Comment on “Correlation of the stratigraphic cover of the Pilbara and Kaapvaal cratons recording the lead up to Paleoproterozoic Icehouse and the GOE” by Andrey Bekker, Bryan Krapež, and Juha A. Karhu, 2020, Earth Science Reviews, https://doi.org/10.1016/j.earscirev.2020.103389
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Killingsworth, BA
Paquette, JL
Tessalina, S
Cartigny, P
Lalonde, SV
Thomazo, C
Ávila, JN
Busigny, V
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Abstract
The re-interpretation by Bekker et al. (2020) of the chronology of the Turee Creek Basin suggests that its C- and S-isotope records span only 2.45 to 2.42 Ga, instead of ~2.45 to 2.20 Ga, with significant implications for our understanding of the earliest rise of atmospheric oxygen. The comparison they made between the sedimentary and geochemical records of the Pilbara and Kaapvaal cratons is indeed important, as our knowledge of the Great Oxidation Event (GOE) is thus far dominated by evidence from one craton, the Kaapvaal, partly because of its geochronologic constraints. Meanwhile, for the Pilbara, the interpretation by Bekker et al. (2020) preempts other published works on the stratigraphic sequence, geochronology, geochemistry and geotectonic setting for the Turee Creek Group (Thorne and Seymour, 1991; Tyler and Thorne, 1990; Powell and Horwitz, 1994; Powell et al., 1999; Martin, 1999; Martin, 2020; Martin and Morris, 2010; Martin et al., 1998, Martin et al., 2000; Mazumder and Van Kranendonk, 2013; Mazumder et al., 2015; Van Kranendonk and Mazumder, 2015; Van Kranendonk et al., 2015; Caquineau et al., 2018; Philippot et al., 2018; Killingsworth et al., 2019; Chen et al., 2019). The problem with understanding the geochronology of Turee Creek has been a lack of absolute age constraints, with recent progress in that regard (Caquineau et al., 2018; Philippot et al., 2018) being dismissed by this new study, which instead relies on a sequence stratigraphy approach that i) requires assumption of a specific basinal setting for the deposition of the Turee Creek sequence and ii) considers C isotope regional chemostratigraphy of carbonate rocks as a paleo-indicator of unequivocal global significance.
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Philippot, P; Killingsworth, BA; Paquette, JL; Tessalina, S; Cartigny, P; Lalonde, SV; Thomazo, C; Ávila, JN; Busigny, V, Comment on “Correlation of the stratigraphic cover of the Pilbara and Kaapvaal cratons recording the lead up to Paleoproterozoic Icehouse and the GOE” by Andrey Bekker, Bryan Krapež, and Juha A. Karhu, 2020, Earth Science Reviews, https://doi.org/10.1016/j.earscirev.2020.103389, Earth-Science Reviews, 2021