Robert Frei
Professor
Geology
Øster Voldgade 10
1350 København K
- 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
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Provenance of the Late Ediacaran Rocha Formation, Cuchilla Dionisio Terrane, Uruguay: Tectonic implications on the assembly of Gondwana
Abre, P., Blanco, G., Gaucher, C., Frei, D. & Frei, Robert, 2020, In: Precambrian Research. 342, 105704.Research output: Contribution to journal › Journal article › Research › peer-review
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The Pan-African West Congo belt in the Republic of Congo (Congo Brazzaville): stratigraphy of the Mayombe and West Congo supergroups studied by detrital zircon geochronology
Affaton, P., Kalsbeek, F., Boudzoumou, F., Trompette, R., Thrane, K. & Frei, Robert, 2016, In: Precambrian Research. 272, p. 185-202 18 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Response to "Comment on "The Nd and Hf isotopic evolution of the mantle through the Archean. Results from the Isua supracrustals, West Greenland, and from the Birimian terranes of West Africa" by Blichert-Toft et al. (1999)
Albarede, F., Blichert-Toft, J., Frei, Robert & Rosing, Minik Thorleif, 2001, In: Geochimica et Cosmochimica Acta. 65, p. 2023-2025Research 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 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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Origin of the ultrapotassic volcanics within the Late Cretaceous to early Tertiary Ulukisla Basin, Central Anatolia, Turkey. 14th Annual V.M. Goldschmidt Conference, Copenhagen, Denmark, June 7-12
Alpaslan, M., Frei, Robert, Kurt, M. A., Temel, A. & Boztug, D., 2004, In: Geochimica et Cosmochimica Acta. Vol. 68/11S, p. A605Research output: Contribution to journal › Journal article › Research
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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. 23-28Research output: Contribution to journal › Journal article › Research › peer-review
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Porphyritic syenite at Lake Mykle, the Oslo rift: a possible derivative of larvikite
Andersen, T., Frei, Robert, Sørensen, H. & Westphal, N. L., 2004, In: Norges Geologiske Undersøkelse, Bulletin. 442, p. 23-28Research output: Contribution to journal › Journal article › Research › peer-review
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Dacitic ocelli in mafic lavas, 3.7-3.8 Ga Isua greenstone belt, Western Greenland: geochemical evidence for partial melting of oceanic crust and magma mixing
Appel, P. W. U., Polat, A. & Frei, Robert, 2009, In: Chemical Geology. 258, p. 105-124Research output: Contribution to journal › Journal article › Research › peer-review
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Different degrees of partial melting of the enriched mantle source for Plio-Quaternary basic volcanism, Toprakkale (Osmaniye) Region, Southern Turkey
Bagci, U., Alpaslan, M., Frei, Robert, Kurt, M. A. & Temel, A., Mar 2011, In: Turkish Journal of Earth Sciences. 20, 1, p. 115-135 21 p.Research output: Contribution to journal › Journal article › Research › peer-review
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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. 203-212Research output: Contribution to journal › Journal article › Research › peer-review
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New Lu-Hf and Pb-Pb age constraints on the earliest animal fossils
Barfod, G. H., Albarède, F., Knoll, A. H., Xiao, S., Télouk, P., Frei, Robert & Baker, J., 13 Aug 2002, In: Earth and Planetary Science Letters. 201, 1, p. 203-212 10 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Lu-Hf and PbSL geochronology of apatites from Proterozoic terranes: a first look at Lu-Hf isotopic closure in metamorphic apatite
Barfod, G. H., Krogstad, E. J., Frei, Robert & Albarède, F., 2005, In: Geochimica et Cosmochimica Acta. Vol. 69, p. 1847-1859Research output: Contribution to journal › Journal article › Research › peer-review
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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
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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
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Rare earth element mineralogy and geochemistry in a laterite profile from Madagascar
Berger, A., Janots, E., Gnos, E., Frei, Robert & Bernier, F., Feb 2014, In: Applied Geochemistry. 41, p. 218-228 11 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Cr-isotopes and REE variations in a laterite profile: Implication for redox processes and element mobility during weathering
Berger, A. & Frei, Robert, 2011, In: Mineralogical Magazine. 75, 3, p. 516 1 p.Research output: Contribution to journal › Conference abstract in journal › Research
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Dating brittle tectonic movements with cleft monazite: fluid-rock interaction and formation of REE minerals
Berger, A., Gnos, E., Janots, E., Whitehouse, M., Soom, M., Frei, Robert & Waight, Tod, 2013, In: Tectonics. 32, 5, p. 1176–1189 14 p.Research output: Contribution to journal › Journal article › Research › peer-review
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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
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Continued study of the origin of the cratonic upper mantle
Bernstein, S., Kelemen, P. B., Hanghøj, K., Kelley, R., Blusztajn, J. & Frei, Robert, 1999, Italien. 10 p.Research output: Book/Report › Report › Research
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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. 61Research output: Contribution to journal › Journal article › Research › peer-review
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Osmium and lead isotopes of rare OsIrRu minerals: A core-mantle boundary derivation?
Bird, J. M., Meibom, A., Frei, Robert & Nägler, T. F., 1999, In: Earth and Planetary Science Letters. 170, p. 83-92Research output: Contribution to journal › Journal article › Research › peer-review
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Osmium and lead isotopes of rare OsIrRu minerals: A core-mantle boundary derivation?
Bird, J. M., Meibom, A., Frei, Robert & Nägler, T. F., 1998, In: EOS : Transactions. v.79/45, p. F966Research output: Contribution to journal › Journal article › Research
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Archean and proterozoic mineralization and tectonics at the Renco mine (Northern Marginal Zone, Limpopo Belt, Zimbabwe)
Blenkinsop, T. G. & Frei, Robert, 1 Dec 1996, In: Economic Geology . 91, 7, p. 1225-1238 14 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Archean and Proterozoic mineralization and tectonics at Renco Mine (Northern Marginal Zone, Limpopo Belt, Zimbabwe)
Blenkinsop, T. G. & Frei, Robert, 1996, In: Economic Geology. 91, p. 1225-1238Research output: Contribution to journal › Journal article › Research › peer-review
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Archean and Proterozoic mineralization and tectonics at Renco Mine (Northern Marginal Zone, Limpopo Belt, Zimbabwe): a reply
Blenkinsop, T. G. & Frei, Robert, 1997, In: Economic Geology. 92, p. 747-748Research output: Contribution to journal › Journal article › Research › peer-review
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Archean and proterozoic mineralization and tectonics at the renco mine (northern marginal zone, limpopo belt, Zimbabwe)-a reply
Blenkinsop, T. G. & Frei, Robert, 1 Dec 1997, In: Economic Geology . 92, 6, p. 747-748 2 p.Research output: Contribution to journal › Comment/debate › Research › peer-review
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The Nd and Hf isotopic evolution of the mantle through the Archean. Results from the Isua supracrustals, West Greenland, and from the Birimian terranes of West Africa
Blichert-Toft, J., Albarede, F., Rosing, Minik Thorleif, Frei, Robert & Bridgewater, D., 1999, In: Geochimica et Cosmochimica Acta. 63, p. 3901-3914Research output: Contribution to journal › Journal article › Research › peer-review
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Complex Sm-Nd and Lu-Hf isotope systematics of metamorphic garnets from the Isua Supracrustal Belt, West Greenland
Blichert-Toft, J. & Frei, Robert, 2001, In: Geochimica et Cosmochimica Acta. 65, p. 3177-3187Research output: Contribution to journal › Journal article › Research › peer-review
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Nd and Pb isotopes of Mn/Fe precipitates of the Baltic Sea: climate change versus pollution
Bock, B., Liebetrau, V., Eisenhauer, A., Frei, Robert, Kronz, A. & Leipe, T., 2004, In: Geochimica et Cosmochimica Acta. 11S, p. A480Research output: Contribution to journal › Conference abstract in journal › Research
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Nd isotope signature of Holocene Baltic Mn/Fe precipitates as monitor of climate change during the Little Ice Age
Bock, B., Liebetrau, V., Eisenhauer, A., Frei, Robert & Leipe, T., 2005, In: Geochimica et Cosmochimica Acta. Vol. 69, p. 2253-2263Research output: Contribution to journal › Journal article › Research › peer-review
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Lead isotopic evidence for a mixed provenance for Roman water pipes from Pompeii
Boni, M., Di Maio, G., Frei, Robert & Villa, I. M., 2000, In: Archaeometry. 42, p. 201-208Research output: Contribution to journal › Journal article › Research › peer-review
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On the formation of peridotite-derived Os-rich PGE alloys
Brenker, F. E., Meibom, A. & Frei, Robert, 2003, In: American Mineralogist. 88, p. 1731-1740Research output: Contribution to journal › Journal article › Research › peer-review
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Chromium isotope cycling in the water column and sediments of the Peruvian continental margin
Bruggmann, S., Scholz, F., Klaebe, R. M., Canfield, D. E. & Frei, Robert, 2019, In: Geochimica et Cosmochimica Acta. 257, p. 224-242 23 p.Research output: Contribution to journal › Journal article › Research › peer-review
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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
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Heterogeneity and incorporation of chromium isotopes in recent marine molluscs (Mytilus)
Bruggmann, S., Klaebe, R. M., Paulukat, C. & Frei, Robert, 2019, In: Geobiology. 17, 4, p. 417-435 19 p.Research output: Contribution to journal › Journal article › Research › peer-review
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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
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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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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. 244-254Research output: Contribution to journal › Journal article › Research › peer-review
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Highly fractionated chromium isotopes in Mesoproterozoic-aged shales and atmospheric oxygen
Canfield, D. E., Zhang, S., Frank, A. B., Wang, X., Wang, H., Su, J., Ye, Y. & Frei, Robert, 2018, In: Nature Communications. 9, 11 p., 2871.Research 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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Multiproxy geochemical and isotope stratigraphy records of a Neoproterozoic Oxygenation Event in the Ediacaran Sete Lagoas cap carbonate, Bambui Group, Brazil
Caxito, F. A., Frei, Robert, Uhlein, G. J., Dias, T. G., Árting, T. B. & Uhlein, A., 2018, In: Chemical Geology. 481, p. 119-132 14 p.Research output: Contribution to journal › Journal article › Research › peer-review
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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. 69-74Research output: Contribution to journal › Journal article › Research › peer-review
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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
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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
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An energy-dispersive Miniprobe Multielement analyzer (EMMA) for direct analysis of trace elements and chemical age dating of single mineral grains
Cheburkin, A. K., Frei, Robert & Shotyk, W., 1997, In: Chemical Geology. 135, p. 75-87Research output: Contribution to journal › Journal article › Research › peer-review
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Atmospheric oxygenation three billion years ago
Crowe, S., Døssing, L. N., Beukes, N. J., Bau, M., Kruger, S. J., Frei, Robert & Canfield, D. E., 2013, In: Nature. 501, 7468, p. 535-538 4 p.Research output: Contribution to journal › Letter › Research › peer-review
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Chromium isotope fractionation during oxidative weathering of a modern basaltic weathering profile.
D'Arcy, J. M., Døssing, L. N. & Frei, Robert, 8 Jun 2014. 1 p.Research output: Contribution to conference › Poster › Research
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Redox fluctuations in the Early Ordovician oceans: an insight from chromium stable isotopes
D'Arcy, J. M., Gilleaudeau, G. J., Peralta, S., Gaucher, C. & Frei, Robert, 2017, In: Chemical Geology. 448, p. 1-12 12 p.Research 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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