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A minimum U-Pb age for Siberian flood-basalt volcanism

Geochimica et Cosmochimica Acta

By:
, , and
DOI: 10.1016/0016-7037(96)00173-1

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Abstract

Establishing an accurate and precise age for Siberian flood-basalt volcanism is of great importance in evaluating causes for the unequaled mass extinction of flora and fauna at the Permian-Triassic boundary. We report a new, minimum U-Pb age obtained from zircon and baddeleyite from the mineralized Noril'sk I intrusion that cuts the lower third of this rapidly deposited, 3500-m-thick volcanic sequence near Noril'sk. This 251.2 ?? 0.3 (2??) Ma age is within analytical error of the SHRIMP U-Pb age for zircon from the Permian-Triassic boundary at Meishan, South China [251.1 ?? 3.6 Ma (2??)], and confirms Siberian basaltic volcanism as a possible contributor to the mass extinction.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
A minimum U-Pb age for Siberian flood-basalt volcanism
Series title:
Geochimica et Cosmochimica Acta
DOI:
10.1016/0016-7037(96)00173-1
Volume
60
Issue:
18
Year Published:
1996
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Geochimica et Cosmochimica Acta
First page:
3505
Last page:
3511
Number of Pages:
7