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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.
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 provinceCarbon-isotope stratigraphyJurassic boundaryTriassic/jurassic boundaryAge constraintsZirconRecordSynchronyEventDifferentiation
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Research group Isotope Geochemistry, Geochronology and Thermochronology
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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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