Timm John
Mineralogie-Petrologie
Free University of Berlin
Germany
Biography
since Aug. 2013: Berlin, Professor for Mineralogy and Petrology, Freie Universität Berlin. Jan. 2009: Akademischer Rat auf Zeit at the Institute for Mineralogy, University of Münster, Germany. Aug. 2006-Dec. 2008: Senior postdoc position at the centre for Physics of Geological Processes (PGP), University of Oslo (Norway), Research topics: physical and geochemical consistent numerical solution for reactive fluid flow in rocks under high-pressure / low-temperature conditions, based on field observations. Jan. 2002-Aug. 2006: Postdoctoral Fellow. Research project part of SFB 574 Volatiles and Fluids in Subduction Zones: Climate Feedback and Trigger Mechanism for Natural Disasters at Kiel University. P-T-t-X and isotopic investigations of subducted fragments of former oceanic lithosphere to understand element and volatile losses in subducting slabs. Nov 2000-Jun. 2001: Visiting scientist at the Zentrallabor für Geochronologie at Mineralogical Institute, University of Münster, Germany. Mar. 1998-Dec. 2001: Research associate, Kiel University, Germany; Dissertation project: petrological, geochemical, and geochronological investigations on high-pressure rocks of Zambia. Feb. 1991-Nov. 1991: Drilling assistant (pratical) in a geological pilot study in Bitterfeld (Germany), Noell Umweltdiensten. Duties included soil sampling with different techniques at different depths and to develop maps about the pollution and hazard potential of the investigated area.
Research Interest
Physical and chemical processes during the dehydration of subducting oceanic lithosphere (reactive fluid flow under high-pressure / low-temperature conditions).
Publications
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Bellucci, J. J., Whitehouse, M. J., John, T., Nemchin, A. A., Snape, J. F., Bland, P. A., & Benedix, G. K. (2017). Halogen and Cl isotopic systematics in Martian phosphates: Implications for the Cl cycle and surface halogen reservoirs on Mars. Earth and Planetary Science Letters, 458, 192–202.
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Manzini M., Bouvier A.-S., Barnes J. D., Bonifacie M., Rose-Koga E. F., Ulmer P., Métrich N., Bardoux G., Williams J., Layne G. D., Straub S., Baumgartner L. P., John T. (2017). SIMS chlorine isotope analyses in melt inclusions from arc settings. Chemical Geology 449, 112-122.
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Plümper, O., John, T., Podladchikov, Y. Y. , Vrijmoed, J. C. & Scambelluri, M. (2017). Fluid escape from subduction zones controlled by channel-forming reactive porosity. Nature Geoscience 10,150–156.
