Abstract
The authors regret an error in the derivation of the link between KFFs and isotopic rate constants of CO _{2} hydration (Section 2.2). Considering the subset of isotopologues, C ^{16}O ^{16}O, C ^{18}O ^{16}O, H _{2} ^{16}O and H _{2} ^{18}O, there are four possible forward reactions: (1) C ^{16}O ^{16}O + H _{2} ^{16}O → H _{2}C ^{16}O ^{16}O ^{16}O,(2) C ^{18}O ^{16}O + H _{2} ^{16}O → H _{2}C ^{18}O ^{16}O ^{16}O,(3) C ^{16}O ^{16}O + H _{2} ^{18}O → H _{2}C ^{18}O ^{16}O ^{16}O,(4) C ^{18}O ^{16}O + H _{2} ^{18}O → H _{2}C ^{18}O ^{18}O ^{16}O.Reaction (4) involves rare isotopologues of both CO _{2} and of H _{2}O, forms a doubly substituted isotopologue, and was not included in the original paper. Indeed, backward reaction (4) may be neglected in the derivation of the link between KFFs and isotopic rate constants of H _{2}CO _{3} dehydration. However, forward reaction (4) still should have been considered in the derivation of the link between KFFs and isotopic rate constants of CO _{2} hydration. Including reaction (4) in the derivations presented in Section 2.2 and Appendix A.1 results in the following relations, (5) [Formula presented],(6) [Formula presented], which are distinct from those originally reported in Table 2, [Formula presented] and [Formula presented]. Thus, the dependence of the KFFs on the isotope ratio of the reactants, which was discussed in the paper, may be neglected. We have corrected Table 2 accordingly. Additionally, Fig. 2 of the original paper is obviated, as is its discussion in the text (last paragraph in Section 2.2). In the rest of the paper, this mistake affects only the theoretical KFF values of CO _{2} (de)hydration calculated using the isotopic rate constants of Zeebe (2014). The corrected KFF values differ by 2–4‰ from those reported in the paper, and are slightly farther from the experimental estimates after Clark and Lauriol (1992). We present below the corrected KFF values in revised Tables 4 and 6 along with values unaffected by the change (changes are underlined). Finally, we have revised Tables 8 and 9 and Figs. 3A and 4B which make use of the corrected KFFs to describe calcite precipitation at the kinetic limit. We thank Chen Zhou, University of Science and Technology of China, Hefei, for pointing out this mistake. We apologise for any inconvenience caused.
Original language  English 

Pages (fromto)  237240 
Number of pages  4 
Journal  Geochimica et Cosmochimica Acta 
Volume  225 
DOIs 

State  Published  15 Mar 2018 
All Science Journal Classification (ASJC) codes
 Geochemistry and Petrology