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Perth Basin

Entity ID: 22020 Compiled by: Bradshaw, B.E. Year: 2002 Status: Defined

Last Revised: 2013

Rank: province Type: sedimentary Subtype: polyhistory Location: WA On-shore and off-shore

Synonyms: NA Symbol: NA

Minimum age: Recent Age method: inferred, biostratigraphic correlation

Maximum age: Early Permian Age method: inferred, biostratigraphic correlation

Summary: The Permian to Recent Perth Basin is a large, onshore and offshore immature to frontier petroleum basin on the southwest Australian passive margin, containing about 15km of predominantly siliciclastic marine and nonmarine sedimentary rocks.

Attributes:
Area (square kilometres): 172000
State: WA
Minimum present water depth (m): 0
large part of basin is onshore
Maximum present water depth (m): 4500
Main rock types: siliciclastic sediments and sedimentary rocks
some coals and carbonates are also present
Main depositional environment: marine and non-marine
Maximum sediment thickness (m): 15000
Resources: Oil
Resources: Coal - undifferentiated
Resources: Gas
Country: AUS

Parent: No data

Child Provinces: Vasse Shelf, Zeewyck Sub-basin, Abrolhos Sub-basin, Vlaming Sub-basin, Houtman Sub-basin, Turtle Dove Ridge

Relationships:
Adjoins - Eucla Basin, Gascoyne Sub-basin, Southern Carnarvon Basin, Yallingup Shelf

Constituent units: Ascot Formation, Beckett Member, Birdrong Sandstone, Bookara Sandstone Member, Breton Marl, Bringo Shale, Cadda Formation, Cardabia Calcarenite, Carynginia Formation, Cattamarra Coal Measures, Cooloongup Sand, Coolyena Group, Dandaragan Sandstone, Dongara Sandstone, Gage Sandstone, Gearle Siltstone, Gingin Chalk, Greenough Sandstone, High Cliff Sandstone, Holmwood Shale, Jandakot Member, Kings Park Formation, Kockatea Shale, Korojon Calcarenite, Leederville Formation, Mardie Greensand Member, Miria Formation, Muderong Shale, Nangetty Formation, Noondine Chert, Osborne Formation, Otorowiri Siltstone (now upgraded to Otorowiri Formation), Poison Hill Greensand, Sabina Sandstone, Sharks Formation, South Perth Shale, Spearwood Sands, Tamala Limestone, Toolonga Calcilutite, Trealla Limestone, Tumblagooda Sandstone, Warnbro Group, Windalia Radiolarite, Winning Group, Wittecarra Sandstone, Yarragadee Formation, Amberley, Arranoo Member, Bouvard Reefs, Cullacabardee Sand Member, Kardinya Shale Member, Mariginiup Member, Pinjar Member, Wanneroo Member, Challenger Formation, Haycock Marl, Parmelia Formation (now upgraded to Parmelia Group), Porpoise Bay Formation, Wadjemup Formation, Carnac Member (now upgraded to Carnac Formation), Kwinana Group, Lancelin Formation, Bassendean Sand, Cockleshell Gully Formation, Kojarena Sandstone, Lesueur Sandstone, Molecap Greensand, Wagina Sandstone, Woodada Formation, Leschenault Formation, Stockton Group, Irwin River Coal Measures, Eaton Sand, Colalura Sandstone, Becher Sand, Eneabba Formation, Bellevue Limestone Member, Clifton Downs Member, Beekeeper Formation, Straggler Member, Charlotte Sandstone, Mangles Member, Hawley Member, Jervoise Sandstone, Wagina Formation, Sue Group, Mosswood Formation, Willespie Formation, Ashbrook Sandstone, Redgate Coal Measures, Rosabrook Coal Measures, Woodynook Sandstone, Parmelia Group, Carnac Formation, Otorowiri Formation, Stragglers Member, Wonnerup Member, Bassendean Dune System, Muderup Beach Rock, Perth Formation, Quindalup Dunes, Preston Beach Coquina, Springhill Limestone Member, Cullens Diamictite"", Mirrabooka Member, Yalgorup Member

Events: No data

Mineral Deposits: Waroona Shoreline, Bookara, Yoganup Group/Iluka, Scott River, Eneabba area (Iluka Mid West), Talisker, Vasse River, Jangardup, Hill River, Beenup, Cooljarloo (TRONOX), Treeton, Eneabba, Capel, Green Head, Minninup Shoreline, Irwin River, Sargon, Eradu, Irwin River

Key Reference: Mory, A.J., Iasky, R.P. 1996, Stratigraphy and structure of the onshore northern Perth Basin Western Australia, Geological Survey of Western Australia. Report, 46, 102pp (Refid:23279)

Comments: No data

Overview: The Early Permian to Recent Perth Basin is a north-south trending, onshore and offshore basin extending about 1300 km along the southwestern margin of the continent and covers about 172,000 sq. km. The basin is bounded to the east by the Darling Fault and extends west to the edge of continental crust. The onshore portion is extensively explored, with 216 wells drilled (Oct 2002); it produces gas and minor oil in the north. The offshore portion is underexplored with only 27 wells and a recent commercial oil discovery at Cliff Head (Oct 2002). The basin has a maximum sediment thickness of 15,000 m with several major depocentres. These include the mostly onshore Dandaragan Trough, Bunbury Trough, Coolcalalaya Sub-basin, and offshore Vlaming Sub-basin, Houtman Sub-basin, Abrolhos Sub-basin and Zeewyck Sub-basin. Initial rifting established a series of Permian to Early Triassic depocentres for fluvial and marine siliciclastics with minor carbonates and coals in the north, while in the south fluvial siliciclastics and coals dominated. These Permian and Lower Triassic rift-sag deposits are associated with the major petroleum system in the Perth Basin. A second phase of rifting in the Late Triassic and Early Jurassic was associated with widespread fluvial and deltaic deposits, including a thick succession of siliciclastics and coals, that are overlain by Middle Jurassic marine shales in the north. These Lower to Middle Jurassic strata form another important petroleum system in the Perth Basin. Major rifting occurred in the Middle Jurassic to earliest Cretaceous, followed by a period of uplift and erosion associated with break-up. This final rift and break-up phase was associated with deposition of fluvial and marine siliciclastics that are associated with the main petroleum system in the Vlaming Sub-basin. Late Cretaceous and Tertiary sedimentation has occurred under stable passive margin conditions and produced a thin cover of marine carbonates. Petroleum traps include tilted fault blocks, anticlines, compressional rollovers and structural/stratigraphic traps.

Images: Perth Basin regional cross-section Profile 1 (53 KB), Perth Basin regional setting and cross-section location map (101 KB), Perth Basin regional cross-section Profile 2 (42 KB), Perth Basin regional cross-section Profile 3 (56 KB), Perth Basin regional cross-section Profile 4 (65 KB), Perth Basin regional cross-section Profile 5 (63 KB), Perth Basin regional cross-section Profile 6 (58 KB), Perth Basin regional cross-section Profile 7 (48 KB), Perth Basin regional cross-section Profile 8 (45 KB), Northern Perth Basin stratigraphy (80 KB), Southern Perth Basin stratigraphy (78 KB)

Other media: No data

Source Information:

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This report was generated on Tuesday, September 23, 2014 8:18:51 AM EST.