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eastern Mentelle Basin

Entity ID: 523494 Compiled by: Payne, D. and Borissova, I. Year: 2010 Status: Defined

Last Revised: 2013

Rank: subprovince Type: sedimentary Subtype: polyhistory Location: WA Off-shore

Synonyms: NA Symbol: NA

Minimum age: Recent Age method: inferred, biostratigraphic correlation

Maximum age: Early Permian Age method: inferred, seismic interpretation

Summary: The eastern Mentelle Basin is the shallower part of the Mentelle Basin comprising lower Permian to Mid-Jurassic interlinked depocentres some of which contain up to 9 km of sediments.

Attributes:
Area (square kilometres): 10300
State: WA
Minimum present water depth (m): 500
Maximum present water depth (m): 3800
85% is at 500-2500 m water depth
Main rock types: carbonate sediments and sedimentary rocks
Cenomanian-Recent
Main rock types: siliciclastic sediments and sedimentary rocks
Permian-Albian
Main depositional environment: marine and non-marine
Maximum sediment thickness (m): 8000
approx; generally less than 6000 m thick
Country: AUS

Parent: Mentelle Basin

Child Provinces: No data

Relationships:
Adjoins - Yallingup Shelf, western Mentelle Basin

Constituent units:

Events: Australia-Greater India Breakup, Australia-Antarctica break-up

Mineral Deposits: No data

Key Reference: Borissova, I., Bradshaw, B.E., Nicholson, C.J., Struckmeyer, H.I.M., Payne, D.S. 2010, New exploration opportunities on the southwest Australian margin - deep-water frontier Mentelle Basin, APPEA Journal, 50, 1-13 (Refid:65820)

Comments: First Acreage Release in 2010

Overview: The eastern Mentelle Basin extends across the continental slope in water depths of 500 to 2000 m. It contains five individual depocentres: Baranup, Alexandra, Quindalup, Augusta and Manjimup. It consists of a series of tilted fault blocks that are bounded by east-dipping faults which predominantly strike NNW to NNE. The eastern Mentelle Basin contains inferred Lower Permian and Triassic to Mid-Jurassic syn-rift and thermal subsidence succession. The age control is provided by a seismic tie to two dredges in the Perth Canyon. The pre-breakup succession is likely to contain lower Permian glacio-marine, fluvial, lacustrine and deltaic sediments equivalent to the Mosswood Formation, Woodynook Sandstone and Rosabrook and Redgate coal measures, Triassic Sabina and Lesueur sandstone and lower Jurassic Cattamarra Coal Measures. These units were extensively deformed, faulted and eroded at the onset of Middle Jurassic rifting. The Middle Jurassic to Early Cretaceous succession is largely absent over the eastern Mentelle Basin. Probable source rocks include Permian and lower Jurassic coals and carbonaceous shales. Potentially good reservoirs may exist in fluvial sediments within the pre-breakup succession and also in marine sandstones within the post-breakup succession. The majority of seals within the pre-breakup succession are probably intraformational. Petroleum systems modelling suggests that generation and expulsion probably occurred from the Early to Middle Jurassic onwards. Play types in the eastern Mentelle Basin include: Permian to Early Jurassic faulted anticlines, fault blocks and subunconformity plays as well as stratigraphic pinchout and onlap plays.

Images: Regional setting of Mentelle Basin (980 KB), Structural elements Mentelle Basin (558 KB), Stratigraphic chart Mentelle Basin (503 KB), Cross section Mentelle Basin (412 KB), Conceptual play diagram Mentelle Basin (449 KB), Maturity zones Mentelle Basin (517 KB), Cross section Mentelle Basin (412 KB)

Other media: No data

Source Information: No data

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This report was generated on Thursday, October 23, 2014 10:47:03 PM EST.