 4, p. 420-431 12 p.Research output: Contribution to journal › Journal article › Research › peer-review
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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
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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
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Geochemistry of Precambrian sedimentary rocks used to solve stratigraphical problems: An example from the Neoproterozoic Volta basin, Ghana
Kalsbeek, F. & Frei, Robert, 2010, In: Precambrian Research. 176, 1-4, p. 65-76 12 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Geochemistry of the belemnite rostrum: Genesis and diagenesis
Ullmann, C. V., Frei, Robert, Korte, Christoph & Hesselbo, S. P., 2015, p. 3203.Research output: Contribution to conference › Conference abstract for conference › Research › peer-review
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Geochemistry of the peat bog at Etang de la Gruère, Jura Mountains, Switzerland, and its record of atmospheric pb and lithogenic trace metals (Sc, Ti, Y, Zr, and REE) since 12,370 14C yr bp
Shotyk, W., Weiss, D., Kramers, J. D., Frei, Robert, Cheburkin, A. K., Gloor, M. & Reese, S., 14 Aug 2001, In: Geochimica et Cosmochimica Acta. 65, 14, p. 2337-2360 24 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Geochemistry of the peat bog at Étang de la Gruyère, Jura Mountains, Switzerland, and its record of atmospheric Pb and lithogenic trace metals (Sc, Ti, Y, and REE) since 1237014C yr BP
Shotyk, W., Weiss, D., Kramers, J. D., Frei, Robert, Cheburkin, A. K., Gloor, M. & Reese, S., 2001, In: Geochimica et Cosmochimica Acta. 65, p. 2337-2360Research output: Contribution to journal › Journal article › Research › peer-review
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Geochemistry of ultramafic rocks and hornblendite veins in the Fiskenæsset layered anorthosite complex, SW Greenland: evidence for hydrous upper mantle in the Archean
Polat, A., Fryer, B. J., Samson, I. M., Weisener, C., Appel, P. W. U., Frei, Robert & Windley, B. F., 2012, In: Precambrian Research. 214-215, p. 124-153 30 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Geochemistry, Nd, Pb and Sr isotope systematics, and U-Pb zircon ages of the Neoarchean Bad Vermilion Lake greenstone belt and spatially associated granitic rocks, western Superior Province, Canada
Wu, T., Polat, A., Frei, Robert, Fryer, B. J., Yang, K. & Kusky, T., Sep 2016, In: Precambrian Research. 282, p. 21-51Research output: Contribution to journal › Journal article › Research › peer-review
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Geochronology of granitoid and metasedimentary rocks from Togo and Benin, West Africa: comparisons with NE Brazil
Kalsbeek, F., Affaton, P., Ekwueme, B., Frei, Robert & Thrane, K., 2012, In: Precambrian Research. 196-197, p. 218-233 16 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Geochronology of the Hout River Shear Zone and the metamorphism in the Southern Marginal Zone of the Limpopo Belt, Southern Africa
Kreissig, K., Holzer, L., Frei, Robert, Villa, I. M., Kramers, J. D., Kröner, A., Smit, C. A. & van Reenen, D. D., 2001, In: Precambrian Research. 109, p. 145-174Research output: Contribution to journal › Journal article › Research › peer-review
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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
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Geochronology of the late Archean Razi and Chilimanzi suites of granites in Zimbabwe: implications for the late Archean tectonics of the Limpopo Belt and Zimbabwe Craton
Frei, Robert, Blenkinsop, T. G. & Schönberg, R., 1999, In: South African Journal of Geology. 102, p. 55-63Research output: Contribution to journal › Journal article › Research › peer-review
- 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
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Getting out of the extreme: Possible indications of Pre-3700 Ma oxygenic photosynthesis from Isua, West Greenland. J. Conf. Abstr
Rosing, Minik Thorleif & Frei, Robert, 2000.Research output: Contribution to conference › Conference abstract for conference › Research
- Published
Global Cr-isotope distributions in surface seawater and incorporation of Cr isotopes into carbonate shells
Paulukat, C. S., Frei, Robert, Vögelin, A. R. & Samankassou, E., 2015.Research output: Contribution to conference › Conference abstract for conference › Research › peer-review
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Gold occurrences and lead isotopes in Ketilidian Mobile Belt, South Greenland
Stendal, H. & Frei, Robert, 2000, In: Transactions Institution of Mining and Metallurgy (Sektion B). 109, p. B6-B13Research output: Contribution to journal › Journal article › Research › peer-review
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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
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Granite-hosted gold mineralization in the Midlands greenstone belt: a new type of low-grade large scale gold deposit in Zimbabwe
Buchholz, P., Herzig, P., Friedrich, G. & Frei, Robert, 1998, In: Mineralium Deposita. 33, p. 437-460Research output: Contribution to journal › Journal article › Research › peer-review
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Granites and granites in the East Greenland Caledonides
Kalsbeek, F., Higgins, A. K., Jepsen, H. F., Frei, Robert & Nutman, A. P., 2008, The Greenland Caledonides - evolution of the northeast margin of Laurentia. Higgins, A. K., Gilotti, J. A. & Smith, M. P. (eds.). Boulder, Colo.: Geological Society, p. 227-249 (Memoir / Geological Society of America; No. 202).Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research
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Growth of subcontinental lithospheric mantle beneath Zimbabwe started at or before 3.8 Ga: Re-Os study on chromites
Nägler, T. F., Kramers, J. D., Kamber, B. S., Frei, Robert & Prendergast, M. D. A., 1 Jan 1997, In: Geology. 25, 11, p. 983-986 4 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Growth of subcontinental lithospheric mantle beneath Zimbabwe started at ~3.8 Ga: A Re-Os study on chromites
Nägler, T. F., Kramers, J. D., Kamber, B. S., Frei, Robert & Prendergast, M. D. A., 1997, In: Geology. 25, 11, p. 983-986Research output: Contribution to journal › Journal article › Research › peer-review
ID: 11756
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Large Igneous Province volcanism, ocean anoxia and marine mass extinction
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Mapping human mobility during the third and second millennia BC in present-day Denmark
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Tracing the dynamic life story of a Bronze Age Female
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