Cited by 59Paleontology and Stratigraphy of FossilsGeological and Geochemical AnalysisGeochemistry and Elemental Analysis

Triple oxygen isotope mass balance for the Earth's oceans with application to Archean cherts

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Sengupta, Sukanya, Pack, Andreas·2018·Chemical Geology

Abstract

The oxygen isotope composition of the Earth's oceans is buffered by high- and low-T exchange with the lithosphere. We present a triple oxygen isotope mass balance model for the Earth's oceans. The model is based on triple oxygen isotope measurements of rocks from various reservoirs including high- and low-T alteration products. The modern ocean water composition can be well-matched if the ratio between continental weathering and high-T seafloor alteration is ~25% higher than previously assumed. The mass balance suggests that putative Precambrian low-δ18O ocean water would fall on a trend with slope λ = 0.51 passing through “modern” ice-free-world seawater. Exemplified application to a published Phanerozoic and Archean chert data suggest precipitation in cool oceans with modern-like δ18O followed by diagenetic alteration with involvement of meteoric water.

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Crossref · 10.1016/j.chemgeo.2018.07.012

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Research works printed but not linked: 2

  1. Warren, A., Bottjer, D.J. (Eds.), Evolutionary Paleoecology: The Ecological Context of Macroevolutionary Change. Columbia University Press, New York, pp. 35-61.
  2. Garcia, A.K., Schopf, J.W., Yokobori, S., Akanuma, S., Yamagishi, A., 2017. Reconstructed enzymes suggest hot early Earth. Proc. Natl. Acad. Sci. 114, 4619-4624.

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Authors
Sengupta, S., & Pack, A.
Affiliations
University of Göttingen (DE)
Corresponding author
Sengupta, Sukanya
Venue
Chemical Geology
Publisher
Elsevier BV
Published
2018-09
Volume
495
Pages
18-26
ISSN
0009-2541 (ISSN-L)
OpenAlex
W2885787650
Cited by
59
References
74
Citations by year
2026: 5 · 2025: 7 · 2024: 5 · 2023: 7 · 2022: 5 · 2021: 16 · 2020: 8 · 2019: 6
FWCI
5.52
Type
journal article
Language
en
Open access
Locations
  • Chemical Geology (publishedVersion, cc-by-nc-nd)
  • GoeScholar The Publication Server of the Georg-August-Universität Göttingen (Georg-August-Universität Göttingen) (submittedVersion, cc-by-nd)
Funders
Deutsche Forschungsgemeinschaft (PA 909/14-1)
Topics
  • Physical Sciences › Earth and Planetary Sciences › Paleontology › Paleontology and Stratigraphy of Fossils
  • 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
triple oxygen isotopes, oxygen isotopes, continental weathering, seafloor alteration, meteoric water, diagenesis

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