Controls on the stable isotope compositions of travertine from hyperalkaline springs in Oman: Insights from clumped isotope measurements
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Figure 1 shows a strong δ13C-δ18O correlation spanning about 25‰, with most values isotopically lighter than the expected equilibrium value.
“Figure 1 (data from Falk et al., 2016; Mervine et al., 2014; Clark et al., 1992; Clark and Fontes, 1990) shows the strong δ 13 Cδ 18 O correlation spanning a range of about 25‰, with most of the values being isotopically lighter than the expected equilibrium value.”
From Isotopic fractionation accompanying CO2 hydroxylation and carbonate precipitation from high pH waters at The Cedars, California, USA (2021) · cites this paper as Falk et al., 2016
The rest of the δ13C-δ18O array has been attributed to some combination of mixing between different DIC sources, partial equilibration of DIC, and post-depositional recrystallization.
“The rest of the array has been attributed to some combination of mixing between different DIC sources, partial equilibration of DIC, and post-depositional recrystallization (Falk et al., 2016).”
From Isotopic fractionation accompanying CO2 hydroxylation and carbonate precipitation from high pH waters at The Cedars, California, USA (2021) · cites this paper as Falk et al., 2016
The scatter at the heavy end of the Oman array is most likely due to variable δ13C of DIC in alkaline spring waters and other DIC sources over the large area (50 x 200 km) sampled.
“The scatter at the heavy end of the array is most likely due to variable δ 13 C of DIC in alkaline spring waters and other DIC sources over the large area (50 x 200 km) sampled (Falk et al., 2016).”
From Isotopic fractionation accompanying CO2 hydroxylation and carbonate precipitation from high pH waters at The Cedars, California, USA (2021) · cites this paper as Falk et al., 2016
The difference in light isotope limits appears to be a consequence of the δ18O of H2O and OH- being about 6‰ higher in Oman, with OH- contributing 1/3 of the oxygen to CO3 2- during hydroxylation.
“The difference in light isotope limits thus appears to be a consequence of the δ 18 O of H2O and OH - being about 6‰ higher in Oman, with OH - contributing 1/3 of the oxygen to CO3 2 -during hydroxylation (Falk et al., 2016).”
From Isotopic fractionation accompanying CO2 hydroxylation and carbonate precipitation from high pH waters at The Cedars, California, USA (2021) · cites this paper as Falk et al., 2016
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References 97 · Cited by 75
- Authors
- Falk, E. S., Guo, W., Paukert, A. N., Matter, J. M., Mervine, E. M., & Kelemen, P. B.
- Affiliations
- Woods Hole Oceanographic Institution (US)
- Lamont-Doherty Earth Observatory (US)
- De Beers (South Africa) (ZA)
- Corresponding author
- Falk, E.S.
- Venue
- Geochimica et Cosmochimica Acta
- Publisher
- Elsevier BV
- Published
- 2016-11
- Volume
- 192
- Pages
- 1-28
- ISSN
- 0016-7037 (ISSN-L)
- OpenAlex
- W2465724775
- Cited by
- 75
- References
- 97
- Citations by year
- 2026: 3 · 2025: 3 · 2024: 2 · 2023: 13 · 2022: 7 · 2021: 15 · 2020: 13 · 2019: 5 · 2018: 7 · 2017: 6 · 2016: 1
- FWCI
- 6.46
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Geochimica et Cosmochimica Acta (publishedVersion)
- ePrints Soton (University of Southampton) (acceptedVersion)
- Topics
- Physical Sciences › Earth and Planetary Sciences › Geochemistry and Petrology › Groundwater and Isotope Geochemistry
- Physical Sciences › Earth and Planetary Sciences › Geophysics › Geological and Geochemical Analysis
- Physical Sciences › Earth and Planetary Sciences › Geochemistry and Petrology › Geochemistry and Elemental Analysis
- Keywords
- travertine, clumped isotopes, serpentinization, peridotite, Samail ophiolite, radiocarbon ages, carbon and oxygen isotopes
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