western Mentelle Basin
Entity ID: 523495 Compiled by: Payne, D. and Borissova, I. Year: 2010 Status: Defined
Last Revised: 2013
Rank: Subprovince Type: sedimentary Subtype: polyhistory Location: Off-shore
Synonyms: NA Symbol: NA
Minimum age: Recent Age method: inferred, biostratigraphic correlation
Maximum age: Middle Jurassic Age method: inferred, seismic interpretation
Summary: The ultra-deep water western Mentelle Basin contains Mid-Jurassic to early Cretaceous syn-rift and early Cretaceous to Holocene post-rift successions separated by a thick Valanginian to Hauterivian syn-breakup igneous complex.
Attributes:
Area (square kilometres): 24800 Minimum present water depth (m): 1300 Maximum present water depth (m): 4000 Main rock types: carbonate sediments and sedimentary rocks Cenomanian-Recent Main rock types: siliciclastic sediments and sedimentary rocks Permian-Albian Main rock types: igneous - intrusive Main depositional environment: marine and non-marine Maximum sediment thickness (m): 11000 approx. Present crustal setting: continental Country: AUS
Parent: Mentelle Basin
Child Provinces: No data
Relationships:
Adjoins - Naturaliste Plateau, eastern 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 western Mentelle Basin is an ultra-deep water part of the Mentelle Basin containing up to 11 km of sedimentary fill. The two major depocentres of the western Mentelle Basin, Eagle and Rosa, were formed during Mid-Jurassic to Early Cretaceous rifting. Half graben within the western Mentelle Basin are bounded by easterly dipping faults in the Eagle depocentre and southeasterly dipping faults in the Rosa depocentre. Paleocene to Eocene margin collapse associated with the onset of the fast spreading in the Southern Ocean resulted in fault reactivation and inversion. The stratigraphy of the western Mentelle Basin is inferred from seismic ties to DSDP 258, which provides high resolution data on Mid-Albian to Holocene part of the section, and comparisons to the adjacent Vlaming Sub-basin. Petroleum prospectivity assessment based on well data from the Perth Basin suggests that potential source rocks include Middle Jurassic to early Cretaceous coals and carbonaceous shales. Good quality reservoir rocks are likely to be present at multiple stratigraphic levels. Regional seals are likely to be associated with breakup-related volcanics and Albian marine mudstones. Petroleum systems modelling suggests that only Jurassic rocks have reached the oil window. Generation and expulsion from these source rocks probably occurred from the Early Cretaceous onwards. Play types in the western Mentelle Basin include syn-rift high-side fault block traps, sub-basalt anticlines and fault blocks, post-rift anticlines and a range of stratigraphic traps.
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), Cross section western Mentelle Basin (426 KB), Conceptual play diagram Mentelle Basin (449 KB), Maturity zones Mentelle Basin (517 KB)
Other media: No data
Source Information: No data
