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|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)
|HERDC Category Description:||E3 Extract of Scholarly Conference Publication||Other Links:||http://trove.nla.gov.au/work/170160251||Statistics to Oct 2018:||Visitors: 765
|Appears in Collections:||Conference Publication|
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