Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/4378
Title: The Permian-Triassic Boundary in Western Australia: evidence from the Bonaparte and Northern Perth basins - exploration implications
Contributor(s): Gorter, JD (author); Nicoll, RS (author); Metcalfe, Ian (author); Willink, RJ (author); Ferdinando, D (author)
Publication Date: 2009
Handle Link: https://hdl.handle.net/1959.11/4378
Abstract: Several sedimentary basins in west Australia contain petroleum reservoirs of Late Permian or older age that are overlain by thick shaly sequences (400–2,000 m) that have been assigned an Early Triassic age. The age of the base of the Triassic shales has been, and continues to be, contentious with strata being variously ascribed to the latest Permian (Changhsingian Stage) or wholly within the earliest Triassic (Induan Stage). In the Perth Basin the Permian‑Triassic boundary appears to be located somewhere in the Hovea Member of the Kockatea Shale. In the Bonaparte Basin, the boundary would appear to be either in the uppermost Penguin Formation or at the boundary between the Penguin and Mairmull formations. The uncertainty of the boundary placement relates to the interpretation of the sedimentological, biostratigraphic and geochemical record in individual sections and basins. Major problems relate to the recognition, or even the presence of unconformities, complications related to the presence of reworked sediments and paleontological material (both conodonts and spore-pollen) and to the significance of geochemical shifts. The age of the basal Kockatea Shale (northern Perth Basin) and the basal Mt Goodwin Sub-group (Bonaparte Basin) is reassessed using palaeontological data, augmented by carbon isotopic measurements and geochemical analyses, supported by wireline log correlations and seismic profiles. The stratigraphy of the latest Permian to Early Triassic succession in the Bonaparte Basin is also revised, as is the nomenclature for the Early Triassic Arranoo Member of the Kockatea Shale in the northern Perth Basin. The Mt Goodwin Sub-group (new rank) is composed of the latest Permian Penguin Formation overlain by the Early Triassic Mairmull, Ascalon and Fishburn formations (all new).
Publication Type: Journal Article
Source of Publication: Australian Petroleum Production and Exploration Association (APPEA) Journal, v.49, p. 311-336
Publisher: Australian Petroleum Production and Exploration Association (APPEA)
Place of Publication: Canberra, Australia
ISSN: 1326-4966
Field of Research (FOR): 040311 Stratigraphy (incl Biostratigraphy and Sequence Stratigraphy)
040301 Basin Analysis
040309 Petroleum and Coal Geology
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
Other Links: http://www.appea.com.au/index.php?option=com_content&task=blogcategory&id=153&Itemid=185
Statistics to Oct 2018: Visitors: 509
Views: 521
Downloads: 0
Appears in Collections:Journal Article

Files in This Item:
2 files
File Description SizeFormat 
Show full item record

Page view(s)

52
checked on Mar 2, 2019
Google Media

Google ScholarTM

Check

SCOPUSTM   
Citations

 

WEB OF SCIENCETM
Citations

 

Items in Research UNE are protected by copyright, with all rights reserved, unless otherwise indicated.