Global ocean redox changes before and during the Toarcian | ResearchBunny

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Abstract

This study investigates the global extent of ocean anoxia and euxinia (anoxic and sulfide-rich conditions) before and during the Toarcian Oceanic Anoxic Event (T-OAE) using rhenium (Re) and molybdenum (Mo) enrichments in organic-rich mudrocks. Mass balance models reveal an expansion of up to ~7% total seafloor anoxia, primarily euxinic, at the T-OAE onset, followed by a contraction before the event's end. These redox trends mirror ammonite and foraminiferal biodiversity patterns.

Publisher

Nature Communications

Published On

Feb 13, 2023

Authors

Alexandra Kunert, Brian Kendall

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