Prof. apl. Dr. Jens Fiebig

Senior Research Associate ('Akademischer Oberrat')
- Head of Stable Isotope Lab

Tel. +49 69 - 798 40182 (Bureau)
Tel. +49 69 - 798 40279/40280 (Lab)

Room No. 2.335 (Bureau) / 0.205 (Mass spectrometry)



Stable Isotope Lab Manager

Working Group:

Stable Isotopes

David Bajnai (PhD Student): ResearchGate link
Niklas Löffler (PhD Student)

Christoph Schreiber (Master Student)
Techn. Assistant Sven Hofmann

Research Interests:

Stable isotopes and clumped isotopes
Geochemistry of volcanic gases
Origin of hydrocarbons in hydrothermal systems
Reconstruction of paleoenvironmental conditions using traditional stable and clumped isotopes
Development of new techniques for stabie Isotope analysis of geo-materials


Einführung in die Isotopengeochemie - PDFs: 1 Theorie,
Geochemie der stabilen Isotope bzw. Isotopen- und Spurenelementanalytik I
Isotopen- und Spurenelementanalytik II
Materialanalytische Methoden


Redox and temperature conditions governing chemical and isotopic equilibration of CO2 and CH4 in volcanic hydrothermal systems (2005-2008; FI-948/1-1)
Assessing the geochemical signatures of abiogenically dominated methane sources (2008-2011; FI-948/2-1)
Carbonation of porous rocks by interaction with magmatic and hydrothermal fluids - a case study on Unzen volcano (2009-2012; FI-948/3-1)
Clumped isotope thermometry applied to bivalve mollusks (2010-2014; Fi-948/4-1)
Bulk carbon and clumped isotope composition of N-alkanes in volcanic-hydrothermal emissions (since 2013; Fi-948/6-1)

Empirical and experimental calibration of a clumped isotope (paleo)thermometer for bioapatites (since 2014; Fi-948/7-1)
Clumped isotopes in Brachiopods as an indicator of seawater and diagenetic temperatures (since 2015; ESR08, ITN Baseline Earth, Horizon 2020, EU) Link
Hydrocarbons in Icelandic volcanic-hydrothermal discharges: An inventory of concentrations and preliminary bulk carbon, radiocarbon and clumped isotope data (since 2015; FI-948/8-1)


Laboratory Stable Isotopes (Goethe University and BIK-F)
Curriculum vitae



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