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dc.contributor.authorKonhauser, Kurt O.  Concept link
dc.contributor.authorPlanavsky, Noah J.  Concept link
dc.contributor.authorHardisty, Dalton S.  Concept link
dc.contributor.authorRobbins, Leslie J.  Concept link
dc.contributor.authorWarchola, Tyler J.  Concept link
dc.contributor.authorHaugaard, Rasmus  Concept link
dc.contributor.authorLalonde, Stefan V.  Concept link
dc.contributor.authorPartin, Camille A.  Concept link
dc.contributor.authorOonk, Paul B. H.  Concept link
dc.contributor.authorTsikos, Harilaos  Concept link
dc.contributor.authorLyons, Timothy W.  Concept link
dc.contributor.authorBekker, Andrey  Concept link
dc.contributor.authorJohnson, Clark M.  Concept link
dc.date.accessioned2017-10-31T17:37:40Z
dc.date.issued2017-06-25
dc.identifier.urihttps://hdl.handle.net/1912/9332
dc.description© The Author(s), 2017. This is the author's version of the work. It is posted here under a nonexclusive, irrevocable, paid-up, worldwide license granted to WHOI. It is made available for personal use, not for redistribution. The definitive version was published in Earth-Science Reviews 172 (2017): 140-177, doi:10.1016/j.earscirev.2017.06.012.en_US
dc.description.abstractIron formations (IF) represent an iron-rich rock type that typifies many Archaean and Proterozoic supracrustal successions and are chemical archives of Precambrian seawater chemistry and postdepositional iron cycling. Given that IF accumulated on the seafloor for over two billion years of Earth’s early history, changes in their chemical, mineralogical, and isotopic compositions offer a unique glimpse into environmental changes that took place on the evolving Earth. Perhaps one of the most significant events was the transition from an anoxic planet to one where oxygen was persistently present within the marine water column and atmosphere. Linked to this progressive global oxygenation was the evolution of aerobic microbial metabolisms that fundamentally influenced continental weathering processes, the supply of nutrients to the oceans, and, ultimately, diversification of the biosphere and complex life forms. Many of the key recent innovations in understanding IF genesis are linked to geobiology, since biologically assisted Fe(II) oxidation, either directly through photoferrotrophy, or indirectly through oxygenic photosynthesis, provides a process for IF deposition from mineral precursors. The abundance and isotope composition of Fe(II)-bearing minerals in IF additionally suggests microbial Fe(III) reduction, a metabolism that is deeply rooted in the Archaea and Bacteria. Linkages among geobiology, hydrothermal systems, and deposition of IF have been traditionally overlooked, but now form a coherent model for this unique rock type. This paper reviews the defining features of IF and their distribution through the Neoarchaean and Palaeoproterozoic. This paper is an update of previous reviews by Bekker et al. (2010, 2014) that will improve the quantitative framework we use to interpret IF deposition. In this work, we also discuss how recent discoveries have provided new insights into the processes underpinning the global rise in atmospheric oxygen and the geochemical evolution of the oceans.en_US
dc.description.sponsorshipKOK, TJW, RH, CAP and AB would like to thank the Natural Sciences and Engineering Research Council of Canada (NSERC) for its financial support. LJR gratefully acknowledges the support of a Vanier Canada Graduate Scholarship. CMJ, DSH, NJP and TWL acknowledge support from the NASA Astrobiology Institute. SVL acknowledges support from the European Institute for Marine Studies (LabexMER, ANR-10-LABX-19). HT and PBHO thank ASSMANG Ltd for providing research funding.en_US
dc.language.isoen_USen_US
dc.relation.urihttps://doi.org/10.1016/j.earscirev.2017.06.012
dc.titleIron formations: A global record of Neoarchaean to Palaeoproterozoic environmental historyen_US
dc.typePreprinten_US


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