Abstract

The latest surace wave tomographic models of Australia are presented. These models incorporate new data, particularly useful in the western half of the continent, containing the majority of the oldest Archaean cratons. A variety of improved techniques have been developed to improve the reliabilty of the tomographic images. Multiple starting models are used within the waveform inversion procedure, giving improved path coverage, and a better estimate on the uncertainty of the 1D path averaged model. A multi-scale tomographic method is illustrated, thus damping the final images towards large scale features in the data, rather than the initial, homogenous, a priori reference model. The qualititative relationship between the tomographic images and known geology and tectonics is discussed, with focus on the shallow structure of the eastern margin of Australia, and also the variations in structure of the shield region.