Robert Frei
Professor
Geology
Øster Voldgade 10
1350 København K
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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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Chromium isotope fractionation during oxidative weathering of the Antrim Basalts: An insight into the global Cr geochemical cycle.
D'Arcy, J. M., Døssing, L. N., Frei, Robert & Babechuk, M., 20 Feb 2015. 1 p.Research output: Contribution to conference › Conference abstract for conference › Research
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Processes controlling the chromium isotopic composition of river water: constraints from basaltic river catchments
D'Arcy, J. M., Babechuk, M. G., Døssing, L. N., Gaucher, C. & Frei, Robert, 2016, In: Geochimica et Cosmochimica Acta. Supplement. 186, p. 296-315 20 p.Research output: Contribution to journal › Journal article › Research › peer-review
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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
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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
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Step-leach Pb-Pb dating of inclusion-bearing garnet and staurolite: with implications for Early Proterozoic tectonism in the Black Hills collisional orogen, South Dakota, United States
Dahl, P. S. & Frei, Robert, 1998, In: Geology. 26, 2, p. 111-114Research output: Contribution to journal › Journal article › Research › peer-review
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Comparative isotopic and chemical geochronometry of monazite, with implications for U-Th-Pb dating by electron microprobe: An example from metamorphic rocks of the eastern Wyoming Craton (U.S.A.)
Dahl, P. S., Hamilton, M. A., Jercinovic, M. L., Terry, M. P., Williams, M. L. & Frei, Robert, 2005, In: American Mineralogist. Vol. 90, p. 619-638Research output: Contribution to journal › Journal article › Research › peer-review
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2480 Ma mafic magmatism in the northern Black Hills, South Dakota: a new link connecting the Wyoming and Superior cratons
Dahl, P. S., Hamilton, M. A., Wooden, J. L., Foland, K. A. & Frei, Robert, 2006, In: Candian Journal of Earth Sciences. 43, p. 1579-1600Research output: Contribution to journal › Journal article › Research › peer-review
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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. 145-15Research output: Chapter in Book/Report/Conference proceeding › Conference abstract in proceedings › Research
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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
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Molybdenum evidence for expansive sulfidic water masses in similar ∼ 750 Ma oceans
Dahl, Tais Wittchen, Canfield, D. E., Rosing, Minik Thorleif, Frei, Robert, Gordon, G. W., Knoll, A. H. & Anbar, A. D., 2011, In: Earth and Planetary Science Letters. 311, 3-4, p. 264-274Research output: Contribution to journal › Journal article › Research › peer-review
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Molybdenum isotope variations in a redox-stratified lake: Removal mechanism and preservation in euxinic sediments
Dahl, Tais Wittchen, Anbar, A. D., Gordon, G. W., Rosing, Minik Thorleif, Frei, Robert & Canfield, D. E., 2008, Geochim. Cosmochim. Acta,. Vol. 72/12S. p. A194Research output: Chapter in Book/Report/Conference proceeding › Conference abstract in proceedings › Research
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Mo isotope variations in meromictic Lake Cadagno
Dahl, Tais Wittchen, Anbar, A. D., Gordon, G. W., Frei, Robert & Canfield, D. E., 2008, In: Geochim. Cosmochim.. Acta 71, Supplement 1, p. p. A196Research output: Contribution to journal › Conference abstract in journal › Research
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Molybdenum evidence for expansive sulfidic water masses in ~ 750 Ma oceans
Dahl, T. W., Canfield, D. E., Rosing, Minik Thorleif, Frei, Robert, Gordon, G. W., Knoll, A. H. & Anbar, A. D., 2011, In: Earth and Planetary Science Letters. 311, 3-4, p. 264-274 11 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Sr, Pb and Nd isotope studies and their bearing on the petrogenesis of the Jalor and Siwana complexes, Rajasthan, India: A reply
Dhar, S., Frei, Robert, Kramers, J. D., Nägler, T. F. & Kochhar, N., 1996, In: Journal of the Geological Society of India. 49, 4, p. 466-469Research output: Contribution to journal › Journal article › Research › peer-review
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Sr, Pb and Nd isotope studies and their bearing on the petrogenesis of the Jalor and Siwana complexes, Rajasthan, India
Dhar, S., Frei, Robert, Kramers, J. D., Nägler, T. F. & Kochhar, N., 1996, In: Journal of the Geological Society of India. 48, 2, p. 151-160Research output: Contribution to journal › Journal article › Research › peer-review
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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
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Provencance of the late Proterozoic to early Cambrian metaclastic sediments ot the Sierra de San Luis (Eastern Sierras Pampeanas) and Cordillera Oriental, Argentina
Drobe, M., López de Luchi, M., Steenken, A., Frei, Robert, Naumann, R., Siegesmund, S. & Wemmer, K., 2009, In: Journal of South American Earth Sciences. 28, 3, p. 239-262Research output: Contribution to journal › Journal article › Research › peer-review
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Lead concentrations and isotopic ratios in recent snow samples from high alpine sites
Döring, T., Frei, Robert, Gäggeler, H. W., Schwikowski, M. & Döscher, A., 1995. 4 p.Research output: Contribution to conference › Conference abstract for conference › Research
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Characterization of enriched lithospheric mantle components in ~2.7 Ga banded iron formations: an example from the Tati Greenstone Belt, Northeastern Botswana
Døssing, L. N., Frei, Robert, Stendal, H. & Mapeo, R., 2009, In: Precambrian Research. 172, 3-4, p. 334-356Research output: Contribution to journal › Journal article › Research › peer-review
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Reduction of hexavalent chromium by ferrous iron: A process of chromium isotope fractionation and its relevance to natural environments
Døssing, L. N., Dideriksen, K., Stipp, S. L. S. & Frei, Robert, 2011, In: Chemical Geology. 285, 1-4, p. 157-166 10 p.Research output: Contribution to journal › Journal article › Research › peer-review
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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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Potential leaching of Cr(VI) from laterite mines and residues of metallurgical products (red mud and slag): an integrated approach
Economou-Eliopoulos, M., Frei, Robert & Megremi, I., Mar 2016, In: Journal of Geochemical Exploration. 162, p. 40-49 10 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
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Application of chromium stable isotopes to the evaluation of Cr(VI) contamination in groundwater and rock leachates from central Euboea and the Assopos basin (Greece)
Economou-Eliopoulos, M., Frei, Robert & Atsarou, C., Nov 2014, In: CATENA. 122, p. 216-228 13 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Diet and mobility among Mesolithic hunter-gatherers in Motala (Sweden) - The isotope perspective
Eriksson, G., Frei, K. M., Howcroft, R., Gummesson, S., Molin, F., Liden, K., Frei, Robert & Hallgren, F., 2018, In: Journal of Archaeological Science: Reports. 17, p. 904-918 15 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Noble gases, K, U, Th, and Pb in native gold
Eugster, O., Niedermann, S., Thalmann, C., Frei, Robert, Kramers, J. D., Krähenbühl, U., Liu, Y. Z., Hofmann, B., Boer, R. H., Reimold, W. U. & Bruno, L., 1995, In: Journal of Geophysical Research: Solid Earth. B12, p. 24’677-24’689Research output: Contribution to journal › Journal article › Research › peer-review
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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
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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
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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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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
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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
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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
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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
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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
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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
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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
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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
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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
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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. 311–331Research output: Contribution to journal › Journal article › Research › peer-review
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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. 439-466Research output: Contribution to journal › Journal article › Research › peer-review
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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
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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
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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
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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
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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
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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
- 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
- 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
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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
- 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
- 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
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
Research output: Contribution to journal › Journal article › Research › peer-review
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