Robert Frei

Robert Frei

Professor

ORCID: 0000-0001-7708-9881

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  1. 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

  2. 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

  3. Published

    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. A194

    Research output: Chapter in Book/Report/Conference proceeding › Conference abstract in proceedings › Research

  4. Published

    Mono-sample Pb-Pb dating of pyrrhotite and tourmaline: Archean vs. Proterozoic gold mineralization in Zimbabwe

    Frei, Robert & Pettke, T., 1996, In: Geology. 24, p. 823-826

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

  5. Published

    Mono-sample Pb-Pb dating of pyrrhotite and tourmaline: Archean vs. Proterozoic gold mineralization in Zimbabwe. A Reply

    Frei, Robert & Pettke, T., 1997, In: Geology. 27, p. 670-671

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

  6. Published

    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

  7. Published

    Mono-sample pb-pb dating of pyrrhotite and tourmaline: Proterozoic vs. Archean intracratonic gold mineralization: reply

    Frei, Robert & Pettke, T., 1 Dec 1997, In: Geology. 25, 7, p. 670-671 2 p.

    Research output: Contribution to journal › Letter › Research › peer-review

  8. Published

    Multi-isotope proveniencing of human remains from a Bronze Age battlefield in the Tollense Valley in northeast Germany

    Price, T. D., Frei, Robert, Brinker, U., Lidke, G., Terberger, T., Frei, K. M. & Jantzen, D., 2019, In: Archaeological and Anthropological Sciences. 11, 1, p. 33-49 17 p.

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

  9. Published

    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

  10. Published

    Multiproxy isotope constraints on ocean compositional changes across the late Neoproterozoic Ghaub glaciation, Otavi Group, Namibia

    Rodler, A., Frei, Robert, Gaucher, C., Korte, Christoph, Rosing, Salik Anders & Germs, G. J. B., 2017, In: Precambrian Research. 298, p. 306-324 19 p.

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

  11. Published

    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. A480

    Research output: Contribution to journal › Conference abstract in journal › Research

  12. Published

    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. 2253-2263

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

  13. Published

    Nd-Sr-Pb isotopic constraints on metal and fluid sources in W-Sb-Au mineralization at Woxi and Liaojiaping (Western Hunan, China)

    Peng, B. & Frei, Robert, 2004, In: Mineralium Deposita. Vol. 39, p. 313-327

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

  14. Published

    Nd-Sr-Pb isotopic geochemistry of scheelite from the Woxi W-Sb-Au deposit, Eastern Hunan: implicarions for sources and evolution of ore-forming fluids

    Peng, B., Frei, Robert & Xianglin, T. T., 2006, In: Acta Geologica Sinica - English Edition. 80, p. 561-570

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

  15. Published

    Neoproterozoic to Early Palaeozoic events in the Sierra de San Luis: implications for the Famatinian geodynamics in the Eastern Sierras Pampeanas (Argentina)

    Steenken, A., Siegesmund, S., Lopez de Luchi, M., Frei, Robert & Wemmer, K., 2006, In: Geological Society of London Special Publications. 163, p. 965-982

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

  16. Published

    New 207Pb-206Pb and 40Ar-39Ar ages from SW Montana, USA: constraints on the Proterozoic and Archean tectonic and depositional history of the Wyoming Province

    Roberts, H., Dahl, P., Kelly, S. & Frei, Robert, 2002, In: Precambrian Research. 117, p. 119-143

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

  17. Published

    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

  18. 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

  19. Published

    New evidence for 2.01 Ga rifting of the easternmost Wyoming craton (Black Hills, SD): implications for break-up of a supercraton (Superia)

    Hark, J. S., Frei, Robert, Whitehouse, M. J. & Dahl, P. S., 2008, Geological Society of America Abstracts with Programs. Vol. 40(6). p. 145-170

    Research output: Chapter in Book/Report/Conference proceeding › Conference abstract in proceedings › Research

  20. Published

    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. 24’677-24’689

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

  21. 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

  22. 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

  23. Published

    On the formation of peridotite-derived Os-rich PGE alloys

    Brenker, F. E., Meibom, A. & Frei, Robert, 2003, In: American Mineralogist. 88, p. 1731-1740

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

  24. 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

  25. 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

  26. Published

    Origin and metallogenetic significance of the Tertiary Stratoni "Granodiorite", Chalkidiki, N. Greece: isotopic and chemical evidence

    Kalogeropoulos, S. I., Frei, Robert, Nikolaou, M. & Gerouki, F., 1990, In: Bulletin of the Geological Society of Greece. 26, p. 23-38

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

  27. 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

  28. Published

    Origin of hexavalent chromium in groundwater: the example of Sarigkiol Basin, Northern Greece

    Kazakis, N., Kantiranis, N., Kalaitzidou, K., Kaprara, M., Mitrakas, M., Frei, Robert, Vargemezis, G., Tsourlos, P., Zouboulis, A. & Filippidis, A., 2017, In: Science of the Total Environment. 593-594, p. 552-566 15 p.

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

  29. Published

    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. A605

    Research output: Contribution to journal › Journal article › Research

  30. Published

    Origins of inhabitants from the 16th century Sala (Sweden) silver mine cemetery – a lead isotope perspective

    Price, T. D., Frei, Robert, Bäckström, Y., Frei, K. M. & Ingvarsson-Sundstrom, A., 2017, In: Journal of Archaeological Science. 80, p. 1-13 13 p.

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

  31. Published

    Os isotope heterogeneity of the convecting upper mantle: The Mayari- Btacoa Ophiolitic Belt (eastern cuba)

    Frei, Robert, Gervilla, F., Meibom, A. & Proenza, J. A., 2006, In: Earth and Planetary Science Letters. 241, p. 466-476

    Research output: Contribution to journal › Journal article › Research

  32. Published

    Os isotope heterogeneity of the upper mantle: Evidence from the Mayarí-Baracoa ophiolite belt in eastern Cuba

    Frei, Robert, Gervilla, F., Meibom, A., Proenza, J. A. & Garrido, C. J., 31 Jan 2006, In: Earth and Planetary Science Letters. 241, 3-4, p. 466-476 11 p.

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

  33. Published

    Os isotope systematics of Mesoarchean chromitite - PGE deposits in the Singhbhum Craton (India): implications for the evolution of subcontinental lithospheric mantle

    Mondal, S. K., Frei, Robert & Ripley, E. M., 2007, In: Chemical Geology. 244, p. 391-408

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

  34. Published

    Osmium and helium isotopic evidence against the standard stratification model of Earth's mantle

    Meibom, A., Anderson, D. L., Sleep, N. H., Frei, Robert, Chamberlain, C. P., Hren, M. T. & Wooden, J. L., 2003, In: Earth and Planetary Science Letters. 208, p. 197-204

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

  35. Published

    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. 83-92

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

  36. Published

    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. F966

    Research output: Contribution to journal › Journal article › Research

  37. Published

    Osmium isotopes in the Wiedemann Fjord mantle xenoliths: A unique record of cratonic mantle formation by melt depletion in the Archaean

    Hanghøj, K., Kelemen, P., Bernstein, S., Blusztajn, J. & Frei, Robert, 2001, In: Geochemistry, Geophysics and Geosystem. 2

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

  38. Published

    Osmium isotopic compositions of Os-rich platinum group element alloys from the Klamath and Siskiyou Mountains

    Meibom, A., Frei, Robert & Sleep, N. H., 10 Feb 2004, In: Journal of Geophysical Research: Solid Earth. 109, 2

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

  39. Published

    Osmium isotopic compositions of Os-rich platinum group element alloys from the Klamath and Siskiyou Mountains, USA

    Meibom, A., Frei, Robert & Sleep, N. H., 2004, In: Journal of Geophysical Research - Oceans. Vol. 109, p. B02203

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

  40. 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

  41. 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

  42. 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

  43. 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

  44. Published

    Oxygenation variations in the atmosphere and shallow seawaters of the Yangtze Platform during the Ediacaran Period: Clues from Cr-isotope and Ce-anomaly in carbonates

    Wei, W., Frei, Robert, Gilleaudeau, G. J., Li, D., Wei, G., Chen, X. & Ling, H., 2018, In: Precambrian Research. 313, p. 78-90 13 p.

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

  45. 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

  46. Published

    Pan-African(?) rutile in the Yaoundé region, Cameroon

    Stendal, H., Toteu, S. F., Frei, Robert, Njel, U. O., Konnerup-Madsen, J., Bassahak, J., Penaye, J. & Nni, J., 2004, 20th Colloquium of African geology, Orleans, France, 2-7 June 2004. Abstract volume. Orleans, p. 385

    Research output: Chapter in Book/Report/Conference proceeding › Preface/postscript › Research

  47. 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

  48. Published

    Pb stepwise leaching (PbSL) dating of garnet: addressing the inclusion problem

    Schaller, M., Steiner, O., Studer, I., Frei, Robert & Kramers, J. D., 1997, In: Schweizerische Mineralogische und Petrographische Mitteilungen. 77, p. 113-121

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

  49. Published

    Pervasive early diagenetic dolomitization, subsequent hydrothermal alteration, and late stage hydrocarbon accumulation in a Middle Triassic carbonate sequence (Szeged Basin, SE Hungary)

    Garaguly, I., Varga, A., Raucsik, B., Schubert, F., Czuppon, G. & Frei, Robert, 2018, In: Marine and Petroleum Geology. 98, p. 270-290 21 p.

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

  50. Published

    Petrogenesis and geodynamic setting of the Neoarchaean Haines Gabbroic Complex and Shebandowan greenstone belt, southwestern Superior Province, Ontario, Canada

    Sotiriou, P., Polat, A. & Frei, Robert, 2019, In: Lithos. 324-325, p. 1-19 20 p.

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

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