Options
Title
Age and Timing of the Permian Mass Extinctions: U/Pb Geochronology of Closed-System Zircons
Fields of Research (FoR) 2008:
Author(s)
Publication Date
2004
Abstract
The age and timing of the Permian-Triassic mass extinction have been difficult to determine because zircon populations from the type sections are typically affected by pervasive lead loss and contamination by indistinguishable older xenocrysts. Zircons from nine ash beds within the Shangsi and Meishan sections (China), pretreated by annealing followed by partial attack with hydrofluoric acid, result in suites of consistent and concordant uranium/lead (U/Pb) ages, eliminating the effects of lead loss. The U/Pb age of the main pulse of the extinction is 252.6 ± 0.2 million years, synchronous with the Siberian flood volcanism, and it occurred within the quoted uncertainty.
Publication Type
Journal Article
Source of Publication
Science, v.305, p. 1760-1763
Publisher
American Association for the Advancement of Science (AAAS)
Place of Publication
United States of America
ISSN
1095-9203
0036-8075
Peer Reviewed
Yes
HERDC Category Description
Peer Reviewed
Yes
Statistics to Oct 2018:
Visitors: 223<br />Views: 230<br />Downloads: 0
Permanent link to this record