Cited by 96Geology and Paleoclimatology ResearchGroundwater and Isotope GeochemistryPaleontology and Stratigraphy of Fossils

Kinetic isotope effect in CO2 degassing: Insight from clumped and oxygen isotopes in laboratory precipitation experiments

Affek, Hagit P., Zaarur, Shikma·2014·Geochimica et Cosmochimica Acta

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Crossref · 10.1016/j.gca.2014.08.005

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  • Including tufa samples deposited from cold karstic waters, the regression line becomes 1000lnα = (16.8±1.7) x 1000/T - (26±5.4) (R2 = 0.95), indistinguishable from Tremaine et al. (2011) and Affek and Zaarur (2014), confirming these regression lines are valid to temperatures up to 95°C.

    “If we include the tufa samples deposited from cold karstic waters, the regression line becomes 1000ln a = (16.8±1.7) x 1000/T - ( 26±5.4) (R 2 = 0.95) (Fig. 5A), which is indistinguishable from the regression line of Tremaine et al. (2011) and the results of the surface precipitation experiments of Affek and Zaarur (2014), confirming that these regression lines are valid to temperatures of up to 9”
  • The paper's data confirms the observations of Affek and Zaarur (2014) that higher fractionations in δ18O do not seem to be reflected in the clumped isotope data.

    “but our data confirms the observations of Affek and Zaarur (2014) that these higher fractionations in d 18 O do not seem to be reflected in the clumped isotope data.”
  • Nesquehonite records clumped-isotope compositions that result in anomalously warmer temperatures related to kinetic factors associated with dehydroxylation or dehydration of HCO3 and ensuing CO2 degassing.

    “Comparable to calcium carbonate speleothems, nesquehonite records clumped-isotope compositions that result in anomalously warmer temperatures related to kinetic factors associated with dehydroxylation (Eiler et al., 2014) or dehydration (Affek and Zaarur, 2014) of HCO3 and ensuing CO2 degassing.”

    From Clumped-isotope thermometry of magnesium carbonates in ultramafic rocks (2016) · cites this paper as Affek and Zaarur, 2014

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Authors
Affek, H. P., & Zaarur, S.
Affiliations
Yale University (US)
Corresponding author
Affek, Hagit P.
Venue
Geochimica et Cosmochimica Acta
Publisher
Elsevier BV
Published
2014-10
Volume
143
Pages
319-330
ISSN
0016-7037 (ISSN-L)
OpenAlex
W2080656334
Cited by
96
References
64
Citations by year
2026: 5 · 2025: 6 · 2024: 8 · 2023: 7 · 2022: 10 · 2021: 13 · 2020: 6 · 2019: 11 · 2018: 7 · 2017: 10 · 2016: 4 · 2015: 8 · 2014: 1
FWCI
5.09
Type
journal article
Language
en
Open access
closed
Locations
Geochimica et Cosmochimica Acta (publishedVersion)
Funders
  • Binational Science Foundation (BSF-2008158)
  • National Science Foundation (NSF-EAR-0842482)
Topics
  • Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Geology and Paleoclimatology Research
  • Physical Sciences › Earth and Planetary Sciences › Geochemistry and Petrology › Groundwater and Isotope Geochemistry
  • Physical Sciences › Earth and Planetary Sciences › Paleontology › Paleontology and Stratigraphy of Fossils
Keywords
kinetic isotope effects, CO2 degassing, clumped isotopes, oxygen isotopes, calcite precipitation, isotopic disequilibrium, clumped isotope thermometry, oxygen isotope thermometry, temperature dependence, stalagmites, speleothems, dissolved inorganic carbon

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