Deciphering the crustal structure of the Tasmanides in southeastern Australia with anisotropic short period Rayleigh wave tomography

The Tasmanides of Australia were formed by a series of tectonic supercycles that determined the crustal-and probably the lithospheric-structure of the eastern third of the Australian continent during the Phanerozoic. In southeast Australia, the Tasmanides essentially consist of the Delamerian, Lachlan and New England orogens whose mutual boundaries are obscured by the presence of large Mesozoic to Cenozoic sedimentary basins: the Sydney Basin at the boundary separating the Lachlan and the New England orogens, and the Murray Basin at the boundary between the Delamerian and the Lachlan orogens. In this work, we exploit the ambient noise wavefield recorded by the largest transportable seismic array experiment in the southern hemisphere, which has operated in eastern Australia from 1998 to present and involves the deployment of over 700 temporary stations with an average interstation distance of …