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dc.contributor.authorEvans, Katy
dc.contributor.authorMcCuaig, T.
dc.contributor.authorLeach, D.
dc.contributor.authorAngerer, T.
dc.contributor.authorHagemann, S.
dc.date.accessioned2017-01-30T12:17:29Z
dc.date.available2017-01-30T12:17:29Z
dc.date.created2013-02-28T20:00:40Z
dc.date.issued2013
dc.identifier.citationEvans, K.A. and McCuaig, T.C. and Leach, D. and Angerer, T. and Hagemann, S.G. 2013. Banded iron formation to iron ore: a record of the evolution of Earth environments? Geology. 41 (2): pp. 99-102.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/20126
dc.identifier.doi10.1130/G33244.1
dc.description.abstract

Banded iron formations (BIF) are the protolith to most of the world’s largest iron ore deposits. Previous hypogene genetic models for Paleoproterozoic “Lake Superior” BIF-hosted deposits invoke upwards, down-temperature flow of basinal brines via complex silica and carbonate precipitation/dissolution processes. Such models are challenged by the necessary SiO2 removal. Thermodynamic and mass balance constraints are used to refine conceptual models of the formation of BIF-hosted iron-ore. These constraints, plus existing isotope and halogen ratio evidence, are consistent with removal of silica by down- or up-directed infiltration of high-pH hypersaline brines, with or without a contribution from basinal brines. The proposed link to surface environments suggest that Paleoproterozoic BIF-ore upgrade may provide a record of a critical time in the evolution of the Earth’s biosphere and hydrosphere.

dc.publisherGeological Society of America
dc.subjectBIF
dc.subjectoxygen
dc.subjectatmosphere
dc.subjectsulfur
dc.subjectevolution
dc.titleBanded iron formation to iron ore: a record of the evolution of Earth environments?
dc.typeJournal Article
dcterms.source.volume41
dcterms.source.startPage99
dcterms.source.endPage102
dcterms.source.issn0091-7613
dcterms.source.titleGeology
curtin.department
curtin.accessStatusOpen access


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