Millimeter-scale variations of stable isotope abundances in carbonates from Banded Iron-Formations in the Hamersley Group of Western Australia

M. E. Baur; J. M. Hayes; S. A. Studley; M. R. Walter

doi:10.2113/gsecongeo.80.2.270

Millimeter-scale variations of stable isotope abundances in carbonates from Banded Iron-Formations in the Hamersley Group of Western Australia

M. E. Baur, J. M. Hayes, S. A. Studley, M. R. Walter

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116 Citations (Scopus)

Abstract

Two outstanding features appear in this study. One is the overall low measures of ¹³C and ¹⁸O in the banded iron- formation carbonates. The other is the statistically significant and locally pronounced alternation in isotopic composition between adjacent zones and microbands, with carbon and oxygen isotopically lighter where more iron oxide is present. A biological origin is favoured for the correlated variations in ¹³C and Fe. The low ¹³C of the carbonates may be derived from fermentative metabolism or from anaerobic respiration. -G.J.N.

Original language	English
Pages (from-to)	270-282
Number of pages	13
Journal	Economic Geology
Volume	80
Issue number	2
DOIs	https://doi.org/10.2113/gsecongeo.80.2.270
Publication status	Published - 1985
Externally published	Yes

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abstract = "Two outstanding features appear in this study. One is the overall low measures of 13C and 18O in the banded iron- formation carbonates. The other is the statistically significant and locally pronounced alternation in isotopic composition between adjacent zones and microbands, with carbon and oxygen isotopically lighter where more iron oxide is present. A biological origin is favoured for the correlated variations in 13C and Fe. The low 13C of the carbonates may be derived from fermentative metabolism or from anaerobic respiration. -G.J.N.",

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PY - 1985

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AB - Two outstanding features appear in this study. One is the overall low measures of 13C and 18O in the banded iron- formation carbonates. The other is the statistically significant and locally pronounced alternation in isotopic composition between adjacent zones and microbands, with carbon and oxygen isotopically lighter where more iron oxide is present. A biological origin is favoured for the correlated variations in 13C and Fe. The low 13C of the carbonates may be derived from fermentative metabolism or from anaerobic respiration. -G.J.N.

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Millimeter-scale variations of stable isotope abundances in carbonates from Banded Iron-Formations in the Hamersley Group of Western Australia

Abstract

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