Platinum-group elements link the end-Triassic mass extinction and the Central Atlantic Magmatic Province

Christian Tegner, Andrea Marzoli, Iain McDonald, Nasrrddine Youbi, Sofie Lindström

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    Abstract

    Elevated concentrations of iridium (Ir) and other platinum-group elements (PGE) have been reported in both terrestrial and marine sediments associated with the end-Triassic mass extinction (ETE) c. 201.5 million years ago. The source of the PGEs has been attributed to condensed vapor and melt from an extraterrestrial impactor or to volcanism. Here we report new PGE data for volcanic rocks of the Central Atlantic Magmatic Province (CAMP) in Morocco and show that their Pd/Ir, Pt/Ir and Pt/Rh ratios are similar to marine and terrestrial sediments at the ETE, and very different from potential impactors. Hence, we propose the PGEs provide a new temporal correlation of CAMP volcanism to the ETE, corroborating the view that mass extinctions may be caused by volcanism.

    Original languageEnglish
    Article number3482
    Number of pages8
    JournalScientific Reports
    Volume10
    DOIs
    Publication statusPublished - 2020

    Programme Area

    • Programme Area 3: Energy Resources

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