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The Permian-Triassic boundary and mass extinction in China

Metcalfe, Ian; Nicoll, Robert; Mundil, Roland; Foster, C B; Glen, J; Lyons, John; Wang, X-D; Cheng Yuan, Wang; Renne, P R; Black, Lance; Xun, Qu; Xiaodong, Mao

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The first appearance of Hindeodus parvus (Kozur & Pjatakova) at the Permian-Triassic (P-T) GSSP level (base of Bed 27c) at Meishan is here confirmed. Hindeodus changxingensis Wang occurs from Beds 26 to 29 at Meishan and appears to be restricted to the narrow boundary interval immediately above the main mass extinction level in Bed 25. It is suggested that this species is therefore a valuable P-T boundary interval index taxon. Our collections from the Shangsi section confirm that the first...[Show more]

dc.contributor.authorMetcalfe, Ian
dc.contributor.authorNicoll, Robert
dc.contributor.authorMundil, Roland
dc.contributor.authorFoster, C B
dc.contributor.authorGlen, J
dc.contributor.authorLyons, John
dc.contributor.authorWang, X-D
dc.contributor.authorCheng Yuan, Wang
dc.contributor.authorRenne, P R
dc.contributor.authorBlack, Lance
dc.contributor.authorXun, Qu
dc.contributor.authorXiaodong, Mao
dc.date.accessioned2015-12-10T22:39:27Z
dc.date.available2015-12-10T22:39:27Z
dc.identifier.issn0705-3797
dc.identifier.urihttp://hdl.handle.net/1885/57179
dc.description.abstractThe first appearance of Hindeodus parvus (Kozur & Pjatakova) at the Permian-Triassic (P-T) GSSP level (base of Bed 27c) at Meishan is here confirmed. Hindeodus changxingensis Wang occurs from Beds 26 to 29 at Meishan and appears to be restricted to the narrow boundary interval immediately above the main mass extinction level in Bed 25. It is suggested that this species is therefore a valuable P-T boundary interval index taxon. Our collections from the Shangsi section confirm that the first occurrence of Hindeodus parvus in that section is about 5 in above the highest level from which a typical Permian fauna is recovered. This may suggest that that some section may be missing at Meishan. The age of the currently defined Permian-Triassic Boundary is estimated by our own studies and a reassessment of previous worker's data at c. 253 Ma, slightly older than our IDTIMS 206Pb/238U age of 252.5 ±0.3 Ma for Bed 28, just 8 cm above the GSSP boundary (Mundil et al., 2001). The age of the main mass extinction, at the base of Bed 25 at Meishan, is estimated at slightly older than 254 Ma based on an age of >254 Ma for the Bed 25 ash. Regardless of the absolute age of the boundary, it is evident that the claimed <165,000 y short duration for the negative carbon isotope excursion at the P-T boundary (Bowring et al., 1998) cannot be confirmed. Purportedly extraterrestrial fullerenes at the boundary (Hecker et al., 2001) have equivocal significance due to their chronostratigraphic non-uniqueness and their occurrence in a volcanic ash.
dc.publisherInternational Union of Geological Sciences
dc.sourceEpisodes
dc.titleThe Permian-Triassic boundary and mass extinction in China
dc.typeJournal article
local.description.notesImported from ARIES
local.description.refereedYes
local.identifier.citationvolume24
dc.date.issued2001
local.identifier.absfor040308 - Palaeontology (incl. Palynology)
local.identifier.ariespublicationMigratedxPub390
local.type.statusPublished Version
local.contributor.affiliationMetcalfe, Ian, University of New England
local.contributor.affiliationNicoll, Robert, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationMundil, Roland, Berkeley Geochronology Center
local.contributor.affiliationFoster, C B, Australian Geological Survey Organisation
local.contributor.affiliationGlen, J, University of California
local.contributor.affiliationLyons, John, University of California
local.contributor.affiliationWang, X-D, Academia Sinica
local.contributor.affiliationCheng Yuan, Wang, Academia Sinica
local.contributor.affiliationRenne, P R, Berkeley Geochronology Center
local.contributor.affiliationBlack, Lance, Geoscience Australia
local.contributor.affiliationXun, Qu, Institute of Geology and Mineral Resources
local.contributor.affiliationXiaodong, Mao, Centre for Stratigraphy and Palaeontology
local.bibliographicCitation.issue4
local.bibliographicCitation.startpage239
local.bibliographicCitation.lastpage244
dc.date.updated2015-12-09T10:51:23Z
local.identifier.scopusID2-s2.0-0035541715
CollectionsANU Research Publications

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