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Stable Isotope Laboratory

The stable isotope laboratory was established in 1998. The facility is housed in the Department of Geology and Paleontology, and has become a central tool for interdisciplinary research projects at the Karl-Franzens University, Graz.


The laboratory is equipped with a Finnigan MAT Delta Plus stable isotope ratio mass spectrometer.

Laser fluorination (BrF5) line

The automatic extraction line, Kiel II (on the right side), is used to extract the gas samples (CO2) from carbonates, allowing 40 analyses a day. At least 5μm for each sample are needed.

The laser fluorination (BrF5) line (on the left side) is used to extract the gas sample (O2) from silicates and oxides.


Miocene annual climate variations
Miocene (14 Million years ago) annual climate variations recorded
in 41 years old oyster (Harzhauser et al., 2011).

The measurements of carbon and oxygen stable isotope in carbonate are mainly used as tool for paleo-climate reconstructions, but are also used in study on the formation of mountains or mineral ore.

 The measurements of oxygen stable isotope in silicates and oxides are mainly used as tool for study on the formation and thermal evolution of mountains or mineral ore.

The facility operates for research, teaching and contract work.

If you are interested in our stable isotope facilities, please contact:
Jürgen Neubauer juergen.neubauer@uni-graz.at
Tel: ++43 (316) 380 8721

Some Projects involving stable isotopes operated in our laboratory:

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