Reducing Uncertainties in Carbonate Clumped Isotope Analysis Through Consistent Carbonate-Based Standardization
Abstract
About a decade after its introduction, the field of carbonate clumped isotope thermometry is rapidly expanding because of the large number of possible applications and its potential to solve long‐standing questions in Earth Sciences. Major factors limiting the application of this method are the very high analytical precision required for meaningful interpretations, the relatively complex sample preparation procedures, and the mass spectrometric corrections needed. In this paper we first briefly review the evolution of the analytical and standardization procedures and discuss the major remaining sources of uncertainty. We propose that the use of carbonate standards to project the results to the carbon dioxide equilibrium scale can improve interlaboratory data comparability and help to solve long‐standing discrepancies between laboratories and temperature calibrations. The use of carbonates reduces uncertainties related to gas preparation and cleaning procedures and ensures equal treatment of samples and standards. We present a set of carbonate standards of diverse composition, discuss how they can be used to correct for mass spectrometric biases, and demonstrate that their use significantly improves the comparability among four laboratories. We propose that the use of these standards or of a similar set of carbonate standards will improve the comparability of data across laboratories. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000302436Publication status
publishedExternal links
Journal / series
Geochemistry, Geophysics, GeosystemsVolume
Pages / Article No.
Publisher
WileySubject
clumped isotopes; mass spectrometry; standardization; carbonate; paleothermometryOrganisational unit
09601 - Stoll, Heather / Stoll, Heather
Funding
160046 - Clumped Isotope Thermometry in burial diagenetic systems - part 2: new constraints on the kinetics of 13C-18O bond reordering from contact metamorphic aureoles of magmatic intrusions (SNF)
143485 - Application of Clumped Isotope Thermometry to burial diagenetic and low temperature hydrothermal systems. (SNF)
169849 - Improving the reconstruction of deep-time paleoclimate and diagenetic history of sedimentary basins with carbonate clumped isotopes. (SNF)
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