Minimal biomass deposition in banded iron formations inferred from organic matter and clay relationships

Matthew S. Dodd (), Dominic Papineau, Franco Pirajno, Yusheng Wan and Juha A. Karhu
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Matthew S. Dodd: University College London
Dominic Papineau: University College London
Franco Pirajno: The University of Western Australia
Yusheng Wan: Institute of Geology, Chinese Academy of Geological Sciences
Juha A. Karhu: University of Helsinki

Nature Communications, 2019, vol. 10, issue 1, 1-13

Abstract: Abstract The cycling of iron and organic matter (OM) is thought to have been a major biogeochemical cycle in the early ferruginous oceans which contributed to the deposition of banded iron formations (BIF). However, BIF are deficient in OM, which is postulated to be the result of near-complete oxidation of OM during iron reduction. We test this idea by documenting the prevalence of OM in clays within BIF and clays in shales associated with BIF. We find in shales >80% of OM occurs in clays, but

Date: 2019
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DOI: 10.1038/s41467-019-12975-z

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