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InterCarb: A Community Effort to Improve Interlaboratory Standardization of the Carbonate Clumped Isotope Thermometer Using Carbonate Standards

Bernasconi, S. M.; Daëron, M.; Bergmann, K. D.; Bonifacie, M.; Meckler, A. N.; Affek, H. P.; Anderson, N.; Bajnai, D.; Barkan, E.; Beverly, E.; Blamart, D.; Burgener, L.; Calmels, D.; Chaduteau, C.; Clog, M.; Davidheiser-Kroll, B.; Davies, A.; Dux, F.; Eiler, J.; ... mehr


Increased use and improved methodology of carbonate clumped isotope thermometry has greatly enhanced our ability to interrogate a suite of Earth-system processes. However, interlaboratory discrepancies in quantifying carbonate clumped isotope (Δ$_{47}$) measurements persist, and their specific sources remain unclear. To address interlaboratory differences, we first provide consensus values from the clumped isotope community for four carbonate standards relative to heated and equilibrated gases with 1,819 individual analyses from 10 laboratories. Then we analyzed the four carbonate standards along with three additional standards, spanning a broad range of δ$^{47}$ and Δ$_{47}$ values, for a total of 5,329 analyses on 25 individual mass spectrometers from 22 different laboratories. Treating three of the materials as known standards and the other four as unknowns, we find that the use of carbonate reference materials is a robust method for standardization that yields interlaboratory discrepancies entirely consistent with intralaboratory analytical uncertainties. Carbonate reference materials, along with measurement and data processing practices described herein, provide the carbonate clumped isotope community with a robust approach to achieve interlaboratory agreement as we continue to use and improve this powerful geochemical tool. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000140246
Veröffentlicht am 23.11.2021
DOI: 10.1029/2020GC009588
Zitationen: 84
Web of Science
Zitationen: 72
Zitationen: 100
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Geowissenschaften (AGW)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 05.2021
Sprache Englisch
Identifikator ISSN: 1525-2027, 1525-2027
KITopen-ID: 1000140246
HGF-Programm 38.04.04 (POF IV, LK 01) Geoenergy
Erschienen in Geochemistry, geophysics, geosystems
Verlag John Wiley and Sons
Band 22
Heft 5
Seiten Art.Nr.e2020GC009588
Bemerkung zur Veröffentlichung Artikel auch erschienen in: Clumped Isotope Geochemistry: From Theory to Applications
Vorab online veröffentlicht am 13.04.2021
Nachgewiesen in Web of Science
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