Robert Frei
Professor
Geology
Øster Voldgade 10
1350 København K
- 2017
- Published
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
- Published
Reply to comments by Sanjay K. Mukhopadhyay, Sucharita Pal, J. P. Shrivastava on the paper by Sial et al. (2016) Mercury enrichments and Hg isotopes in Cretaceous-Paleogene boundary successions: Links to volcanism and palaeoenvironmental impacts. Cretaceous Research 66, 60-81
Sial, A. N., Chen, J., Lacerda, L. D., Frei, Robert, Tewari, V. C., Pandit, M. K., Gaucher, C., Ferreira, V. P., Cirilli, S., Peralta, S., Korte, Christoph, Barbosa, J. A. & Pereira, N. S., 2017, In: Cretaceous Research. 76, p. 84-88 5 p.Research output: Contribution to journal › Comment/debate › Research › peer-review
- 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
- 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
- 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
- 2016
- Published
Mercury enrichment and Hg isotopes in Cretaceous-Paleogene boundary successions: Links to volcanism and palaeoenvironmental impacts
Sial, A. N., Chen, J., Lacerda, L. D., Frei, Robert, Tewari, V. C., Pandit, M. K., Gaucher, C., Ferreira, V. P., Cirilli, S., Peralta, S., Korte, Christoph, Barbosa, J. A. & Pereira, N. S., Nov 2016, In: Cretaceous Research. 66, p. 60-81Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Chromium isotope stratigraphy of Ediacaran cap dolostones, Doushantuo Formation, South China
Rodler, A., Hohl, S. V., Guo, Q. & Frei, Robert, 15 Oct 2016, In: Chemical Geology. 436, p. 24-34Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Oxygen and carbon isotope and Sr/Ca signatures of high-latitude Permian to Jurassic calcite fossils from New Zealand and New Caledonia
Ullmann, C. V., Campbell, H. J., Frei, Robert & Korte, Christoph, 1 Oct 2016, In: Gondwana Research. 38, p. 60-73Research output: Contribution to journal › Journal article › Research › peer-review
- Published
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
- 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
- Published
Lithospheric mantle xenoliths sampled by melts from upwelling asthenosphere: The Quaternary Tasse alkaline basalts of southeastern British Columbia, Canada
Friedman, E., Polat, A., Thorkelson, D. J. & Frei, Robert, May 2016, In: Gondwana Research. 33, p. 209-230Research output: Contribution to journal › Journal article › Research › peer-review
- Published
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
- Published
Oxidative elemental cycling under the low O2 Eoarchean atmosphere
Frei, Robert, Crowe, S. A., Bau, M., Polat, A., Fowle, D. A. & Døssing, L. N., 11 Feb 2016, In: Scientific Reports. 6, 21058.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Imperial Porphyry from Gebel Abu Dokhan, the Red Sea Mountains, Egypt: Part H. Geochemistry
Makovicky, Emil, Frei, Robert, Bailey, John C & Karup-Moller, S., Jan 2016, In: Neues Jahrbuch für Mineralogie - Abhandlungen / Journal of Mineralogy and Geochemistry. 193, 1, p. 29-44Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Chromium isotope, REE and redox-sensitive trace element chemostratigraphy across the late Neoproterozoic Ghaub glaciation, Otavi Group, Namibia
Rodler, A., Frei, Robert, Gaucher, C. & Germs, G. J. B., 2016, In: Precambrian Research. 286, p. 234-249 16 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Chromium-isotope signatures in scleractinian corals from the Rocas Atoll, Tropical South Atlantic
Pereira, N. S., Vögelin, A. R., Paulukat, C. S., Sial, A. N., Ferreira, V. P. & Frei, Robert, 2016, In: Geobiology. 14, 1, p. 54–67 12 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Early Cambrian Black Shale-Hosted Mo-Ni and V Mineralization on the Rifted Margin of the Yangtze Platform, China: Reconnaissance Chromium Isotope Data and a Refined Metallogenic Model
Lehmann, B., Frei, Robert, Xu, L. & Mao, J., 2016, In: Economic Geology . 111, 1, p. 89-103Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Imperial porphyry from Gebel Abu Dokhan, the Red Sea Mountains, Egypt Part I. mineralogy, petrology and occurrence
Makovicky, Emil, Frei, Robert, Karup-Moller, S. & Bailey, John C, 2016, In: Neues Jahrbuch fur Mineralogie, Abhandlungen. 193, 1, p. 1-27 27 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Oceanographic Change in the Late Cretaceous Chalk Sea (Denmark): Clues from Chromium Isotopes
Gilleaudeau, G. J., Vögelin, A. R., Thibault, Nicolas Rudolph, Moreau, J., Korte, Christoph, Ullmann, C. V. & Frei, Robert, 2016, p. p. 944.Research output: Contribution to conference › Conference abstract for conference › Research › peer-review
- Published
Onset of main Phanerozoic marine radiation sparked by emerging Mid Ordovician icehouse
Rasmussen, Christian Mac Ørum, Ullmann, C. V., Jakobsen, K. G., Lindskog, A., Hansen, J., Hansen, T., Eriksson, M. E., Dronov, A., Frei, Robert, Korte, Christoph, Nielsen, Arne Thorshøj & Harper, D. A. T., 2016, In: Scientific Reports. 6, 9 p., 18884.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Oxygenation of the mid-Proterozoic atmosphere: clues from chromium isotopes in carbonates
Gilleaudeau, G. J., Frei, Robert, Kaufman, A. J., Kah, L. C., Azmy, K., Bartley, J. K., Chernyavskiy, P. & Knoll, A. H., 2016, In: Geochemical Perspectives. 2, 2, p. 178-186 9 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
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
- Published
The Cr-isotope signature of surface seawater - a global perspective
Paulukat, C. S., Gilleaudeau, G. J., Chernyavskiy, P. & Frei, Robert, 2016, In: Chemical Geology. 444, p. 101-109 9 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
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
- 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
- 2015
- 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
- Published
Chemical and isotopic architecture of the belemnite rostrum
Ullmann, C. V., Frei, Robert, Korte, Christoph & Hesselbo, S. P., 5 Jun 2015, In: Geochimica et Cosmochimica Acta. 159, p. 231-243 13 p.Research output: Contribution to journal › Journal article › Research › peer-review
- 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. 439-466Research output: Contribution to journal › Journal article › Research › peer-review
- Published
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
- Published
Algoma-type Neoproterozoic BIFs and related marbles in the Seridó Belt (NE Brazil): REE, C, O, Cr and Sr isotope evidence
Sial, A. N., Campos, M. S., Gaucher, C., Frei, Robert, Ferreira, V. P., Nascimento, R. C., Nascimento, R. C., Pereira, N. S. & Rodler, A., 2015, In: Journal of South American Earth Sciences. 61, p. 33-52 20 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Chemostratigraphy of Neoproterozoic Banded Iron Formation (BIF): Types, Age and Origin
Gaucher, C., Sial, A. N. & Frei, Robert, 2015, Chemostratigraphy: Concepts, Techniques, and Applications. Ramkumar, M. (ed.). Elsevier, p. 433–449Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research › peer-review
- Published
Chromium isotope fractionation during coprecipitation with calcium carbonate
Rodler, A., Sánchez-Pastor, N., Fernández-Díaz, L. & Frei, Robert, 2015. 1 p.Research output: Contribution to conference › Conference abstract for conference › Research
- Published
Coral-based climate records from tropical South Atlantic: 2009/2010 ENSO event in C and O isotopes from Porites corals (Rocas Atoll, Brazil)
Pereira, N. S., Sial, A. N., Kikuchi, R. K. P., Ferreira, V. P., Ullmann, C. V., Frei, Robert & Cunha, A. M. C., 2015, In: Anais da Academia Brasileira de Ciencias.. 87, 4, p. 1939-1957 19 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
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
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
- 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
- Published
Macrofossil calcite: challenges and benefits of heterogeneity
Ullmann, C. V., Korte, Christoph, Frei, Robert & Hesselbo, S. P., 2015, p. p. 61.Research output: Contribution to conference › Conference abstract for conference › Research
- Published
Oxidative release of chromium from Archean ultramafic rocks, its transport and environmental impact – A Cr isotope perspective on the Sukinda valley ore district (Orissa, India)
Paulukat, C. S., Døssing, L. N., Mondal, S. K., Vögelin, A. R. & Frei, Robert, 2015, In: Applied Geochemistry. 59, p. 125-138Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Reading the record: Understanding heterogeneity in macrofossil geochemistry
Ullmann, C. V., Frei, Robert, Korte, Christoph & Hesselbo, S. P., 2015, p. p. 375 .Research output: Contribution to conference › Conference abstract for conference › Research
- Published
Subaerial speleothems and deep karst in central Sweden linked to Hirnantian glaciations
Kröger, B., Ebbestad, J. O. R., Lehnert, O., Ullmann, C. V., Korte, Christoph, Frei, Robert & Rasmussen, Christian Mac Ørum, 2015, In: Journal of the Geological Society - London. 172, 3, p. 349-356 8 p.Research output: Contribution to journal › Journal article › Research › peer-review
- 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
- 2014
- Published
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
- Published
High-resolution Hg Chemostratigraphy: A contribution to the distinction of chemical fingerprints of the Deccan volcan ism and Cretaceous−Paleogene Boundary impact event
Sial, A. N., Chen, J., Lacerda, L. D., Peralta, S., Gaucher, C., Frei, Robert, Cirilli, S., Ferreira, V. P., Marquillas, R. A., Barbosa, J. A., Pereira, N. S. & Belmino, I. K. C., Nov 2014, In: Palaeogeography, Palaeoclimatology, Palaeoecology - An International Journal for the Geo-Sciences. 414, p. 98-115 17 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
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
- 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
- Published
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
- Published
40Ar/39Ar dating of exceptional concentration of metals by weathering of Precambrian rocks at the Precambrian–Cambrian boundary
Parnell, J., Mark, D. F., Frei, Robert, Fallick, A. E. & Ellam, R. M., Jun 2014, In: Precambrian Research. 246, p. 54-63 10 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
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
- Published
Constraints on the origin and evolution of magmas in the Payún Matrú Volcanic Field, Quaternary Andean back-arc of western Argentina
Hernadno, I. R., Aragón, E., Frei, Robert, Gonzáles, P. D. & Spakman, W., Jan 2014, In: Journal of Petrology. 55, 1, p. 209-239 31 p.Research output: Contribution to journal › Journal article › Research › peer-review
- 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
- Published
Integrating bed-by-bed palaeobiological and geochemical proxies through the onset of the Great Ordovician Biodiversification Event on Baltica
Rasmussen, Christian Mac Ørum, Ullmann, C. V., Jakobsen, K. G., Lindskog, A., Hansen, J., Hansen, T., Eriksson, M. E., Dronov, A., Frei, Robert, Korte, Christoph, Nielsen, Arne Thorshøj & Harper, D. A. T., 2014, p. 81.Research output: Contribution to conference › Conference abstract for conference › Research
- Published
Macrofossil Geochemistry: Palaeoenvironmental application
Ullmann, C. V., Pereira, N. S., Frei, Robert & Korte, Christoph, 2014, p. 32.Research output: Contribution to conference › Conference abstract for conference › Research
- Published
The Behaviour of Chromium Isotopes during the Oxidative Weathering of Ultramafic Rocks
Paulukat, C. S., Døssing, L. N., Mondal, S. K., Vögelin, A. R. & Frei, Robert, 2014.Research output: Contribution to conference › Conference abstract for conference › Research › peer-review
- Published
The Neoarchaean Storø Supracrustal Belt, Nuuk region, southern West Greenland: An arc-related basin with continent-derived sedimentation
Szilas, Kristoffer, van Gool, J. A. M., Scherstén, A. & Frei, Robert, 2014, In: Precambrian Research. 247, p. 208–222 15 p.Research output: Contribution to journal › Journal article › Research › peer-review
- 2013
- Published
Remnants of arc-related Mesoarchaean oceanic crust in the Tartoq Group of SW Greenland
Szilas, Kristoffer, van Hinsberg, V. J., Kisters, A. F. M., Hoffmann, J. E., Windley, B. F., Kokfelt, T. F., Scherstén, A., Frei, Robert, Rosing, Minik Thorleif & Münker, C., Mar 2013, In: Gondwana Research. 23, 2, p. 436-451 16 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
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
- Published
Chromium isotope fractionation during oxidative weathering - implications from the study of a Paleoproterozoic (ca. 1.9 Ga) paleosol, Schreiber Beach, Ontario, Canada
Frei, Robert & Polat, A., 2013, In: Precambrian Research. 224, p. 434-453 20 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Chromium isotope record of the Otavi Group, Namibia
Rodler, A., Frei, Robert, Gaucher, C., Vögelin, A. R., Ullmann, C. V. & Korte, Christoph, 2013, In: Mineralogical Magazine. 77, 5, p. 2075 1 p.Research output: Contribution to journal › Conference abstract in journal › Research
- Published
Comment on: “Chemostratigraphic constraints on early Ediacaran carbonate rampdynamics, Río de la Plata craton, Uruguay” by Aubet et al. Gondwana Research, Volume 22, Issues 3-4, November 2012, Pages 1073-1090
Gaucher, C., Sial, A. N., Frei, Robert, Sprechmann, P., Bossi, J., Poiré, D. G., Blanco, G. & Sánchez Bettucci, L., 2013, In: Gondwana Research. 23, 3, p. 1183-1185 3 p.Research output: Contribution to journal › Comment/debate › Research
- Published
Cr(VI)-calcite coprecipitation: implications for the use of Cr isotopes as paleoclimatic proxy
Rodler, A., Dietzel, M. & Frei, Robert, 2013.Research output: Contribution to conference › Conference abstract for conference › Research
- Published
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
- Published
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
- Published
High-resolution stable isotope stratigraphy of the upper Cambrian and Ordovician in the Argentine Precordillera: carbon isotope excursions and correlations
Sial, A. N., Peralta, S., Gaucher, C., Toselli, A. J., Ferreira, V. P., Frei, Robert, Parada, M. A., Pimentel, M. M. & Pereira, N. S., 2013, In: Gondwana Research. 24, 1, p. 330-348 19 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Large Igneous Province volcanism, ocean anoxia and marine mass extinction
Ruhl, M., Bjerrum, Christian J., Canfield, D., Korte, Christoph, Stemmerik, L. & Frei, Robert, 2013, In: Mineralogical Magazine. 77, 5, p. 2097 1 p.Research output: Contribution to journal › Conference abstract in journal › Research
- Published
Mercury as a proxy for volcanic activity during extreme environmental turnover: The Cretaceous-Paleogene transition
Sial, A. N., Lacerda, L. D., Ferreira, V. P., Frei, Robert, Marquillas, R. A., Barbosa, J. A., Gaucher, C., Windmöller, C. C. & Pereira, N. S., 2013, In: Palaeogeography, Palaeoclimatology, Palaeoecology - An International Journal for the Geo-Sciences. 387, p. 153-164 12 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Ocean anoxia and large igneous provinces
Ruhl, M., Bjerrum, Christian J., Canfield, D. E., Korte, Christoph, Stemmerik, L. & Frei, Robert, 2013, In: Geophysical Research Abstracts. 15, 1 p.Research output: Contribution to journal › Conference abstract in journal › Research
- Published
Partial diagenetic overprint of late jurassic belemnites from New Zealand: implications for the preservation potential of δ7Li values in calcite fossils
Ullmann, C. V., Campbell, H. J., Frei, Robert, Hesselbo, S. P., Pogge von Strandmann, P. A. E. & Korte, Christoph, 2013, In: Geochimica et Cosmochimica Acta. 120, p. 80-96 17 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Petrology and geochemistry of the ~2.9 Ga Itilliarsuk banded iron formation and associated supracrustal rocks, West Greenland: source characteristics and depositional environment
Haugaard, R., Frei, Robert, Stendal, H. & Konhauser, K., 2013, In: Precambrian Research. 229, p. 150-176 27 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Preservation potential of δ7Li values in Mesozoic calcite fossils
Ullmann, C. V., Campbell, H. J., Frei, Robert, Hesselbo, S. P., Pogge von Strandmann, P. A. E. & Korte, Christoph, 2013, In: Mineralogical Magazine. 77, 5, p. 2376Research output: Contribution to journal › Conference abstract in journal › Research › peer-review
- Published
Redox effect on the Cr isotope proxy: transitional signal of associated cap-carbonates, BIF and black shale, Chuos Formation (Namibia)
Rodler, A., Frei, Robert & Gaucher, C., 2013.Research output: Contribution to conference › Conference abstract for conference › Research
- 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
- 2012
- Published
Complex calc-alkaline volcanism recorded in Mesoarchaean supracrustal belts north of Frederikshåb Isblink, southern West Greenland: implications for subduction zone processes in the early earth
Szilas, Kristoffer, Hoffmann, J. E., Scherstén, A., Rosing, Minik Thorleif, Windley, B. F., Kokfelt, T. F., Keulen, N., van Hinsberg, V. J., Næraa, T., Frei, Robert & Münker, C., 2012, In: Precambrian Research. 208-211, p. 90-123 34 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
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
- Published
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
- Published
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
- Published
Isotopic studies of human skeletal remains from a sixteenth to seventeenth century AD churchyard in Campeche, Mexico: diet, place of origin, and age
Price, T. D., Burton, J. H., Cucina, A., Zabala, P., Frei, Robert, Tykot, R. H. & Tiesler, V., 2012, In: Current Anthropology. 53, 4, p. 396-433Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Origin of Mesoarchaean arc-related rocks with boninite/komatiite affinities from southern West Greenland
Szilas, Kristoffer, Næraa, T., Scherstén, A., Stendal, H., Frei, Robert, van Hinsberg, V. J., Kokfelt, T. F. & Rosing, Minik Thorleif, 2012, In: Lithos. 144-145, p. 24-39 16 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Paleo- and Neoproterozoic magmatic and tectonometamorphic evolution of the Isla Cristalina de Rivera (Nico Pérez Terrane, Uruguay)
Oyhantçabal, P., Wagner-Eimer, M., Wemmer, K., Schulz, B., Frei, Robert & Siegesmund, S., 2012, In: International Journal of Earth Sciences. 101, 7, p. 1745-1762 18 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Stable Chromium isotopes as tracer for paleoclimatic processes recorded in marine carbonates of the Late Neoproterozoic
Rodler, A., Frei, Robert & Gaucher, C., 2012.Research output: Contribution to conference › Conference abstract for conference › Research
- Published
Stable Chromium isotopes as tracer for paleoclimatic processes recorded in marine carbonates of the Late Neoproterozoic
Rodler, A., Frei, Robert, Gaucher, C., Ullmann, C. V. & Korte, Christoph, 2012, p. 142.Research output: Contribution to conference › Conference abstract for conference › Research
- Published
The 3.1 Ga Nuggihalli chromite deposits, Western Dhawar craton (India): geochemical and isotopic constraints on mantle sources, crustal evolution and implications for supercontinent formation and ore mineralization
Mukherjee, R., Mondal, S. K., Frei, Robert, Rosing, Minik Thorleif, Waight, Tod, Zhong, H. & Kumar, G. R. R., 2012, In: Lithos. 155, p. 392-409 18 p.Research output: Contribution to journal › Journal article › Research › peer-review
- 2011
- Published
Chromium isotopes in carbonates — A tracer for climate change and for reconstructing the redox state of ancient seawater
Frei, Robert, Gaucher, C., Døssing, L. N. & Sial, A. N., 30 Oct 2011, In: Earth and Planetary Science Letters. 312, p. 114–125 12 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
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
- 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
- Published
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
- Published
Mesoproterozoic evolution of the Rio de la Plata Craton in Uruguay: at the heart of Rodinia?
Gaucher, C., Frei, Robert, Chemale, F., Frei, D., Bossi, G., Martinez, G., Chiglino, L. & Cernuschi, F., 2011, In: International Journal of Earth Sciences. 100, 2-3, p. 273-288 16 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
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
- Published
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
- Published
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
- 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
- 2010
- 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
- Published
Compositional variations in the Mesoarchean chromites of the Nuggihalli schist belt, Western Dharwar Craton (India): potential parental melts and implications for tectonic setting
Mukherjee, R., Mondal, S. K., Rosing, Minik Thorleif & Frei, Robert, 2010, In: Contributions to Mineralogy and Petrology. 160, 6, p. 865-885 21 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
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
- Published
New age (ca. 2970 Ma), mantle source composition and geodynamic constraints on the Archean Fiskenæsset anorthosite complex, SW Greenland.
Polat, A., Frei, Robert, Scherstén, A. & Appel, P. W. U., 2010, In: Chemical Geology. 277, 1-2, p. 1-20Research output: Contribution to journal › Journal article › Research › peer-review
- Published
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
- 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. 1199-1226Research output: Contribution to journal › Journal article › Research › peer-review
- 2009
- Published
Cerium Isotope Fractionation during Oxidative Precipitation.
Weber, T., Frei, Robert, Rosing, Minik Thorleif, Canfield, D., Dideriksen, K., Nedel, S., Stipp, S. L. S., Telouk, P. & Albarede, F., 2009. 1 p.Research output: Contribution to conference › Conference abstract for conference › Research
- Published
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
- Published
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
- 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
ID: 11756
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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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