Cited by 222Paleontology and Stratigraphy of FossilsGeochemistry and Elemental AnalysisOrigins and Evolution of Life

Was There Really an Archean Phosphate Crisis?

Konhauser, Kurt O., Lalonde, Stefan V., Amskold, Larry, Holland, Heinrich D.·2007·Science

Abstract

During the Archean, massive amounts of iron were deposited in the form of banded iron formations. It has been suggested that sedimenting particles of ferric oxyhydroxide may have stripped dissolved phosphate from the oceans, causing a reduction in phytoplankton productivity. However, that model does not take into account the high concentration of dissolved silica that was present in seawater at that time. We show experimentally that silica effectively competes with phosphate for sorption sites on ferrihydrite particles. Furthermore, coprecipitation of silica with ferrihydrite reduces particle reactivity toward phosphate. Hence, Archean oceans probably contained considerably more phosphate than previously predicted.

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Crossref · 10.1126/science.1136328

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  • Iron formation data have recently been linked to high dissolved silica concentrations rather than a phosphorus crisis; silica can outcompete phosphorus for binding sites on iron oxides.

    “However, the iron formation data have recently been linked to high dissolved silica concentrations rather than a P crisis; silica can outcompete P for binding sites on iron oxides (Konhauser et al., 2007; Planavsky et al., 2010).”

    From The Astrobiology Primer v2.0 (2016) · cites this paper as Konhauser et al., 2007

  • Iron formations have proven useful as paleomarine proxies because trace metal content in least metamorphosed units is almost entirely derived from seawater.

    “As iron-and silica-rich chemical sedimentary deposits, IF have proven useful because the trace metal content in the least metamorphosed units are almost entirely derived from seawater (see Bjerrum and Canfield, 2002;Konhauser et al., 2007;2009;2015;Robbins et al., 2013).”

    From Trace elements at the intersection of marine biological and geochemical evolution (2016) · cites this paper as Konhauser et al., 2007

  • Because partitioning scenarios depend on matrix effects like varying Si levels and extra cations, they cannot be directly compared.

    “As these partitioning scenarios are sensitive to matrix effects, such as different Si concentrations (e.g., Konhauser et al. (2007Konhauser et al. ( , 2009) ) and the presence of additional cations, (Jones et al. (2015), see also section 4.1), they cannot be directly equated.”

    From Trace elements at the intersection of marine biological and geochemical evolution (2016) · cites this paper as Konhauser et al. (2007

  • Konhauser et al. (2007) showed that high silica in seawater would reduce phosphate adsorption onto precipitating Fe oxyhydroxides, leaving P dissolved while still explaining low P/Fe in iron formations, which undermines the Archean P-crisis idea.

    “Konhauser et al. (2007) demonstrated that a high silica ocean would have attenuated phosphate adsorption to precipitating Fe oxyhydroxides, thereby keeping P in solution while still accounting for low P/Fe ratios in IF (Fig. 4) -and casting doubt on the idea of an Archean P crisis.”

    From Trace elements at the intersection of marine biological and geochemical evolution (2016) · cites this paper as Konhauser et al. (2007)

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Authors
Konhauser, K. O., Lalonde, S. V., Amskold, L., & Holland, H. D.
Affiliations
Harvard University (US)
Corresponding author
Konhauser, Kurt O.
Venue
Science
Published
2007-03-02
Volume
315
Issue
5816
Pages
1234-1234
ISSN
  • 0036-8075 (ISSN-L)
  • 1095-9203
OpenAlex
W2006491332
Cited by
222
References
7
Citations by year
2026: 10 · 2025: 19 · 2024: 20 · 2023: 16 · 2022: 8 · 2021: 14 · 2020: 12 · 2019: 13 · 2018: 15 · 2017: 11 · 2016: 12 · 2015: 11 · 2014: 4 · 2013: 13 · 2012: 12
FWCI
6.05
Type
journal article
Language
en
Open access
closed
Locations
  • Science (publishedVersion)
  • PubMed (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 › Physics and Astronomy › Astronomy and Astrophysics › Origins and Evolution of Life
Keywords
banded iron formations, ferrihydrite, dissolved silica, phosphate adsorption, co-precipitation, ferric oxyhydroxide, phytoplankton productivity, Archean ocean

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