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A unified clumped isotope thermometer calibration (0.5-1100C) using carbonate-based standardization
  • +11
  • Noah Anderson,
  • J R Kelson,
  • S Kele,
  • M Daëron,
  • M Bonifacie,
  • J Horita,
  • T J Mackey,
  • C M John,
  • T Kluge,
  • P Petschnig,
  • A B Jost,
  • K W Huntington,
  • S M Bernasconi,
  • K D Bergmann
Noah Anderson
Massachusetts Institute of Technology

Corresponding Author:[email protected]

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J R Kelson
University of Michigan
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S Kele
Research Center for Astronomy and Earth Sciences
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M Daëron
Université Paris-Saclay
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M Bonifacie
Université Paris Diderot
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J Horita
Texas Tech University
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T J Mackey
University of New Mexico
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C M John
Imperial College
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T Kluge
Karlsruhe Institute of Technology
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P Petschnig
ETH Zürich, Institute of Geochemistry and Petrology
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A B Jost
Massachusetts Institute of Technology
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K W Huntington
University of Washington
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S M Bernasconi
ETH Zurich
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K D Bergmann
Massachusetts Institute of Technology
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The potential for carbonate clumped isotope thermometry to independently constrain both the formation temperature (T∆47 ) of carbonate minerals and fluid oxygen isotope composition allows insight into long-standing questions in the Earth sciences, but remaining discrepancies between calibration schemes hamper interpretation of T∆47 measurements. To address discrepancies between calibrations, we designed and analyzed a sample suite (41 total samples) with broad applicability across the geosciences, with an exceptionally wide range of formation temperatures, precipitation methods, and mineralogies. We see no statistically significant offset between sample types, although comparison of calcite and dolomite remains inconclusive. When data are reduced identically, the regression defined by this study is nearly identical to that defined by four previous calibration studies that used carbonate-based standardization; we combine these data to present a composite carbonate-standardized regression equation. Agreement across a wide range of temperature and sample types demonstrates a unified, broadly applicable clumped isotope thermometer calibration.