Cited by 177Paleontology and Stratigraphy of FossilsGeochemistry and Elemental AnalysisGeological and Geochemical Analysis

The chromium isotopic composition of seawater and marine carbonates

Open access
Bonnand, P., James, R.H., Parkinson, I.J., Connelly, D.P., Fairchild, I.J.·2013·Earth and Planetary Science Letters

Abstract

Chromium isotopes are fractionated during redox reactions and have the potential to provide a record of changes in the oxygenation levels of the oceans in the geological past. However, Cr is a trace metal in seawater and its low concentrations make isotopic measurements challenging. Here we report the first determinations of δCr53 for seawater from open ocean (Argentine Basin) and coastal (Southampton Water) settings, using a double-spike technique. The total chromium concentration in seawater from Southampton Water is 1.85 nM, whereas the Cr content of Argentine Basin samples is 5.8–6.6 nM. The δCr53 value of seawater from the Argentine Basin is 0.491–0.556‰ in intermediate and deep waters, and varies between 0.412 and 0.664‰ in surface waters (<150 m). The δCr53 value of Southampton Water seawater is 1.505‰, which may reflect in situ reduction of Cr(VI) to Cr(III). All of our seawater samples have higher δCr53 than crustal and mantle silicates, and mass balance modelling demonstrates that river water must also be enriched in heavy Cr isotopes, indicating that Cr isotopes are fractionated during weathering and/or during transport to the oceans. We also show that the Cr isotopic composition of modern non-skeletal marine carbonates (0.640– 0.745‰) encompasses the range that we measure for Argentine Basin seawater. Thus, fractionation of Cr isotopes during precipitation of these marine carbonates is likely to be small (<0.2‰), and they have the potential to provide a record of the Cr isotopic composition of ancient seawater. Phanerozoic carbonates are also characterised by heavy δCr53 and a correlation between δCr53 and Ce/Ce⁎ suggests that the Cr and Ce cycles in the ocean are linked.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1016/j.epsl.2013.09.001

Cites

83 of 83 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • The riverine Cr flux to the oceans is isotopically heavy relative to upper continental crust, based on experiments and δ53Cr data from South American rivers, Indian river waters, and global seawater.

    “Heavy-isotope ( 53 Cr) enrichment of the riverine Cr flux to the oceans relative to upper continental crust (UCC) is indicated both by experimental results and by empirical δ 53 Cr data from”

    From The chromium isotope composition of reducing and oxic marine sediments (2016) · cites this paper as Bonnand et al., 2013

  • Carbonates and oxic siliciclastic sediments make up a relatively small part of the oceanic Cr sink, and their Cr isotope compositions are not expected to be strongly fractionated relative to the oceanic pool.

    “carbonates and oxic siliciclastic sediments are thought to account for a relatively small fraction of the Cr sink flux in the oceanic Cr budget, and the Cr isotope compositions of these facies are not expected to be strongly fractionated relative to the oceanic pool”

    From The chromium isotope composition of reducing and oxic marine sediments (2016) · cites this paper as Bonnand et al., 2013

  • The average Peru Margin δ53Cr values are similar to deep Atlantic and Pacific seawater values.

    “despite being similar to deep Atlantic and Pacific seawater and strikingly invariant”

    From The chromium isotope composition of reducing and oxic marine sediments (2016) · cites this paper as Bonnand et al., 2013

  • Cariaco Basin core-top samples exhibit a range of bulk sediment δ53Cr values, with some as heavy as Atlantic seawater values and others comparatively lighter.

    “The Cariaco Basin core-top samples exhibit a range of bulk sediment δ 53 Cr values, with some as heavy as Atlantic seawater values (Bonnand et al., 2013) and others comparatively lighter (e.g., samples 4 and 7 in Fig. 5).”

    From The chromium isotope composition of reducing and oxic marine sediments (2016) · cites this paper as Bonnand et al., 2013

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

1 of the 84 references couldn’t be matched to a known paper.

Research works printed but not linked: 4

  1. Dolamore-Frank, J.A., 1984. The analysis, occurrence and chemical speciation of zinc and chromium in natural waters. PhD Thesis. University of Southampton, UK. http://refhub.elsevier.com/S0012-821X(1300497-4/bib4472616574616C32303039s1)
  2. Ghaddaf, M.A., 1990. Dissolved chromium speciation in estuarine and sea water and trace metal speciation in sediments, eolian dust and surface water particulates from N.E. Atlantic. PhD Thesis. University of Liverpool, UK.
  3. Kisakurek, B., James, R.H., Harris, N.B.W., 2005. Li and delta Li-7 in Himalayan rivers: http://refhub.elsevier.com/S0012-821X(1300497-4/bib4B69736574616C32303035s1)
  4. Zektser, I.S., Everett, L.G., Dzhamalov, R.G., 2007. Submarine Goundwater. CRC Press, Boca Raton, FL.

Cited by

Sorted by citations

Authors
Bonnand, P., James, R. H., Parkinson, I. J., Connelly, D. P., & Fairchild, I. J.
Affiliations
  • The Open University (GB)
  • National Oceanography Centre (GB)
  • University of Birmingham (GB)
Corresponding author
Bonnand, P.
Venue
Earth and Planetary Science Letters
Publisher
Elsevier BV
Published
2013-11
Volume
382
Pages
10-20
ISSN
0012-821X (ISSN-L)
OpenAlex
W2066760610
Cited by
177
References
84
Citations by year
2026: 5 · 2025: 10 · 2024: 7 · 2023: 13 · 2022: 10 · 2021: 32 · 2020: 17 · 2019: 22 · 2018: 21 · 2017: 8 · 2016: 19 · 2015: 10 · 2014: 3
FWCI
7.26
Type
journal article
Language
en
Open access
Locations
  • Earth and Planetary Science Letters (publishedVersion, cc-by)
  • Bristol Research (University of Bristol) (publishedVersion)
  • NERC Open Research Archive (Natural Environment Research Council) (acceptedVersion)
  • ePrints Soton (University of Southampton) (acceptedVersion)
  • University of Birmingham Research Portal (University of Birmingham) (submittedVersion, cc-by)
  • Explore Bristol Research (submittedVersion)
Funders
  • Open University
  • Philip Leverhulme Prize (PLP/2006/0050)
  • RHJ
  • NERC (NE/H006443/1)
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 › Geophysics › Geological and Geochemical Analysis
Keywords
chromium isotopes, seawater, marine carbonates, ocean oxygenation, hexavalent chromium reduction, weathering, mass balance model, Argentine Basin, Southampton Water

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review