The potential for carbonate clumped isotope thermometry to independently constrain both
the formation temperature 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 temperature
measurements. To address discrepancies between calibrations, we designed and analyzed
a sample suite (41 total samples) with broad applicability across the geosciences, with an …

Carbonate clumped isotope thermometry is a powerful geochemical tool that can 62
determine the formation temperature of a carbonate mineral based on the temperature-63
dependent propensity for 13C-18O bond formation in the carbonate crystal lattice (Schauble
64 et al., 2006). By reacting carbonate minerals with acid and measuring the resultant quan-
65 tity of mass-47 CO2 molecules (δ47; a value primarily controlled by the abundance 13C-
66 18O-16O in the analyzed CO2) and comparing it to a stochastic distribution of 13C-18O …