Redox fluctuation and δ13Corg-δ34S perturbations recorded in the 1.9 Ga Nuvilik Formation of the Cape Smith belt, Canada

Kento Motomura,Shoichi Kiyokawa,Minoru Ikehara,Takashi Sano,Wouter Bleeker,Kentaro Tanaka,Tsubasa Miki,Yuji Sano

Precambrian Research（2021）

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摘要

•We describe a 50-m-thick section of the ca. 1.9 Ga Nuvilik Formation.•Trace-element compositions, δ13Corg, and δ34S were determined for shale samples.•V, Mo, and U contents reveal redox fluctuations from suboxic to sulfidic conditions.•1.88 Ga Circum-Superior LIP activities may have related to the redox fluctuations.

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关键词

Paleoproterozoic,Nuvilik Formation,Ocean redox fluctuation,Negative δ13Corg shift,Negative δ34S excursion

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