The geologic history of seawater oxygen isotopes from marine iron oxides
Abstract
Not as hot as we thought: Earth's early oceans appear not to have been as hot as some have suggested. The oxygen isotope composition of marine carbonates has changed markedly over the past 3.5 billion years. However, it has been difficult to determine whether that is because of a cooling of the seawater (from temperatures as high as 70°C) or an actual change in the isotope composition of the water. Galili et al. calibrated the temperature-dependent oxygen isotope fractionation between iron oxides and aqueous solutions and constructed an oxygen isotope record in marine iron oxides covering the past 2 billion years. Their findings suggest that a change in the isotope composition of the water, rather than its cooling, underlies the observed geological trend. Science , this issue p. 469
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O isotopes in iron oxides since 2 Ga ago suggest a secular increase in δ18Oseawater.
“Alternatively, O isotopes in iron oxides since 2 Ga ago suggest a secular increase in δ18Oseawater (236).”
From The Archean atmosphere (2020) · cites this paper as [236]
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- Authors
- Galili, N., Shemesh, A., Yam, R., Brailovsky, I., Sela-Adler, M., Schuster, E. M., Collom, C., Bekker, A., Planavsky, N., Macdonald, F. A., Préat, A., Rudmin, M., Trela, W., Sturesson, U., Heikoop, J. M., Aurell, M., Ramajo, J., & Halevy, I.
- Affiliations
- Weizmann Institute of Science (IL)
- Royal Tyrrell Museum (CA)
- University of California, Riverside (US)
- Yale University (US)
- University of California, Santa Barbara (US)
- Department of Biogeochemistry and Modeling of the Earth System, University of Brussels, Brussels, Belgium.
- Tomsk Polytechnic University (RU)
- Polish Geological Institute, Warsaw, Poland.
- Uppsala University (SE)
- Los Alamos National Laboratory (US)
- Universidad de Zaragoza (ES)
- Corresponding author
- Galili, Nir
- Halevy, Itay
- ORCID
- Venue
- Science
- Published
- 2019-08-02
- Volume
- 365
- Issue
- 6452
- Pages
- 469-473
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2966139404
- Cited by
- 128
- References
- 198
- Citations by year
- 2026: 7 · 2025: 16 · 2024: 18 · 2023: 16 · 2022: 20 · 2021: 23 · 2020: 25 · 2019: 3
- FWCI
- 13.49
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Science (publishedVersion)
- PubMed (publishedVersion)
- Dépôt institutionnel de l'Université libre de Bruxelles (Université Libre de Bruxelles) (submittedVersion)
- Funders
- National Science Foundation
- H2020 European Research Council (755053)
- Weizmann Institute of Science
- Russian Foundation for Basic Research (18-35-00022)
- Russian Science Foundation (17-77-10042)
- Topics
- Physical Sciences › Earth and Planetary Sciences › Paleontology › Paleontology and Stratigraphy of Fossils
- Physical Sciences › Earth and Planetary Sciences › Geochemistry and Petrology › Geochemistry and Elemental Analysis
- Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Geology and Paleoclimatology Research
- Keywords
- seawater oxygen isotopes, paleoceanography, early Earth oceans, seawater temperature, oxygen isotope fractionation, marine carbonates, geological history
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