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

The DOI matches its Crossref record; 43 of the 46 references it cites were found in a registry or an index.

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.

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

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Show all 46 references

Research works printed but not linked: 10

  1. Davy, 1975, A geochemical study of a dolomite-BIF transition in the lower part of the Hamersley Group, Geol. Surv. W. Australia Annual Rept. 1974, 88
  2. Davy, 1977, The value of B-Ga-Rb diagrams in determining depositional conditions in Proterozoic rocks in the northwest of Western Australia, Geol. Surv. W. Australia Annual Rept. 1976, 80
  3. Dimroth, 1968, Sedimentary textures, diagenesis and sedimentary environment of certain Precambrian ironstones, N. Jahrb. Geol. Palaontol., 130, 247
  4. Klein, 1974, Greenalite, stilpnomelane, minnesotaite, crocidolite and carbonates in a very low-grade metamorphic Precambrian iron-formation, Canadian Mineral., 12, 475
  5. MacLeod, 1966, The geology and iron deposits of the Hamersley Range area, Geol. Surv. W. Aust. Bull, 117
  6. Miyano, 1984, Phase relations of stilpnomelane, ferri-annite, and reibeckite in very low-grade metamorphosed iron-formations, Trans. Geol. Surv. S. Africa, 87, 111
  7. Müller, 1986, The metamorphic grade of banded iron-formations: Oxygen isotope and petrologic constraints, Fortschr. Mineral., 64, 163
  8. Thorne, 1983, Upward-shallowing sequences in the Precambrian Duck Creek Dolomite, Western Australia, Geol. Surv. W. Australia Prof. Pap., 1983, 81
  9. Trendall, 1970, The iron formations of the Precambrian Hamersley Group, Western Australia, with special reference to the associated crocidolite, Geol. Surv. W. Australia Bull., 119, 366
  10. Trendall, 1977, Chemical composition of the Brockman Iron Formation, Geol. Surv. W. Australia Rec. No. 1976/25

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Metadata

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 › Geochemistry and Petrology › 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

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