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Title

Correlating the end-Triassic mass extinction and flood basalt volcanism at the 100 ka level
Authors
Schoene, B.
Guex, J.
Bartolini, A.
Schaltegger, Urs
Blackburn, T. J.
Published in Geology. 2010, vol. 38, no. 5, p. 387-390
Abstract New high-precision U/Pb geochronology from volcanic ashes shows that the Triassic-Jurassic boundary and end-Triassic biological crisis from two independent marine stratigraphic sections correlate with the onset of terrestrial flood volcanism in the Central Atlantic Magmatic Province to <150 ka. This narrows the correlation between volcanism and mass extinction by an order of magnitude for any such catastrophe in Earth history. We also show that a concomitant drop and rise in sea level and negative delta(13)C spike in the very latest Triassic occurred locally in <290 ka. Such rapid sea-level fluctuations on a global scale require that global cooling and glaciation were closely associated with the end-Triassic extinction and potentially driven by Central Atlantic Magmatic Province volcanism
Keywords Atlantic magmatic province — Carbon-isotope stratigraphy — Jurassic boundary — Triassic/jurassic boundary — Age constraints — Zircon — Record — Synchrony — Event — Differentiation
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Article (Published version) (209 Kb) - private document Private access
Other version: http://geology.gsapubs.org/cgi/doi/10.1130/G30683.1
Structures
Faculté des sciences / Section des sciences de la Terre et de l'Environnement / Département des sciences de la Terre
Research group Isotope Geochemistry, Geochronology and Thermochronology
Citation
(ISO format) 		SCHOENE, B. et al. Correlating the end-Triassic mass extinction and flood basalt volcanism at the 100 ka level. In: Geology, 2010, vol. 38, n° 5, p. 387-390. https://archive-ouverte.unige.ch/unige:21549

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Deposited on : 2012-06-11

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