Geothermometry of calcite spar at 10-50 °C.

ABSTRACT: Carbonate geothermometry is a fundamental tool for quantitative assessment of the geothermal and geochemical evolution of diagenetic and hydrothermal systems, but it remains difficult to obtain accurate and precise formation temperatures of low-temperature calcite samples (below ~ 40 to 60 °C). Here, we apply three geothermometry methods (∆₄₇-thermometry, nucleation-assisted fluid inclusion microthermometry-hereafter NA-FIM-and oxygen isotope thermometry) to slow-growing subaqueous calcite spar samples to cross-validate these methods down to 10 °C. Temperatures derived by NA-FIM and Δ₄₇-thermometry agree within the 95% confidence interval, except for one sample. Regression analyses suggest that the real uncertainty of ∆₄₇-thermometry exceeds the 1 SE analyt

SUBMITTER: Koltai G 

PROVIDER: S-EPMC10796908 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature