Research Foci
- Hf-W chronometry of early solar system materials
- Tellurium stable isotope fractionation in extraterrestrial and terrestrial samples
- Nucleosynthetic (Ti, Cr) isotope anomalies in meteorites
CV
Academic Education
- Doctor of Natural Sciences (Dr. rer. nat.) - Cosmochemistry and Isotope Geochemistry, University of Münster
- Master of Science (M.Sc.) - Geosciences/Earth Sciences, University of Münster
- Bachelor of Science (B.Sc.) - Geosciences/Earth Sciences, University of Münster
Positions
- Postdoctoral Researcher, Institute for Planetology, University of Münster
- Research assistant (doctoral student), Institute for Planetology, University of Münster
- Student assistant, Institute for Planetology, University of Münster
Honors
- Paul Pellas - Graham Ryder Award in the category Best Student Paper in Planetary Sciences – The Meteoritical Society
- Outstanding Student Presentation Award in the category Planetary Sciences – American Geophysical Union (AGU)
- Wiley Award – McKay Award Committee of The Meteoritical Society
External Functions
- German Mineralogical Society
- Meteoritical Society
- European Association of Geochemistry
Project
- CRC TRR 170 - B02: Stable isotope fractionation of S, Te and Pd and the roles of core formation and late accretion on siderophile volatile elements in the Earth ( – )
Subproject in DFG-Joint Project Hosted outside the University of Münster: DFG - Collaborative Research Centre | Project Number: TRR 170/1
- CRC TRR 170 - B02: Stable isotope fractionation of S, Te and Pd and the roles of core formation and late accretion on siderophile volatile elements in the Earth ( – )
Publications
- Renggli, CJ, Hellmann, JL, Burkhardt, C, Klemme, S, Berndt, J, Pangritz, P, and Kleine, T. . “Tellurium isotope fractionation during evaporation from silicate melts.” Geochimica et Cosmochimica Acta, № 339: 35–45. doi: 10.1016/j.gca.2022.10.032.
- Bischoff, A, Alexander, CM O'D, Burkhardt, C, Busemann, H, Degering, D, Di, Rocco T, Fischer, M, Fockenberg, T, Foustoukos, DI, Gattacceca, J, Godinho, JR A, Harries, D, Heinlein, D, Hellmann, JL, Hertkorn, N, Holm, A, Jull, AJ T, Kerraouch, I, King, AJ, Kleine, T, Koll, D, Lachner, J, Ludwig, T, Merchel, S, Mertens, CA K, Morino, P, Neumann, W, Pack, A, Patzek, M, Pavetich, S, Reitze, MP, Rüfenacht, M, Rugel, G, Schmidt, C, Schmitt-kopplin, O, Schönbächler, M, Trieloff, M, Wallner, A, Wimmer, K, and Wölfer, E. . “The old, unique C1 chondrite Flensburg–insight into the first processes of aqueous alteration, brecciation, and the diversity of water-bearing parent bodies and lithologies.” Geochimica et Cosmochimica Acta, № 293: 142–186. doi: 10.1016/j.gca.2020.10.014.
- Metzler, K, Hezel, DC, Barosch, J, Wölfer, E, Schneider, JM, Hellmann, JL, Berndt, J, Stracke, A, Gattacceca, J, Greenwood, RC, Franchi, IA, Burkhardt, C, and Kleine, T. . “The Loongana (CL) group of carbonaceous chondrites.” Geochimica et Cosmochimica Acta, № 304: 1–31. doi: 10.1016/j.gca.2021.04.007.
- Hellmann, JL, Hopp, T, Burkhardt, C, Becker, H, Fischer-Gödde, M, and Kleine, T. . “Tellurium isotope cosmochemistry: Implications for volatile fractionation in chondrite parent bodies and origin of the late veneer.” Geochimica et Cosmochimica Acta, № 309: 313–328. doi: 10.1016/j.gca.2021.06.038.
- Hellmann, JL, Hopp, T, Burkhardt, C, and Kleine, T. . “Origin of volatile element depletion among carbonaceous chondrites.” Earth and Planetary Science Letters, № 549: 116508. doi: 10.1016/j.epsl.2020.116508.
- Hellmann, JL, Kruijer, TS, Metzler, K, Patzek, M, Pack, A, Berndt, J, and Kleine, T. . “Hf-W chronology of a macrochondrule from the L5/6 chondrite Northwest Africa 8192.” Meteoritics and Planetary Science, № 55 (10): 2241–2255. doi: 10.1111/maps.13571.
- Hellmann, JL, Kruijer, TS, Van Orman, JA, Metzler, K, and Kleine, T. . “Hf-W chronology of ordinary chondrites.” Geochimica et Cosmochimica Acta, № 258: 290–309. doi: 10.1016/j.gca.2019.05.040.
- Archer, GJ, Walker, RJ, Tino, J, Blackburn, T, Kruijer, TS, and Hellmann, JL. . “Siderophile element constraints on the thermal history of the H chondrite parent body.” Geochimica et Cosmochimica Acta, № 245: 556–576. doi: 10.1016/j.gca.2018.11.012.
- Kleine, T, Budde, G, Hellmann, JL, Kruijer, TS, and Burkhardt, C. . “Tungsten isotopes and the origin of chondrules and chondrites.” in Chondrules: Records of Protoplanetary Disk Processes, edited by SS Russell, Jr.H C Connolly and AN Krot. Cambridge: Cambridge University Press. doi: 10.1017/9781108284073.010.
