Publication Name: The Sedimentary Basins of WA
Authors: G.D. Borel & G.M. Stampfli
Publication Volume: 3
Date Published: December 2002
Number of Pages: 27
Reference Type: Book Section
Abstract:
The Phanerowic motion of the Australian plate was compared with the geohistory of the North West Shelf of Australia, combining stratigraphic, sedimentary and palaeontological data from 42 wells drilled offshore and onshore along the North West Shelf. This analysis shows stepwise tectonic subsidence curves reflecting a succession of rifting events and uplifts, and allows tectonic and thermal subsidence events to be distinguished.The latitudinal plate motion was derived from global palaeo-plate reconstructions integrating plate tectonic
constraints such as ocean spreading rates, plate buoyancy, and dynamic plate boundaries. Latitudinal motion,
velocity and rotation of the Australian plate were calculated using virtual palaeo-poles derived from these
reconstructions.
The Late Devonian extensional faulting event can be correlated with a rapid southward drift of the Australian plate. The Late Carboniferous-Early Permian opening of Neo-Tethys corresponds to the shift in drift direction from south to north. The Triassic Fitzroy movement is linked with the closures of Palaeo-Tethys and the evolution of the Bowen Basin. Jurassic rifting of the Argo Abyssal Plain is probably a consequence of a rotation of the plate.