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.
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Author
Ivan Prokhorov1, Akshay Nataraj1, Béla Tuzson1, Nico Kueter2, Ricarda Rosskopf2, Tobias Kluge3, Christof Janssen4, Lukas Emmenegger1, Stefano M. Bernasconi2, Joachim Mohn1Institutionen
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, FranceVeranstaltung
GeoMinKöln 2022Datum
2022DOI
10.48380/4a00-2720Geolocation
Europe
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