Cited by 144Paleontology and Stratigraphy of FossilsGeochemistry and Elemental AnalysisGeological and Geochemical Analysis

Primary and diagenetic controls of isotopic compositions of iron-formation carbonates

Kaufman, Alan J., Hayes, J.M., Klein, C.·1990·Geochimica et Cosmochimica Acta

Abstract

Mineralogic, chemical, and isotopic compositions have been determined for 97 carbonate microbands in five core segments from the early Proterozoic (2.5 Ga) Dales Gorge Member of the Brockman Iron Formation, Hamersley Basin, Western Australia. Samples were obtained both from banded iron-formation (BIF) macrobands 9-12 at Paraburdoo, on the southern margin of the basin, and from BIF macroband 13 at Wittenoom, 130 km NW. At Paraburdoo, oxygen-isotopic compositions of coexisting chert and magnetite microbands were measured and indicated final equilibration temperatures ranging from 60-160 degrees C. This range is consistent with observed mineral assemblages and indicates a considerable temperature gradient across the basin (cf. T approximately 300 degrees C at Wittenoom; BECKER and CLAYTON, 1976). Carbon-isotopic compositions of carbonates are near -7% vs. PDB at Paraburdoo and -10.5% at Wittenoom, but the greater isotopic depletion at Wittenoom appears related to primary or diagenetic processes, not metamorphism. Contents of organic carbon are consistently low. Isotopic depletion is roughly correlated with iron abundance and, together with petrographic observations and chemical balances, is consistent with the model of BIF deposition introduced by BEUKES et al. (1990): primary siderite (delta approximately -5%) precipitated from an anoxic water column depleted in 13C; additional depletion of 13C is associated with coprecipitation of iron oxides and organic carbon. Oxygen-isotopic abundances of microbanded carbonates are similar to those under- and overlying massive marine carbonates, ranging from 17.6 to 21.0% vs. SMOW (-9.6 to -12.9% vs. PDB). Millimeter-scale variations in abundances of 13C and 18O are associated with diagenetic replacement of primary siderite by secondary ankerite and/or magnetite. It is shown that these isotopic variations cannot result from mineral-dependent fractionations, metamorphism, or the influence of large volumes of water in an open system.

Integrity signals

Registry

Crossref · 10.1016/0016-7037(90)90298-y

Cites

43 of 43 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

This paper’s full text isn’t openly available, so its claims and self-check weren’t run. The registry and citation checks still apply.

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?

  • Greenalite has been identified in chert layers from several Palaeoproterozoic IFs, including the Brockman Iron Formation and the Transvaal Supergroup.

    “Greenalite has been identified in chert layers from several Palaeoproterozoic IFs, including the Brockman Iron Formation in Western Australia (Kaufman et al., 1990; Rasmussen et al., 2015; 2016) and the Transvaal Supergroup in South Africa (Rasmussen et al., 2017).”

Cites

Flagged first, then by citations

3 of the 46 references couldn’t be matched to a known paper.

Cited by

Sorted by citations

Authors
Kaufman, A. J., Hayes, J. M., & Klein, C.
Affiliations
  • Indiana University Bloomington (US)
  • University of New Mexico (US)
Venue
Geochimica et Cosmochimica Acta
Publisher
Elsevier BV
Published
1990-12
Volume
54
Issue
12
Pages
3461-3473
ISSN
0016-7037 (ISSN-L)
OpenAlex
W2028590108
Cited by
144
References
46
Citations by year
2026: 1 · 2025: 6 · 2024: 3 · 2023: 5 · 2022: 10 · 2021: 4 · 2020: 7 · 2019: 7 · 2018: 8 · 2017: 9 · 2016: 6 · 2015: 8 · 2014: 5 · 2013: 7 · 2012: 3
FWCI
4.22
Type
journal article
Language
en
Open access
closed
Locations
  • Geochimica et Cosmochimica Acta (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 › Earth and Planetary Sciences › Geophysics › Geological and Geochemical Analysis
Keywords
banded iron formations, carbon isotopes, oxygen isotopes, siderite, ankerite, magnetite, diagenesis, Early Proterozoic, Hamersley Basin, chert, organic carbon, iron oxide, anoxic water column, isotope fractionation
MeSH terms
Carbon, Carbon Isotopes, Carbonates, Geology, Iron, Minerals, Oxygen Isotopes, Quartz, Temperature, Western Australia, Geological Phenomena

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