a18_CO2acid_c() calculates the 18O/16O fractionation factor between
CO2 produced from acid digestion and carbonate.
Arguments
- temp
Acid digestion temperature (°C).
- min
Mineralogy. Options are
"calcite","aragonite", and"dolomite".
Details
calcite (Kim et al. 2015):
$$\alpha^{18}_{CO2acid/calcite} = e^{(3.48 \times \frac{1}{T} - 0.00147)}$$
aragonite (Kim et al. 2007):
$$\alpha^{18}_{CO2acid/aragonite} = e^{(3.39 \times \frac{1}{T} - 0.00083)}$$
dolomite (Rosenbaum & Sheppard 1986):
$$\alpha^{18}_{CO2acid/dolomite} = e^{(665 \times \frac{1}{T^{2}} + 0.00423)}$$
References
Sharma, T., and Clayton, R. N. (1965). Measurement of ratios of total oxygen of carbonates. Geochimica et Cosmochimica Acta, 29(12), 1347-1353. doi:10.1016/0016-7037(65)90011-6
Rosenbaum, J. and Sheppard, S.M.F. (1986). An isotopic study of siderites, dolomites and ankerites at high temperatures. Geochimica et Cosmochimica Acta, 50, 1147-1150. doi:10.1016/0016-7037(86)90396-0
Kim, S.-T., Mucci, A., and Taylor, B. E. (2007). Phosphoric acid fractionation factors for calcite and aragonite between 25 and 75 °C: Revisited. Chemical Geology, 246(3-4), 135-146. doi:10.1016/j.chemgeo.2007.08.005
Kim, S.-T., Coplen, T. B., and Horita, J. (2015). Normalization of stable isotope data for carbonate minerals: Implementation of IUPAC guidelines. Geochimica et Cosmochimica Acta, 158, 276-289. doi:10.1016/j.gca.2015.02.011
See also
Other fractionation_factors:
a13_CO2g_CO2aq(),
a18_CO2aq_H2O(),
a18_CO2g_H2O(),
a18_CO3_H2O(),
a18_H2O_OH(),
a18_HCO3_H2O(),
a18_c_H2O(),
a_A_B()