Dr. Elis Hoffmann

Kontakt

Poppelsdorfer Schloss
Raum 103
Telefon: +49 228 73-7967
E-Mail: hoffjoel [at] uni-bonn.de

Scientific Career and Education

Main research interests

• Hf-Nd isotope constraints on the early Earth's mantle-crust evolution
• High-field-strength-element (HFSE) systematics of Archean rocks
• Petrogenesis of the Archean Tonalite-Trondhjemite-Granodiorite (TTG) suite
• Archean Greenstone belts and anorthosite complex
• Petrogenesis of the Isua Supracrustal Belt
• Intra-crustal differentiation processes
• Petrogenesis of the Ancient gneiss complex (Swaziland) and the Barberton area (South Africa)
• Modern arc basalts

Expeditions and field trips

• 2011 South Africa and Swaziland (3 weeks)
• 2010 Isua and Nuuk region, Greenland (3 weeks)
• 2010 South Africa and Swaziland (4 weeks)
• 2007 Isua, Greenland (2 weeks)
• 2007 Nuùk region, Greenland (5 weeks)
• 2006 Nuùk region, Greenland (4 weeks)
• 2005 Nuùk region, Greenland (6 weeks)

Society affiliations

• Deutsche Mineralogische Gesellschaft (DMG)
• Geochemical Society
• American Geophysical Union

Publikationen

Peer reviewed articles

• Næraa, T., Scherstén, A., Rosing, M.T., Kemp, A.I.S., Hoffmann, J.E., Kokfelt, T.F., Whitehouse, M.J. (2012) Hafnium isotope evidence for a transition in the geodynamics of continental growth after 3.2 Ga. Nature 485, 627-630.
• Hoffmann, J.E., Svahnberg, H., Piazolo, S., Scherstén, A., Münker, C. (2012) The geodynamic evolution of Mesoarchean anorthosite complexes inferred from the Naajat Kuuat Complex, southern West Greenland. Precambrian Research 196-197, 149-170. DOI: 10.1016/j.precamres.2011.12.002.
• Szilas, K., Hoffmann, J.E., Scherstén, A., Rosing, M.T., Windley, B.F., Kokfelt, T.F., Keulen, N., van Hinsberg, V.J., Næraa, T., Frei, R., Münker, C. (2012) Complex calc-alkaline volcanism recorded in Mesoarchaean supracrustal belts north of Frederikshåbs Isblink, southern West Greenland: implications for subduction zone processes in the early Earth. Precambrian Research 208-211, 90-123.
• Nagel, T.J., Hoffmann, J.E., Münker, C. (2012) Generation of Eoarchean TTGs from thickened mafic arc crust. Geology 40, 375-378. DOI: 10.1130/G32729.1
• Szilas, K., Van Hinsberg, V.J., Kisters, A.F.M., Hoffmann, J.E., Kokfelt, T.F., Scherstén, A., Windley, B.F., Münker, C. (2012): Remnants of arc-related Mesoarchaean oceanic crust  of the Tartoq Group, SW Greenland. Gondwana Research 208-211, 90-123.DOI: 10.1016/j.gr.2011.11.006.
• Hoffmann, J.E., Münker, C.,Polat A., Rosing, M.T., Schulz, T. (2011) The origin of decoupled Hf-Nd isotope compositions in Eoarchean rocks from southern West Greenland. Geochimica et Cosmochimica Acta 75, 6610-6628
• Hoffmann, J.E., Münker, C., Næraa, T., Rosing, M.T., Herwartz, D., Garbe-Schönberg, D., Svahnberg, H. (2011) Mechanisms of Archean crust formation inferred from high-precision HFSE systematics in TTGs. Geochimica et Cosmochimica Acta. 75, 4157-4178. DOI: 10.1016/j.gca.2011.04.027
• Hoffmann, J.E., Münker, C., Polat, A., König, S., Mezger, K., Rosing, M.T. (2010): Highly depleted Hadean mantle reservoirs in the sources of early Archean arc-like rocks, Isua supracrustal belt, southern West Greenland. Geochimica et Cosmochimica Acta 74, 7236-7260. DOI:10.1016/j.gca.2010.09.027
• John, T., Klemd, R., Klemme, S., Pfänder, J., Hoffmann, J.E., Gao, J. (2011): Nb-Ta fractionation by partial melting at the titanite-rutile transition. Contributions to Mineralogy and Petrology 161, 33−45 DOI: 10.1007/s00410-010-0520-4
• König, S.; Münker, C.; Schuth, S.; Luguet, A.; Hoffmann, J.E.; Kuduon, J. (2010): Boninites as windows into trace element mobility in subduction zones. Geochimica Cosmochimica Acta 74, 684-704.

Other publications

• Hoffmann, J.E. (2011) The development of the mantle-crust system in the early Archean. Ph.D. thesis, Universität Bonn, pp. 152.
• Næraa, T., Rosing, M.T., Hoffmann, J.E., Scherstén, A., Kemp, A.I.S., Kokfelt, T.F. (2011) Eoarchaean TTG formation from Hadean proto-crust. Constraints from U/Pb/Hf/O isotopes in zircons: Nuuk region, southern West Greenland. In: Næraa, T. (2011): Zircon U/Pb, Hf and O isotope systematics from the Archaean basement in the Nuuk region, southern West Greenland – Constraints on the early evolution of the continental crust. Ph.D. thesis, University of Copenhagen. 195 pp.
• Næraa, T., Hoffmann, J.E., Kokfelt, T.F., Scherstén, A., Rosing, M.T., Kemp, A.I.S. (2011) Subduction related formation of Mesoarchaean continental crust. Insights from zircon U/Pb/Hf/O isotopes; Nuuk region, southern West Greenland. In: Næraa, T. (2011) Zircon U/Pb, Hf and O isotope systematics from the Archaean basement in the Nuuk region, southern West Greenland – Constraints on the early evolution of the continental crust. Ph.D. thesis, University of Copenhagen. 195 pp.
• Solgevik, H., Hoffmann, J.E., Scherstén, A. (2008) Geochemical characteristics of mafic and ultramafic rocks from the Naujat anorthosite complex, SW Greenland. Mineral resource assessment of the Archaean Craton (66° to 63°30’N) SW Greenland Contributions 7. Danmarks og Grønlands Geologiske Undersøgelse Rapport 2008/3.
•  Rehnström, E.F. (Compiler; 2011) Geological map of Greenland 1:100 000, Kapisillit 64 V.2 Syd. Copenhagen. Geological Survey of Denmark and Greenland.
• Printed: Laursen Grafisk A/S, Denmark 2011. (participated as mapper in 3 field seasons).
   

Conference abstracts

Hoffmann, J.E., Kröner, A., Hegner, E., Hofmann, A., Münker, C. (2012) Hf-Nd isotope constraints on the formation of the Ancient gneiss complex, Swaziland. BRICS Conference Johannesburg.

•  Kröner, A., Hoffmann, J.E., Xie, H., Wu, F., Münker, C., Hegner, E., Wong, J., Wan, Y., Liu, D. (2012) Generation of early Archaean felsic greenstone volcanic rocks and tonalite-trondhjemite gneisses through crustal melting in the eastern Kaapvaal craton, southern Africa. BRICS Conference Johannesburg.
•  Hoffmann, J.E., Kröner, A., Hegner, E., Hofmann, A., Münker, C. (2012) Hf-Nd constraints on the early Archaean evolution of the Ancient Gneiss Complex, Swaziland. EMC2 conference, Frankfurt.
• 31) Herwartz, D., Münker, C., Tütken, T., Hoffmann, J.E., Wittke, A., Barbier, B. (2012) Fossil bones in action – uptake, loss and redistribution of REE and Hf. EMC2 conference, Frankfurt.
• Viemann, S., Bau, M., Hoffmann, J.E., Münker, C. (2012) Evidence for hydrothermal and detrital origin of REY in early Proterozoic Krivoy Rog BIFs, Ukraine. GV Meeting, Hamburg.
• Hoffmann, J.E., Münker, C., Nagel, T.J., Næraa, T., Polat, A., Rosing, M.T. (2012) Building Eoarchean crust - the arc tholeiite-TTG connection. Geological Magazine, Goldschmidt Conference, Montreal. (invited)
• Næraa, T., Scherstén, A., Rosing, M.T., Kemp, A.I.S., Hoffmann, J.E., Kokfelt, T.F., Whitehouse, M.J. (2012) Hf isotope evidence for a transition in the geodynamics of continental growth after 3.2 Ga. Geological Magazine, Goldschmidt Conference, Montreal.
• Szilas, K., Hoffmann, J.E., Scherstén, A. (2012) Complex calc-alkaline volcanism recorded in Mesoarchaean supracrustal belts in SW Greenland: implications for subduction zone processes in the early Earth. Geological Magazine, Goldschmidt Conference, Montreal.
• Cutts, C.A., Stevens, G., Hoffmann, J.E., Buick, I., Frei, D., Münker, C. (2012) P-T modelling and geochronology of the Barberton Granite Greenstone Belt, South Africa: Implications for tectonic models of Archaean crustal formation. International Geological Congress, Brisbane.
• Hoffmann, J.E., Münker, C., Nagel, T.J., Næraa, T., Polat, A., Rosing, M.T. (2012) The tholeiite-TTG connection during Eoarchean crust formation in Isua, southern West Greenland: the role of subduction processes. Geophysical Research Abstracts Vol. 14, EGU2012-8217, 2012, EGU General Assembly, Vienna.
• Nagel, T.J., Hoffmann, J.E., Münker, C. (2012) Eoarchean TTGs derived from mafic arc crust. Geophysical Research Abstracts Vol. 14, EGU2012, 2012, EGU General Assembly, Vienna.
• Cutts, K.A., Stevens, G., Hoffmann, J.E., Buick, I.S., Frei, D. (2012) P/T modelling and geochronology of the Barberton granite-greenstone belt, South Africa. IMSG meeting, Johannesburg.
• Hoffmann, J.E., Nagel, T., Münker, C. (2011) Evidence for Eoarchean TTG formation by melting of thickened arc crust. IGCP-SIDA launch meeting. Merkrjiärvi, Finland.
• Hoffmann, J.E., Nagel, T.J., Münler, C.(2011) Eoarchean TTG formation by melting of thickened mafic arc crust. Geological Magazine. Goldschmidt Conference 2011, Prague.
• Viemann, S., Hoffmann, J.E., Münker, C., Alexander, B.W., Bau, M. (2011): Seawater-derived REY and HFSE systematics in Archean BIFs. Geological Magazine. Goldschmidt Conference 2011 in Prague.
• Næraa, T., Rosing, M., Scherstén, A., Hoffmann, J.E., Kokfelt, T.F., Kemp, T. (2011): Eo- to Mesoarchaean crust formation in the Nuuk region, southern West Greenland. Constrains from combined U/Pb, Hf and O isotopes in zircon. Geophysical Research Abstracts Vol. 13, EGU2011-13670-1, 2011. EGU General Assembly, Vienna.
• Szilas, K., Scherstén, A., Hoffmann, J.E., Kokfelt, T.F., van Hinsberg, V.J., Windley, B.F., Münker, C. (2011) Linking the Ravns Storø and Bjørnesund supracrustal belts (SW Greenland) using Lu-Hf and Sm-Nd isotopic data and whole-rock geochemistry. Geophysical Research Abstracts Vol. 13, EGU2011-11114-1, 2011. EGU General Assembly, Vienna.
• Hoffmann, J.E., Münker, C., Polat, A., Rosing, M.T. (2010): Decoupling of Hf-Nd isotope ratios in early Archean rocks from southern West Greenland - primary, or secondary disturbance? AGU Fall Meeting in San Francisco.
• Hoffmann, J.E., Münker, C., Polat A., Rosing, M.T., Garbe-Schönberg, D. (2010): Archean TTG formation and early intracrustal differentiation inferred from HFSE systematics. DMG meeting in Münster.
• Viehmann, S., Hoffmann, J.E., Münker, C., Alexander, B., Bau, M. (2010): Seawater derived REE + Y and HFSE systematics of Archean Banded Iron Formations (BIFs). DMG meeting in Münster.
• Hoffmann, J.E., Münker, C., Næraa, T., Rosing, M.T., Garde, A.A., Garbe-Schönberg, D. (2010): Archean crust formation inferred from high-precision HFSE systematics in TTGs. DMG Geochemistry meeting in Berlin.
• Hoffmann, J.E., Münker, C., Næraa, T., Rosing, M.T., Garde, A.A., Herwartz, D., Garbe-Schönberg, D. (2010): Formation of TTGs inferred from high-precision HFSE systematics. In: Hofmann, A. et al. (Ed.). Excursion Guide and Abstract Volume. Field workshop for the Crustal Development of the north-eastern Kapvaal Craton, Swazland and South Africa. Paulpietersburgh and Elzuwini.
• Næraa, T., Scherstén, A., Hoffmann, J.E., Kemp, A.I.S. (2010): Combined zircon U-Pb-Hf-O analyses from Archaean TTG gneisses in southern west Greenland. 5AIS meeting in Perth.
• Hoffmann, J.E., Münker, C; Polat, A.; König, S.; Mezger, K.; Rosing, M.T. (2009): Strongly depleted mantle sources in early Archean arc-like rocks from Isua, SW-Greenland. GV Annual meeting. H. von Eynatten, J. Reitner, G. Wörner (Eds.). pp. 62-63., Universitätsverlag Göttingen.
• Klemme, S., John, T., Klemd, R., Pfänder, J., Hoffmann, J.E.(2009): Some comments on the fractionation of Nb from Ta during partial melting of titanite and rutile-bearing metabasalts in subduction zones. Annual Meeting 2009 of the Mineralogical Society. MAPT meeting in Edinburgh. Abstract volume p. 132
• John, T.; Klemd, R.; Klemme, S.; Pfänder, J.; Hoffmann, J.E. (2009): Separating the twins: Nb-Ta fractionation by partial melting at the titanite-rutile transition. DMG meeting 2009.
• Hoffmann, J.E., Münker, C., Rosing, M.T., Næraa, T., Garde, A.A., Garbe-Schönberg, D. (2009): The Origin of TTGs inferred from high-precision HFSE measurements. Geochimica et Cosmochimica Acta 73, A540.
• König, S., Münker, C., Schuth, S., Luguet, A., Hoffmann, J.E., Kuduon, J. (2009): Boninites as Monitors of Subarc Enrichment Processes in Subduction Zones. Geochimica et Cosmochimica Acta 73.
• Hoffmann, J.E., Münker, C., Polat, A., König, S., Mezger, K. (2008): Evidence for Hadean mantle depletion from 3.7-3.8 Ga metabasalts from Isua, SW-Greenland, DMG meeting 2008.
• Hoffmann, J.E., Münker, C., Polat, A., König, S., Mezger, K. (2008): Highly depleted mantle sources of ~3.75 Ga mafic rocks in the early Archean from Isua, SW- Greenland. Geochimica et Cosmochimica Acta, 72, 12S, A384.
• Hoffmann, J.E., Münker, C., Polat, A., Mezger, K. (2007): Evidence for Hadean mantle depletion in the sources of ~3.75 Ga subduction-related rocks, Isua, SW Greenland. Geochimica et Cosmochimica Acta Vol. 71(15), Suppl. 1, A 410.
• Hoffmann, J.E., Münker, C., Polat, A., Mezger, K. (2006): Hf-Nd constraints on the sources of 3.7 Ga old subduction related rocks, Isua, Greenland. Berichte der Deutschen Mineralogischen Gesellschaft: 1, 2004 (Supplement to Eur.J.Mineral. / Beiheft zu Eur.J.Mineral., Vol. 18).
• Hans, U., Hansmann, J., Hoffmann, J.E., Janßen, A., Niedermeier, D., Putnis, A., Vinograd, V. (2005): Thermodynamics of pyrope-majorite solid solution based on static lattice energy calculations. Berichte der Deutschen Mineralogischen Gesellschaft: 1, 2004 (Supplement to Eur.J.Mineral. / Beiheft zu Eur.J.Mineral., Vol. 17).
• Hoffmann, J.E., Holzheid, A., Köpke, J., Berndt, J. (2004): Separation silikatischer Phasen mit Hilfe eines Zentrifugenofens: Erste Ergebnisse. Berichte der Deutschen Mineralogischen Gesellschaft: 1, 2004 (Supplement to Eur.J.Mineral. / Beiheft zu Eur.J.Mineral., Vol. 16).

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