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

doi:10.1038/s41598-020-60483-8

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

^*Corresponding author for this work

Department of Geoscience - Earth System Petrology

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

15 Citations (Scopus)

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 language	English
Article number	3482
Journal	Scientific Reports
Volume	10
Issue	1
Number of pages	8
ISSN	2045-2322
DOIs	https://doi.org/10.1038/s41598-020-60483-8
Publication status	Published - 2020

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10.1038/s41598-020-60483-8Licence: CC BY

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title = "Platinum-group elements link the end-Triassic mass extinction and the Central Atlantic Magmatic Province",

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.",

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AU - Tegner, Christian

AU - Marzoli, Andrea

AU - McDonald, Iain

AU - Youbi, Nasrrddine

AU - Lindström, Sofie

PY - 2020

Y1 - 2020

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AB - 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.

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

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