Ruprecht-Karls-Universität Heidelberg

Physics of Isotopologues

Dr. Tobias Kluge


The research of Dr. Tobias Kluge has its major focus on the investigation of multiply-substituted isotopologues, the understanding of physical processes that lead to isotope fractionation, and the application of new proxies technique for paleoclimate reconstruction. Amongst others, carbonate clumped isotopes and noble gases in fluid inclusions are promising new techniques for the assessment of past climate variations that are applied in this research group.

The research group is part of the Heidelberg Graduate School of Fundamental Physics (HGSFP).

The research group is funded by the Excellence Initiative of DFG (German Research Foundation) and BMBF (German Ministry of Education and Research). The Excellence Intiative was intiated to foster world-class institutions and to promote cutting edge research.


  • Installation of a new isotope ratio mass spectrometer:

    Thermo Scientific MAT 253 Plus
    The new mass spectrometer of the team physics of environmental archives will be used for the high-precision analysis of clumped isotopes and standard stable isotopes of carbonates. Impressions from the installation in March 2016 (positioning of the magnet) and the setup in the laboratory are shown below.

  • Approval of two new research projects:

    HEiKA project "Check Extrema", interdisciplinary research project on climatic extreme events investigated from Natural and Historical Sciences perspectives. Funded by the Heidelberg-Karlsruhe Research Partnership of Heidelberg University, and Karlsruhe Institute of Technology (KIT); Germany
    Further information: HEiKA web site.
    Short video on the project outline, background details and first insights.

    DFG project "Water isotopes in fluid inclusions of speleothems". Funded by the German Science Foundation DFG.
    Further information: DFG web site.

  • Speleothem-specific session at the upcoming EGU 2017
    The speleothem archive: understanding processes and interpreting Quaternary climate change (CL 1.13)
    Convener: Marc Luetscher, Co-Conveners: Michael Deininger, Tobias Kluge, Jens Fohlmeister

  • New publications

    Garcia del Real, P., Maher, K., Kluge, T., Bird, D.K., Brown, G.E.B. Jr., John, C.M., 2016. Clumped-isotope thermometry of magnesium carbonates in ultramafic rocks , Geochimica et Cosmochimica Acta, 193, 222-250.

    Ritter, A.-C., Kluge, T., Berndt, J., Richter, D.K., John, C.M., Bodin, S., Immenhauser, A., 2015. Application of redox sensitive proxies and carbonate clumped isotopes to Mesozoic and Paleozoic radiaxial fibrous calcite cements , Chemical Geology, 417, 306-321.

    Kele, S., Breitenbach, S.F.M., Capezzuoli, E., Nele Meckler, A., Ziegler, M., Millan, I.M., Kluge, T., Deák, J., Hanselmann, K., John, C.M., Yan, H., Liu, Z., Bernasconi, S.M, 2015. Temperature dependence of oxygen- and clumped isotope fractionation in carbonates: a study of travertines and tufas in the 6-95°C temperature range, Geochimica et Cosmochimica Acta, 168, 172-192.

    T. Kluge, C.M. John, 2015. Technical Note: A simple method for vaterite precipitation for isotopic studies: implications for bulk and clumped isotope analysis, Biogeosciences, 12, 3289-3299.

    T. Kluge, C.M. John, 2015. Effects of brine chemistry and polymorphism on clumped isotopes revealed by laboratory precipitation of mono- and multiphase calcium carbonates, Geochimica et Cosmochimica Acta, accepted manuscript.

    T. Kluge, C.M. John, A.-L. Jourdan, S. Davis, J. Crawshaw, 2015. Laboratory calibration of the calcium carbonate clumped isotope thermometer in the 25-250°C temperature range , Geochimica et Cosmochimica Acta, 157, 213-227.

    A. Geske, R.H. Goldstein, V. Mavromatis, D.K. Richter, D. Buhl, T. Kluge, C.M. John, A. Immenhauser, 2015. The magnesium isotope (δ26Mg) signature of dolomites , Geochimica et Cosmochimica Acta, 149, 131-151.

Group members

  • Dr. Tobias Kluge, Research group leader

    Institute of Environmental Physics
    Im Neuenheimer Feld 229, Room 3.30
    Phone +49 (0)6221-54-6511

  • Ivan Prokhorov, PhD student
  • Therese Weißbach, PhD student
  • Maximilian Kalb, Master student
  • David Schäfer, Master student
  • Laura Lüttkes, Bachelor/Project student
  • Tobias Schmitt, Bachelor/Project student
  • Sabrina Mack, Staatsexamenskandidatin

Open positions

Several research opportunities for master and bachelor students are currently available: Link



For the full publication list see: Link
Conference contributions

Conference contributions

Conference contributions of the research group are summarized here: Link




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