Stratigraphy and geochronological constraints of the Serra Sul Formation (Carajás Basin, Amazonian Craton, Brazil)

Abstract

This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

Anoxygenic photosynthesis linked to Neoarchean iron formations in Carajás (Brazil)

“…A Late Archean to Early Paleoproterozoic sedimentary cover overlies the IFs; however, its age is still debated (Rossignol et al, 2020). The depositional age of the Carajás IFs is well constrained by U-Pb zircon ages of c. 2.755-2.740 Ga in the basalts underlying and intercalating the IFs (Gibbs et al, 1986;Krymsky et al, 2007;Machado et al, 1991) and U-Pb zircon ages from a possible tuff (2,743 ± 11 Ma) and a dolerite dyke (2,740 ± 8 Ma) cross-cutting the Carajás Formation (Trendall et al, 1998).…”