Robert Frei

Robert Frei

Professor

ORCID: 0000-0001-7708-9881

Publication year:
All
101 - 200 out of 379Page size: 100
  1. 2017
  2. 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

  3. 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

  4. 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

  5. 2016
  6. 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. 60-81

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

  7. 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. 24-34

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

  8. 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. 60-73

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

  9. 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. 21-51

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

  10. 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. 68-96

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

  11. 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. 209-230

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

  12. 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

  13. 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

  14. 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. 29-44

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

  15. 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

  16. 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

  17. 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. 89-103

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

  18. 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

  19. 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

  20. 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

  21. 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

  22. 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

  23. 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

  24. 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

  25. 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

  26. 2015
  27. 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

  28. 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

  29. Published

    Was it for walrus? Viking Age settlement and medieval walrus ivory trade in Iceland and Greenland

    Frei, K. M., Coutu, A. N., Smiarowski, K., Harrison, R., Madsen, C. K., Arneborg, J., Frei, Robert, Gudmundsson, G., Sindbaek, S. M., Woollett, J., Hartman, S., Hicks, M. & McGovern, T. H., 27 May 2015, In: World Archaeology. 47, 3, p. 439-466

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

  30. 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

  31. 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

  32. 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. 433–449

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

  33. 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

  34. 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

  35. 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

  36. 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

  37. 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

  38. 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

  39. 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. 125-138

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

  40. 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

  41. 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

  42. 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

  43. 2014
  44. 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

  45. 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

  46. 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

  47. 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

  48. 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

  49. 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

  50. 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

  51. 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

  52. 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

  53. 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

  54. 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

  55. 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

  56. 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

  57. 2013
  58. 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

  59. 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

  60. 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

  61. 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

  62. 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

  63. 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

  64. 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

  65. 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

  66. 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

  67. 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

  68. 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

  69. 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

  70. 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

  71. 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

  72. 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. 2376

    Research output: Contribution to journal › Conference abstract in journal › Research › peer-review

  73. 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

  74. 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

  75. 2012
  76. 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

  77. 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

  78. 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

  79. 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

  80. 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. 396-433

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

  81. 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

  82. 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

  83. 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

  84. 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

  85. 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

  86. 2011
  87. 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

  88. 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

  89. 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

  90. 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

  91. 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

  92. 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. 264-274

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

  93. 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

  94. 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

  95. 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

  96. 2010
  97. 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

  98. 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

  99. 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

  100. 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. 1-20

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

  101. 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

  102. Published

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

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

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

  103. 2009
  104. 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

  105. 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. 334-356

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

  106. 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. 105-124

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

  107. 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. 250-253

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

  108. Published

    Lead-isotope and trace-element geochemistry of Paleoproterozoic metasedimentary rocks in the Lead and Rochford basins (Black Hills, South Dakota, USA): implications for genetic models, mineralization ages, and sources of ore leads for the Homestake gold deposit

    Frei, Robert, Dahl, P. S., Frandsson, M. M., Jensen, L. A., Hansen, T. R., Terry, M. P. & Frei, Karin Margarita, 2009, In: Precambrian Research. 172, 1-2, p. 1-24

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

  109. Published

    On the valency state of radiogenic lead in zircon and its consequences

    Kramers, J., Frei, Robert, Newville, M., Kober, B. & Villa, I., 2009, In: Chemical Geology. 261, p. 4-11

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

Previous 1 2 3 4 Next

ID: 11756