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Title: New Middle Permian - Early Triassic U-Pb zircon CA-IDTIMS isotopic ages of tuffs in the Sydney Basin, Australia: International calibration of stratigraphy and biostratigraphy
Contributor(s): Metcalfe, Ian  (author); Nicoll, RS (author); Crowley, J (author); Ives, M (author); Mantle, D (author); Ruming, K (author); Huyskens, M (author); Foster, CB (author)
Publication Date: 2011
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Abstract: The Middle Permian-Early Triassic (MP-ET) of Eastern Australia contains a predominantly endemic biota precluding precise correlation with standard international biozones and System/Stage boundaries. The Permian-Triassic boundary, other MP-ET stage boundary levels, and the major end-Guadalupian and end-Permian mass extinction levels in Australia remain poorly constrained. Attempts to calibrate the MP-ET of Australia using Sensitive High Resolution Ion Microprobe techniques have resulted in controversial radioisotopic ages with percent-level uncertainty and compromised accuracy due to the use of an unsuitable standard. We here report eighteen new high-precision (<±0.05 my) U-Pb CA-IDTIMS ages for tuffs in the Sydney Basin based on isotopic dating of chemically abraded individual zircons. These dates provide vital international timescale tie points for the MP-ET of Australia.
Publication Type: Conference Publication
Conference Name: ICCP 2011: XVII International Congress on the Carboniferous and Permian, Perth, Australia, 3rd - 8th July, 2011
Conference Details: ICCP 2011: XVII International Congress on the Carboniferous and Permian, Perth, Australia, 3rd - 8th July, 2011
Source of Publication: Programme & Abstracts: The XVII International Congress on the Carboniferous and Permian, p. 92-92
Publisher: Geological Survey of Western Australia
Place of Publication: Perth, Australia
Field of Research (FOR): 040303 Geochronology
HERDC Category Description: E3 Extract of Scholarly Conference Publication
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Series Name: Geological Survey of Western Australia Record
Series Number : 2011/20
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