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Cited by 204Paleontology and Stratigraphy of FossilsGeochemistry and Elemental AnalysisGeology and Paleoclimatology Research

A kinetic model for the chemical composition of sea water

Broecker, W. S.·1971·Quaternary Research
DOI 10.1016/0033-5894(71)90041-x
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Abstract

The thermodynamic ocean of the Sillen school offers little incentive to those who search the sedimentary record for evidence of changes in ocean chemistry during Cenozoic time. Their models predict a uniform chemical composition. However as the sediments presently accumulating in the ocean show little evidence of equilibration with the overlying water, the possibility that kinetic factors play an important role must be seriously explored. Such a model is presented in this paper. Material balance restrictions are substituted for some of the usual chemical equilibria. The role of organisms is shown to be dominant for at least some of the important components of sea salt (i.e., C, N, P, Si, …). If, as proposed here, the chemistry of sea water is dependent on rates of supply of individual components, the rate of vertical mixing in the sea, and the type of material formed by organisms, then substantial changes in the chemical composition have almost certainly taken place. Several means by which such changes might be reconstructed from chemical and isotopic measurements on marine sediments are discussed.

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  • For many elements, seawater abundances are subject to kinetic controls where the dissolved reservoir scales with input/output fluxes without approaching solubility limits.

    “For many elements, seawater abundances are subject to kinetic controls (e.g., Broecker, 1971) where the dissolved reservoir scales with input/output fluxes without approaching solubility limits.”

    From Trace elements at the intersection of marine biological and geochemical evolution (2016) · cites this paper as Broecker, 1971

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Authors
Broecker, W. S.
Affiliations
Columbia University (US)
Corresponding author
Broecker, W. S.
ORCID
Broecker, W. S.
Venue
Quaternary Research
Publisher
Cambridge University Press (CUP)
Published
1971-04
Volume
1
Issue
2
Pages
188-207
ISSN
  • 0033-5894 (ISSN-L)
  • 1096-0287
DOI
10.1016/0033-5894(71)90041-x
OpenAlex
W1991977087
Cited by
204
References
44
Citations by year
2025: 4 · 2024: 5 · 2023: 2 · 2022: 2 · 2021: 1 · 2019: 3 · 2018: 3 · 2017: 5 · 2016: 3 · 2015: 3 · 2014: 5 · 2013: 2 · 2012: 2
FWCI
16.98
Type
journal article
Language
en
Open access
closed
Licence
www.cambridge.org/core/terms (unspecified, 16731 d)
Locations
Quaternary Research (publishedVersion)
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 chemical composition, kinetic model, marine sediment, mass balance, vertical mixing, paleoceanography

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