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Optical clumped isotope thermometry of carbon dioxide and methane

Clumped isotope thermometry exploits the relative abundance of doubly substituted isotopologues to decipher the formation temperature of minerals. Here we present a promising approach based on mid-IR laser absorption spectroscopy for high-precision measurements of 13C18O16O, 12C18O2, 13CH3D, and 12CH2D2 isotopologues in CO2 and CH4. This optical approach offers rapid analysis on a 10-20 minutes scale, compared to hours or days needed for mass spectrometry. The currently reached sub-‰ precision is sufficient for the realization of an optical isotope thermometer for many geochemical applications.

Details

Author
Ivan Prokhorov1, Akshay Nataraj1, Béla Tuzson1, Nico Kueter2, Ricarda Rosskopf2, Tobias Kluge3, Christof Janssen4, Lukas Emmenegger1, Stefano M. Bernasconi2, Joachim Mohn1
Institutionen
1Laboratory for Air Pollution / Environmental Technology, Empa, Dübendorf, Switzerland; 2Department of Earth Sciences, ETH Zurich, Zurich, Switzerland; 3Institute of Environmental Physics, Heidelberg University, Heidelberg, Germany;Institute of Applied Geosciences, Karlsruhe Institute of Technology, Karlsruhe, Germany; 4LERMA-IPSL, Sorbonne Université, CNRS, Observatoire de Paris, PSL Université, Paris, France
Veranstaltung
GeoMinKöln 2022
Datum
2022
DOI
10.48380/4a00-2720
Geolocation
Europe