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The Perth Basin is a thick, elongated sedimentary basin in Western Australia. It lies beneath the Swan Coastal Plain west of the Darling Scarp, representing the western limit of the much older Yilgarn Craton, and extends further west offshore. Cities and towns including Perth, Busselton, Bunbury, Mandurah and Geraldton are built over the Perth ...
The Yilgarn Craton appears to have been assembled between ~2.94 and 2.63 Ga by the accretion of a multitude of formerly present blocks or terranes of existing continental crust, most of which formed between 3.2 Ga and 2.8 Ga.
Rifting of Australia from India and Africa began in the Permian, resulting in the production of a rift basin and half-grabens of the basal portions of the long-lived Perth Basin. Petroleum was formed in the Swan Coastal Plain and Pilbara during this rifting, presumably in a rift valley lake where the bottom was deoxygenated (akin to Africa's ...
The Diamantina fracture zone was first detected by RV Vema and RV Argo in 1960. It is named after HMAS Diamantina (K377), which conducted further exploration in 1961.. Professor Alan Jamieson from The University of Western Australia led a scientific expedition to the eastern margin of the DFZ, which enters the southwest corner of the Australian exclusive economic zo
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They are deposited unconformably over the Western Zone, overlapping with the deposition of the Kimberley Group. The depositional periods of the sediments, determined from rocks near the bottom of the basin, indicate that the Speewah Basin formed around 1835 Ma, at the same time as the granitic and gabbroic intrusions. [18] [14] [2]
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