Constraints for precise and accurate fluid inclusion stable isotope analysis using water-vapour saturated CRDS techniques

Therese Weissbach,Tobias Kluge,Stéphane Affolter,Markus C. Leuenberger,Hubert Vonhof,Dana F. C. Riechelmann,Jens Fohlmeister, Marie-Christin Juhl,Benedikt Hemmer,Yao Wu,Sophie F. Warken,Martina Schmidt,Norbert Frank,Werner Aeschbach

Chemical Geology（2023）

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摘要

Hydrogen (δ2H) and oxygen (δ18O) isotopes of water extracted from speleothem fluid inclusions are important proxies used for paleoclimate reconstruction. In our study we use a cavity ring-down laser spectroscopy system for analysis and modified the approach of Affolter et al. (2014) for sample extraction. The method is based on crushing of small sub-gram speleothem samples in a heated and continuously water-vapour purged extraction line. The following points were identified:

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关键词

Laser spectroscopy,Water isotopes,Cavity-ring-down measurement,Speleothems,Paleoclimate,Small samples

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