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

Tegner, Christian, Marzoli, Andrea, McDonald, Iain, Youbi, Nasrrddine and Lindström, Sofie 2020. Platinum-group elements link the end-Triassic mass extinction and the Central Atlantic Magmatic Province. Scientific Reports 10 , 3482. 10.1038/s41598-020-60483-8

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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.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Earth and Ocean Sciences
Additional Information: This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) licence
Publisher: Nature Publishing Group
ISSN: 2045-2322
Date of First Compliant Deposit: 27 March 2020
Date of Acceptance: 7 February 2020
Last Modified: 21 Oct 2020 11:15
URI: http://orca.cardiff.ac.uk/id/eprint/130616

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