Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/11275
Title: Wordian (Middle Permian) U-Pb CA-IDTIMS isotopic ages from the Lightjack Formation, Canning Basin, Western Australia
Contributor(s): Mory, Arthur J (author); Crowley, Jim (author); Nicoll, Robert S (author); Metcalfe, Ian  (author); Mantle, Daniel (author); Mundil, Roland (author); Backhouse, John (author)
Publication Date: 2012
Handle Link: https://hdl.handle.net/1959.11/11275
Abstract: Coal exploration coreholes in the Permian of the Fitzroy Trough (Canning Basin, Western Australia) have intersected thin (<15 cm) ash-fall tuffs in seams from the 30-300-m thick Lightjack Formation. Four of these tuffs within the 'Didecitriletes ericianus' spore-pollen zone have yielded high-precision U-Pb zircon CA-IDTIMS ages of 268.63-270.14 Ma, consistent with a Wordian age. The formation is dominated by siltstone and sandstone, with minor coal and fossiliferous beds near the base, and extends along the major depocentre of the basin (Fitzroy Trough - Gregory Sub-basin), and its margins. The unit spans the Roadian-Wordian-Capitanian based on ammonoids ('Daubichites goochi' and 'Bamyaniceras australe'), brachiopods ('Neochonites ('Sommeriella') afanasyevae' zone), and palynomorphs ('Dulhuntyispora granulata' to 'D. parvithola' zones). Rare conodont genera from the formation include 'Vjalovognathus', 'Mesogondolella' and 'Hindeodus'.
Publication Type: Conference Publication
Conference Name: 34th International Geological Congress (IGC): Unearthing our Past and Future - Resourcing Tomorrow, Brisbane, Australia, 5th - 10th August, 2012
Conference Details: 34th International Geological Congress (IGC): Unearthing our Past and Future - Resourcing Tomorrow, Brisbane, Australia, 5th - 10th August, 2012
Source of Publication: Proceedings of the 34th International Geological Congress, p. 3386-3386
Publisher: Australian Geosciences Council
Place of Publication: Brisbane, Australia
Field of Research (FOR): 040311 Stratigraphy (incl Biostratigraphy and Sequence Stratigraphy)
040303 Geochronology
HERDC Category Description: E3 Extract of Scholarly Conference Publication
Other Links: http://trove.nla.gov.au/work/170160251
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