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dc.contributor.authorJafary Dargahi, H.
dc.contributor.authorRezaee, M. Reza
dc.identifier.citationJafary Dargahi, Hanieh and Rezaee, M. Reza. 2013. Lithofacies and Sequence stratigraphic Framework of the Kockatea Shale, Dandaragan Trough, Perth Basin. APPEA Journal. 53: pp. 1-8.

Initial studies affirm large-scale shale-gas potential for the Permo-Triassic intervals of the Perth Basin. The Dandaragan Trough, as a major depocentre in the basin and with the highest number of wells intersecting these intervals, has possibly the greatest shale-gas potential in the area. The primary self-contained shale-gas system proposed for the Dandaragan Trough is in the basal Kockatea Shale (Hovea Member), which was deposited during the Late Permian-Early Triassic. Seven lithofacies have been identified in a continuous 35 m core from the Hovea Member of the Kockatea Shale at Redback–2. Among recognised lithofacies, besides siliceous mudstone, which contains clastic particles, most are representative of deposition in a shallow marine environment with different energy levels. Bioturbated lithofacies reveal deposition in a higher-energy environment compared with the other lithofacies. The sequence stratigraphic framework of the Hovea Member is established based on diagnosis of the lithofacies, cyclical stacking patterns, transgressive surfaces of erosion (TSE), and condensed sections (CSs). The framework supports deposition mainly in an aqueous environment with rare regressions. Periodic tectonic activity can be revealed in high-frequency relative sea-level changes during Hovea Member deposition. Gamma ray (GR) log analysis indicates that the highest GR peak is related to black-shale lithofacies with 1.75% TOC content. The greatest amounts of TOC, however, exist in the fossiliferous mudstone and pyritic mudstone lithofacies. A north–south GR correlation of the Hovea Member shows nearly the same lithological distribution throughout the trough despite its thinning in various areas.

dc.publisherAustralian Petroleum Production and Exploration Association
dc.subjectscanning electron microscopy (SEM)
dc.subjectshale gas
dc.subjecttransgressive surface of erosion
dc.subjectfossiliferous mudstone
dc.subjectKockatea Shale
dc.subjectgamma-ray patterns
dc.subjectblack shale
dc.subjectstrata stacking patterns
dc.subjectpyritic mudstone
dc.subjecttransgression event (TR)
dc.subjectEarly Triassic interval
dc.subjectdepositional environment
dc.subjectstratigraphic framework
dc.subjectsequence boundary
dc.subjectcalcareous mudstone
dc.subjectrelative sea-level changes
dc.subjectDandaragan Trough
dc.subjectcore sample
dc.subjecttotal organic carbon (TOC)
dc.subjectthin-section petrography
dc.subjectHovea Member
dc.subjectsiliceous mudstone
dc.subjectsiliceous calcareous mudstone
dc.subjectlithological variation
dc.subjectbioturbated mudstone
dc.subjectcondensed section
dc.subjectgamma-ray parasequences
dc.subjectregression event (RE)
dc.titleLithofacies and Sequence stratigraphic Framework of the Kockatea Shale, Dandaragan Trough, Perth Basin
dc.typeJournal Article
dcterms.source.titleAPPEA Journal
curtin.accessStatusOpen access

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