Dr. rer. nat. Elis Hoffmann

elis_01

Geochemistry (Arbeitsbereich Geochemie)

Research Scientist, Manager TIMS and Clean Lab

Address Malteserstr. 74-100
Room 218, Building B
12249 Berlin
Telephone +49 30 838 71 588
Email jeh@zedat.fu-berlin.de

Office hours

Research Interests

Evolution of Earth's mantle through time

Formation and differentiation of the continental crust

Geochronology combined with metamorphic petrology

Archean geodynamics

Komatiites and Archean basalts

Granitoid petrogenesis

Grants

German Science Foundation (DFG) research grant (HO4794/1-1; PI) in collaboration with Prof. Dr. Alfred Kröner (Universität Mainz; Co-PI).

German Science Foundation (DFG) research grant (HO4794/1-2; PI) in collaboration with Prof. Dr. Alfred Kröner (Universität Mainz; Co-PI). Proposal attached to the DFG priority program ‘Building a habitable Earth’ SPP1833

Education

2011   Dr. rer. nat. (Mineralogy/Geochemistry, magna cum laude)

          Dissertation: „The development of the mantle-crust system in the early Archean“  

          Advisor: Prof. Dr. Carsten Münker

2007   Master of Science (mit Auszeichnung), Institut für Mineralogie, Universität Münster,

          Advisor: Prof. Dr. Klaus Mezger, Prof. Dr. Carsten Münker

          M.Sc. thesis title: „Geochemische Untersuchungen an archaischen

          Gesteinen aus SW-Grönland"

2004   Bachelor of Science, Institut für Mineralogie, Universität Münster,

          Advisors: Prof. Dr. Astrid Holzheid, Dr. Jasper Berndt

          B.Sc. thesis title: "Separation silikatischer Phasen mit Hilfe eines Zentrifugenofens"

Professional Experience

2015-present   Lecturer (Akademischer Rat) and Lab Manager at Freie Universität Berlin

2014-2015       Post-doctoral researcher Freie Universität Berlin

2012-2013       Post-doctoral researcher („Eigene Stelle) at the Institut für Geologie

                      und Mineralogie, Universität zu Köln

2011-2012       Post-doctoral researcher at the Steinmann-Institut, Universität Bonn

2008-2011       PhD student at the Steinmann Institut, Universität Bonn

2007               Postgraduate Research Assistant at the Steinmann Institut,Universität Bonn

2005-2007       Mapping Geologist during the summer field seasons for the Geological Survey

                      of Denmark and Greenland (GEUS)

Thesis Co-Supervision

Ph.D. theses

Ongoing projects

Ongoing projects Dipl. Geol. Julia van der Löcht (Universität zu Köln) –

Project on Eoarchean peridotites from southern West Greenland

(co-advisor Carsten Münker)

M.Sc. Kathrin Schneider (Freie Universität Berlin) – Project on mafic and ultramafic rocks

from the Ancient Gneiss Complex (Swaziland) and the Barberton Greenstone Belt

(South Africa)

M.Sc. theses / Diploma theses

2015        Christian Marien (Universität zu Köln): The Petrogenesis of oceanic plagiogranites

               from Cyprus (co-advisor Carsten Münker)

2014        Emmanuel Musese (Universität zu Köln): Geochemical investigations on

               Paleoarchean Greenstones from the Dwalile, Swaziland

               (co-advisor Carsten Münker)

2013        Nils Suhr (Universität Mainz) – Petrography, petrology, as well as zircon and garnet

               geochronology of Archaean granulites from Swaziland, southern Africa

               (co-advisor Alfred Kröner)

2013        Sebastian Schröder (Universität Mainz) – Petrography, Petrology and

               Geochronology of Archaean rocks of the Ancient Gneiss Complex, Swaziland

               (co-advisor Alfred Kröner)

2010        Sebastian Viehmann

               (Universität Bonn, now Ph.D. student at Jacobs University, Bremen)

               Seawater-derived REY, trace element and HFSE systematics of

               Archean Banded Iron Formations (BIFs)

               (co-advisor Carsten Münker)

2010        Christina Hansmeier (Universität Bonn, now Ph.D. student in Hydrogeology at Bonn)

               Geochemische Untersuchungen an Grünsteinen aus der Süd-Ameralik Region,

               SW Grönland

               (co-advisor Carsten Münker)

B.Sc. theses

Ongoing projects

2013        Magda Patyniak – Geochemical investigations on Komatiites and Tholeiites from the

               Komatii Formation, South Africa (supervised together with Carsten Münker)

2013        Jonas Tusch – Lu-Hf garnet geochronology on granulites from the Helge penisnula

               of the Skjoldungen Alkaline Province, Southeast Greenland

               (co-advisor Carsten Münker)

Invited Talks

04/2016    SPP1833 Initial training workshop, Cologne

08/2015    Goldschmidt Conference Prague, Invited talk in session 22d: Mantle

                Thermal Peaks, Crustal Growth and the Inception of Plate Tectonics

02/2014    Institute colloquium, University of Durham, UK

08/2013    Institute seminar, Freie Universität Berlin

05/2013    NASA Astrobiology Institute online workshop

               “Without walls – the  Hadean Earth-Moon system”

05/2013    Institute colloquium, University of Kiel

09/2012    Chinese Academy of Science (CAS), Beijing

09/2012    Beijing SHRIMP Center, Chinese Academy of Geological Science (CAGS), Beijing

06/2012    Goldschmidt Conference Montreal, Canada, Invited talk in session 2b:

                The first billion years: assessing the geological record

07/2012    Institute seminar, University of Johannesburg

05/2012    Institute colloquium, Universität Göttingen

01/2012    Institute seminar, TU Berlin


International Field Work

2015         South Africa and Swaziland (AGC, Barberton; 2 weeks)

2013         South Africa (Barberton, Limpopo), Swaziland (AGC; 3 weeks)

2012         South Africa and Swaziland (AGC, Barberton; 2 weeks)

2011         South Africa and Swaziland (AGC, Barberton, Bushveld complex,

                Vredevoort Impact structure, Johannesburg region; 3 weeks)

2010         Isua and Nuùk region, Greenland (3 weeks)

2010         South Africa and Swaziland (AGC, Barberton; Natal; 4 weeks)

2007         Isua and Nuùk region (7 weeks)

2006         Nuùk region (4 weeks)

2005         Nuùk region (6 weeks)

Services to the Earth Science Community

Journal and proposal reviewer for:

Earth and Planetary Science Letters, Chemical Geology, Precambrian Research (multiple), Lithos, Gondwana Research (multiple), Special Publications of the Geological Society of London (multiple), American Journal of Science (multiple), International Journal of Earth Science, Geologica Acta, Chemie der Erde (multiple) – Geochemistry (multiple), Geoscience Frontiers, Journal of Earth System Science, International Journal of Earth Science and the National Science Foundation (NSF), Contributions to Mineralogy and Petrology

2016             Session co-convener at the Geological Congress in Cape Town for

                    Session: Secular change in Earth evolution

2015             Session co-convener at the EGU meeting in Vienna for Session GMPV2.1:
                    Earth's early crust: petrological and geochemical perspectives

                    (co-sponsored by the VGP section of AGU)

Since 2014    Early Career Scientist Programme Committee of DFG-SPP 1833

                    "Building a Habitable Earth"

2014             Session co-convener at Goldschmidt Conference 2014 in Sacramento

                    for Session 03b: Origin and Evolution of Earth’s Ancient Crust

2013             Session convener at the Goldschmidt 2013 in Florence for Session 03b:

                    Geodynamics and Crust Formation in the Archean – Palaeoproterozoic

2011-2013     Member of the ‘Theme Team’ for the ‘Early Earth Sessions’

                    of Goldschmidt 2013 in Florence

Society and project affiliations

  • Geochemical Society
  • German Mineralogical Society (DMG)
  • American Geophysical Union
  • European Geoscience Union
  • UNESCO IGCP-SIDA project 599 “The changing early Earth”
  • SPP1833 / project HO4794/1-2 attached to the priority program

 

 

Geochronologie – Vorlesung + Übung/Laborpraktikum

Plasmaquellenmassenspektrometrie – Vorlesung + Übung + Laboraktikum

Erde 1 – Praktikum Gesteinskunde

Erde 2 (Magmatische und Metamorphe Prozesse) – Vorlesung + Übung

Advances in Geochemistry - Seminar

Daten, Interpretation und Modellierungen in der Geochemie

How to write publish and present scientific work - Seminar

Publications

*Ph.D., M.Sc and B.Sc. students marked in italics

2016

31. Hoffmann, J.E., Wilson, A.H. (2016) The origin of highly radiogenic Hf isotope compositions in 3.33 Ga Commondale komatiite lavas (South Africa). Chemical Geology, doi: 10.1016/chemgeo.2016.10.010 (in press)

30. Szilas, K., Hoffmann, J.E., Schulz T., Hansmeier, C., Polat, A., Viehmann, S., Kasper, H.U. & Münker, C. (2016). Combined bulk-rock Hf- and Nd-isotope compositions of Mesoarchaean metavolcanic rocks from the Ivisaartoq Supracrustal Belt, SW Greenland: Deviations from the mantle array caused by crustal recycling. Chemie der Erde (in press).

29. Szilas, K., Tusch, J., Hoffmann, J.E., Garde, A.A. & Münker, C. (2016). Hafnium isotope constraints on the origin of Mesoarchaean andesites in southern West Greenland, North Atlantic craton. In: Halla, J., Whitehouse, M. J., Ahmad, T. & Bagai, Z. (eds) Crust–Mantle Interactions and Granitoid Diversification: Insights from Archaean Cratons. Geological Society, London, Special Publications, 449 (in press).

28. Siedenberg, K., Strauss, H., Hoffmann, J.E. (2016) Multiple sulphur isotope signature of early Archean oceanic crust, Isua (SW-Greenland). Precambrian Research 283, 1-12.

27. Kröner, A., Anhauesser, C.R., Hoffmann, J.E., Hegner, E., Wong, J., Geng, H., Xie, H., Yang, J., Liu, D. (2016) Chronology of the oldest supracrustal sequences of the Barberton Greenstone Belt, South Africa and Swaziland. Precambrian Research 279, 123-143.

26. Hoffmann, J.E., Kröner, A., Hegner, E., Viehmann, S., Xie, H., Iiacheri, L.M., Schneider, K.P., Hofmann, A., Wong, J., Geng, H., Yang, JH (2016) Source composition, fractional crystallisation and magma mixing processes of the 3.48-3.43 Ga Tsawela tonalite suite (Ancient Gneiss Complex, Swaziland) – implications for Palaeoarchean geodynamics. Precambrian Research 276, 43-66.

25. van Acken, D., Hoffmann, J.E., Schorscher, H.J.D., Schulz, T., Heuser, A., Luguet, A. (2016) Formation of High-Al komatiites from the Mesoarchaean Quebro Osso Group, Minas Gerais, Brazil: trace elements, HSE systematics and Os isotopic signatures. Chemical Geology 422, 108-121.

2015

24. Viehmann, S., Bau, M., Hoffmann, J.E., Münker, C. (2015) Geochemistry of the Krivoy Rog Banded Iron Formation, Ukraine, and the impact of peak episodes of increased global magmatic activity on the trace element composition of Precambrian seawater. Precambrian Research 270, 165-180.

23.  Szilas, K., Hoffmann, J.E., Hansmeier, C., Hollis, J.A., Münker, C., Viehmann, S., Kasper, H.U. (2015). Nd-Hf isotope and trace element systematics of Mesoarchaean amphibolites, inner Ameralik fjord, southern West Greenland. Mineralogical Magazine 79, 857-876.

22. Suhr, N., Hoffmann, J.E., Kröner, A., Schröder, S. (2015) Archaean granulitic Paragneisses from Central Swaziland: Inferences on Paleoarchaean crustal reworking and a complex metamorphic history. Journal of the Geological Society of London 172, 139-152.

2014

21. Van Kranendonk, M.J., Kröner, A., Hoffmann, J.E., Nagel, T.J., Anhaeusser, C. (2014) Just another drip: structural analysis of a proposed Mesoarchean suture from the Barberton Mountain Land, South Africa. Precambrian Research 254, 19-35.

20. Kröner, A., Hoffmann, J.E., Xie, H., Münker, C., Hegner, E., Hofmann, A., Wang, Y. (2014) Generation of early Archaean grey gneisses through crustal recycling in the eastern Kaapvaal craton, southern Africa. Precambrian Research 255, 833-846.

19. Szilas, K., Hoffmann, J.E., Dziggel, A., Münker, C., Rosing, M.T. (2014) Forum comment on ”Eoarchean within-plate basalts from southwest Greenland”. Geology 42, e330.

18. Cutts, K.A., Stevens, G., Hoffmann, J.E., Buick, I., Frei, D., Münker, C. (2014) Paleo- to Mesoarchean polymetamorphism in the Barberton Greenstone Belt: constraints from U-Pb monazite and Lu-Hf garnet geochronology on the tectonic processes that shaped the belt. GSA Bulletin 126, 251-270.

17. Viehmann, S., Hoffmann, J.E., Münker, C., Bau, M. (2014) Decoupled Hf-Nd isotopes in Neoarchean seawater reveal weathering of emerged continents. Geology 42, 115-118.

16. Hoffmann, J.E., Nagel, T.J., Münker, C., Næraa, T., Rosing, M.T. (2014) Constraints on the process of Eoarchean TTG formation in the Itsaq Gneiss Complex, southern West Greenland. Earth and Planetary Science Letters 388, 374-386.

15. Kröner, A., Kovach, V., Belousova, E., Hegner, E., Armstrong, R., Dolgopolova, A., Seltmann, R., Sun, M., Cai, K., Wong, J., Alexeiev, D.V., Hoffmann, J.E., Rytsk, E., Rojas-Agramonte, Y. (2014) Reassessment of continental growth during the accretionary history of the Central Asian Orogenic Belt. Gondwana Research 25, 103-125.

2013

14. Kröner, A., Hoffmann, J.E., Xie, H., Wu, F., Münker, C., Hegner, E., Wong, J., Wan, Y., Liu D. (2013) Generation of early Archaean felsic greenstone volcanic rocks through crustal melting in the Kaapvaal craton, southern Africa. Earth and Planetary Science Letters 381, 188-197.

13. Szilas, K., Hoffmann, J.E., Scherstén, A., Kokfelt, T.F., Münker, C. (2013) Archaean andesite petrogenesis: insights from the Grædefjord supracrustal belt, southern West Greenland. Precambrian Research 236, 1-15.

12. Pittarello, L., Schulz, T., Koeberl, C., Hoffmann, J.E., Münker, C. (2013) Petrography, geochemistry and Hf-Nd isotope evolution of drill core and target rocks from the El’gygytgyn impact crater, NE Chukotka, Arctic Russia. Meteoritics and Planetary Sciences 48, 1160-1198.

11. Szilas, K., Van Hinsberg, V.J., Kisters, A.F.M., Hoffmann, J.E., Kokfelt, T.F., Scherstén, A., Windley, B.F., Münker, C. (2013) Remnants of arc-related Mesoarchaean oceanic crust in of the Tartoq Group, SW Greenland. Gondwana Research 23, 436–451.

10. Herwartz, D., Münker, C., Tütken, T., Hoffmann, J.E., Wittke, A., Barbier, B. (2013) Lu-Hf isotope systematics of fossil biogenic apatite. Geochimica et Cosmochimica Acta 101, 328–343.

 2012

9. 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.

8. 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.

7. Nagel, T., Hoffmann, J.E., Münker, C. (2012) Generation of the Eoarchean tonalite-trondhjemite-granodiorite (TTG) suite from thickened mafic arc crust. Geology 40, 375–378. (article in the research focus of Ali Polat in the same volume).

6. 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.

2011

5. Hoffmann, J.E., Münker, C., Polat, A., Rosing, M.T., Schulz, T. (2011) The origin of decoupled Hf–Nd isotope compositions in early Archean rocks from southern West Greenland. Geochimica et Cosmochimica Acta. 75, 6610–6628.

4. 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.

3. John, T., Klemd, R., Klemme, S., Pfänder J., Hoffmann, J.E., Gao, J. (2011) Nb-Ta fractionation by partial melting at the rutile-titanite transition zone. Contributions to Mineralogy and Petrology 161, 35–45.

2010

2. 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, SW-Greenland. Geochimica et Cosmochimica 74(24), 7236–7260.

1. 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

7. Hoffmann, J.E. (2014) Radio interview with Raul Schrott “Die erste Erde – Geologische Zeitrechnung und erste Kontinente”, Bayern 2, 14th June 2014.

6. Kröner, A., Hoffmann, J.E. (2012) Post-BRICS Excursion: The Barberton granitoid-greenstone terrain, Ancient Gneiss Complex, and Karoo volcanism in South Africa. Excursion Guidebook. 27 pp.

5. Hoffmann, J.E. (2011) The development of the mantle-crust system in the early Archean. Ph.D. thesis, Universität Bonn, pp. 152.

4. 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.

3. 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.

2. 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. (mapping geologist during 3 field seasons).

1. 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.

 

Conference abstracts

2016

62. Schneider, K.P., Hoffmann, J.E., Münker, C., Kröner, A., Patyniak, M. (2016) Granite-greenstone relationships in the oldest mafic rocks of the Barberton Greenstone Belt, South Africa. International Geological Congress (IGC) 2016, Cape Town.

61. Kröner, A, Nagel, T.J.., Hoffmann, J.E., Xie, H., Wong, J., Geng, H., Hegner, E., Liu, X., Hofmann, A., Liu, D., Yang, J. (2016) High-grade metamorphism and crustal melting at ca. 3.2 Ga in the eastern Kaapvaal craton, southern Africa. International Geological Congress (IGC) 2016, Cape Town.

2015

60. Coggon, J., Luguet, A., Lorand, J.-P., Fonseca, R., Appel, P., Mondal, S., Peters, S., Nowell, G., Hoffmann, J.E., (2015). Early Mantle Evolution and the Late Veneer – New Perspectives from Highly Siderophile Elements. AGU Fall meeting, San Francisco.

59. Coggon, J., Luguet, A., Lorand, J.-P., Fonseca, R., Wainwright, A., Appel, P., Hoffmann, J.E., Nowell, G. (2015) Combined Whole-Rock to Nano-Scale Investigations Reveal Contrasting Response of Pt-Os and Re-Os Isotope Systematics During Magmatic and Post-Magmatic Processes (Invited). AGU Fall meeting, San Francisco.

58. Van de Löcht, J., Münker, C., Hoffmann, J.E., Kleinschmidt, Rosing, M.T. (2015) Eoarchean peridotites from southern West Greenland: remnants of Eoarchean mantle or ultramafic cumulates? GeoBerlin meeting, Berlin.

57. Schneider, K., Hoffmann, J.E., Münker, C., Kröner, A. (2015) Are mafic and ultramafic rocks from the lower Onverwacht Group (Barberton Greenstone Belt) crustally contaminated? GeoBerlin meeting, Berlin.

56. Li, C., Becker, H., Puchtel, I.S., Wang, Z., Hoffmann, J.E. (2015) Mixing and homogenization history of the late veneer in the Earth’s mantle: Constraints from S, Se, Te, Ag and Cu in 3.5 Ga Barberton komatiites. GeoBerlin meeting, Berlin.

55. Hoffmann, J.E., Musese, E., Münker, C., Kröner, A. (2015) Hf-Nd and trace element constraints on granitoid-greenstone relationships of the >3.46 Ga Dwalile Greenstone Belt, Ancient Gneiss Complex (Swaziland). GeoBerlin meeting, Berlin.

54. Marien, C., Münker, C., Hoffmann, J.E. (2015) Are oceanic plagiogranites from Cyprus Archean TTG analogues?. Goldschmidt Conference 2015, Prague.

53. Viehmann, S., Bau, M., Hoffmann, J.E., Münker, C. (2015) Tracing the thermal state of the Archean mantle: Insights from coupled Eu-epsNd(t) systematics of BIF. Goldschmidt Conference 2015, Prague.

52. Hoffmann, J.E., Kröner, A. (2015) Alternative ways to produce TTGs:  insights from the 3.43-3.48 Ga Tsawela gneisses, Ancient Gneiss Complex (Swaziland). Goldschmidt Conference 2015, Prague.

51. Schneider, K.P., Hoffmann, J.E., Münker, C., Kröner, A. (2015) A felsic basement beneath the Barberton Greenstone Belt? – constrains from Hf-Nd isotope and trace element data. Goldschmidt Conference 2015, Prague.

50. van Acken, D., Hoffmann, J.E., Schorscher, H.J.D., Luguet, A., Schulz T. (2015) High-Al komatiites from the Archaean Nova Lima Group – multi-stage melting in the Archaean mantle? Goldschmidt Conference 2015, Prague.

49. Szilas, K., Tusch, J., Hoffmann, J.E., Münker, C. (2015) Mesoarchaean andesites in SW Greenland – Evidence for Archaean subduction zones? Goldschmidt Conference 2015, Prague.

48. Li, C., Becker, H., Puchtel, I.S., Wang, Z., Hoffmann, J.E. (2015) Abundances of chalcophile volatile elements in the Al-undepleted komatiites from Belingwe, Zimbabwe. Goldschmidt Conference 2015, Prague.

2014

47. van der Löcht, J., Münker, C., Hoffmann, J.E., Rosing, M.T. (2014) Geochemistry and Petrology of >3.8 Ga Archaean peridotites from southern West Greenland. Goldschmidt Conference 2015, Prague.

46. van der Löcht, J., Münker, C., Hoffmann, J.E., Rosing, M.T. (2014) Geochemistry and Petrology of 3.8 Ga Archaean peridotites from southern West Greenland. Abstract volume. DMG meeting, Jena.

45. Hoffmann, J.E., Kröner, A. (2014) Differences in the Composition of Ancient Gneiss Complexes – A Matter of Crustal Level? Mineralogical Magazine. Goldschmidt Conference, Sacramento.

45. Viehmann, S., Bau, M., Münker, C., Hoffmann, J.E., Marquez, J.E. (2014) The Hf-Nd isotope record of Archean seawater: avoiding pitfalls. EGU General assembly, Vienna, abstract # EGU2014-11726.

2013

44. Kröner, A., Hoffmann, J.E., Xie, H., Wu, F., Wan, Y. (2013) Early Archaean reworking and crustal growth in the eastern Kaapvaal craton, southern Africa. Meeting of the Chinese SHRIMP Center, October 2013. Beijing, China.

43. Hoffmann, J.E., Kröner, A., Hegner, E., Hofmann, A. (2013) Constraints on the origin of the 3450 Ma Tsawela gneisses, Ancient Gneiss Complex, Swaziland. Geofluids: Lubricants of the Dynamic Earth. DMG-GV joint meeting, Tübingen.

42. Hoffmann, J.E., Nagel, T.J., Münker, C., Næraa, T., Rosing, M.T. (2013) The process of Eoarchean TTG formation. Portsmouth, UK.

41. Cutts, K., Stevens, G., Hoffmann, J.E., Buick, I., Frei, D., Münker, C. (2013) P-T modelling and geochronology of the Barberton Granite Greenstone Belt, South Africa: rates and tectonic processes in the Archaean. Mineralogical Magazine. Goldschmidt Conference, Florence.

40. Hoffmann, J.E., Wilson, A.H. (2013) Archean mantle heterogeneities revealed by Hf-Nd isotope systematics of the 3.33 Ga Commondale komatiites. Mineralogical Magazine. Goldschmidt Conference, Florence.

39. Viehmann, S., Hoffmann, J.E., Münker, C., Bau, M. (2013) Decoupled Hf-Nd isotope systematics in early Precambrian seawater. Mineralogical Magazine. Goldschmidt Conference, Florence.

38. Szilas, K., Hoffmann, J.E., Scherstén, A. (2013) Petrogenesis of andesites in Mesoarchaean supracrustal belts of SW Greenland: geodynamic implications. Mineralogical Magazine. Goldschmidt Conference, Florence.

2012

37. Kröner, A., Hoffmann, J.E., Xie, H., Wu, F., Münker, C., Hegner, E., Wong, J., Wan, J., Liu, D. (2012) Generation of early Archean felsic volcanics and TTG gneisses through crustal melting, eastern Kaapvaal craton, southern Africa. EOS supplements. AGU Fall meeting, San Francisco.

36. Nagel, T., Hoffmann, J.E., Münker, C. (2012) Formation of Eoarchean TTGs by crustal depth melting of arc tholeiites. BRICS Conference Johannesburg. pp. 30-31.

35. Münker, C., Hoffmann, J.E., Nagel, T., Næraa, T., Polat, A., Rosing, M.T. (2012) Tracing the growth of old cratons with novel trace element and isotope tracers: the Itsaq Gneiss Complex, SW Greenland. BRICS Conference, Johannesburg. p. 32.

34. 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. pp. 19-21.

33. 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. pp. 12-13.

32. 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.

30. Viehmann, S., Bau, M., Hoffmann, J.E., Münker (2012) Evidence for hydrothermal and detrital origin of REY in early Proterozoic Krivoy Rog BIFs, Ukraine. GV meeting, Hamburg.

29. Hoffmann, J.E., Münker, C., Nagel, T.J., Næraa, T., Polat, A., Rosing, M.T. (2012) Building Eoarchean crust - the arc tholeiite-TTG connection. Mineralogical Magazine, Goldschmidt Conference, Montreal. (invited)

28. 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. Mineralogical Magazine, Goldschmidt Conference, Montreal.

27. 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. Mineralogical Magazine, Goldschmidt Conference, Montreal.

26. 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. Internation Geological Congress, Brisbane.

25. 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.

24. 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.

23. 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.

2011

22. 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.

21. Hoffmann, J.E., Nagel, T.J., Münker, C. (2011) Eoarchean TTG formation by melting of thickened mafic arc crust. Mineralogical Magazine, Goldschmidt Conference, Prague.

20. Viehmann, S., Hoffmann, J.E., Münker, C., Alexander, B.W., Bau, M. (2011) Seawater derived REE + Y and HFSE systematics of Archean Banded Iron Formations (BIFs). Mineralogical Magazine, Goldschmidt Conference, Prague.

19. 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. Constraints from combined U/Pb, Hf and O isotopes in zircon. Geophysical Research Abstracts 13, EGU2011-13670-1, 2011. EGU General Assembly, Vienna.

18. 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 13, EGU2011-11114-1, 2011. EGU General Assembly, Vienna.

2010

17. 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. EOS supplements. AGU fall meeting 2010, San Francsico.

16. 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 , Münster.

15. 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, Münster.

14. 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.

13. 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, Swaziland and South Africa. Paulpietersburgh and Elzuwini.

12. 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, Perth.

2009

11. 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 Göttingen. H. von Eynatten, J. Reitner, G. Wörner (Eds.). pp. 62-63., Universitätsverlag Göttingen.

10. 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 72(12), supplement 1, A540.

9. 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 72(12), supplement 1, A679.,

8. 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, Edinburgh. Abstract volume p. 132

7. 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, Halle an der Saale.

2008

6. 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. Goldschmidt Conference, Vancouver.

5. 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, Berlin.

2004 - 2007

4. 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 71(15), Suppl. 1, A 410. Goldschmidt Conference, Cologne.

3. 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). DMG meeting, Hannover.

2. 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). DMG meeting, Aachen.

1. 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). DMG meeting, Karlsruhe.