Temperature dependence of ^(13)C-^(18)O clumping in synthetic aragonite: Laboratory calibration

Abstract

A paleothermometer has recently been proposed, based on the abundance of the doubly-substituted CO^(2-)_(3) isotopologue, ^(13)C^(18)O^(16)O^(2-)_2, in carbonate minerals [1, 2]. This carbonate 'clumped' isotope thermometer requires only the carbonate mineral to estimate its formation temperature, in contrast to the conventional carbonate-water paleothermometer which requires the oxygen isotope compositions of both the carbonate and parent water.

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