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Title: Comment on ''U-Pb calcite age of the Late Permian Castile Formation, Delaware Basin: A constraint on the age of the Permian-Triassic boundary (?)'' by M.L. Becker et al. [Earth Planet. Sci. Lett. 203 (2002) 681-689]
Contributor(s): Metcalfe, Ian  (author)
Publication Date: 2004
DOI: 10.1016/S0012-821X(03)00603-4
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Abstract: Becker et al. in their recent paper have proposed a U-Pb calcite age of 251.5±2.8 Ma for the Castile Formation of the Delaware Basin, and infer that the age of the Permian-Triassic boundary should be younger than this age. In addition, Becker et al. imply that U-Pb ages on organic-rich calcite are more accurate than combined U-Pb zircon and Ar/Ar sanidine/biotite ages from volcanic ash falls. I here challenge the accuracy of the Castile Formation calcite age, and in particular, the proposed constraint on the age of the Permian-Triassic boundary.
Publication Type: Journal Article
Source of Publication: Earth and Planetary Science Letters, 217(3-4), p. 465-468
Publisher: Pergamon
Place of Publication: Amsterdam, The Netherlands
ISSN: 1385-013X
Field of Research (FOR): 040303 Geochronology
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
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