Articles | Volume 12, issue 11
https://doi.org/10.5194/bg-12-3289-2015
https://doi.org/10.5194/bg-12-3289-2015
Technical note
 | 
03 Jun 2015
Technical note |  | 03 Jun 2015

Technical Note: A simple method for vaterite precipitation for isotopic studies: implications for bulk and clumped isotope analysis

T. Kluge and C. M. John

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Cited articles

Beck, W. C., Grossman, E. L., and Morse, J. W.: Experimental studies of oxygen isotope fractionation in the carbonic acid system at 15°, 25° and 40 °C, Geochim. Cosmochim. Ac., 69, 3493–3503, 2005.
Coplen, T. B.: Calibration of the calcite-water oxygen-isotope geothermometer at Devils Hole, Nevada, a natural laboratory, Geochim. Cosmochim. Ac., 71, 3948–3957, 2007.
Darling, W. G.: Hydrological factors in the interpretation of stable isotopic proxy data present and past: a European perspective, Quat. Sci. Rev., 23, 743–770, 2003.
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Dennis, K. J., Affek, H. P., Passey, B. H., Schrag, D. P., and Eiler, J. W.: Defining an absolute reference frame for "clumped" isotope studies of CO2, Geochim. Cosmochim. Ac., 75, 7117–7131, 2011.
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Short summary
•Vaterite was synthesized from a NaCl-saturated CaCO3 solution at 23-91°C •Vaterite occurred as pure or dominating phase and amounted up to 235 mg per experiment •The precipitation technique allows thermal and isotopic equilibration and enables oxygen and clumped isotope analyses •18α(vaterite-H2O) has the same temperature dependence as calcite •Vaterite δ18O values can hardly be distinguished from calcite (offset +0.0±0.4‰) •Clumped isotope values are indistinguishable from calibration data
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