The mid‐Palaeozoic turbiditic Mathinna Group, northeast Tasmania

Linking mainland Australia and Tasmania using ambient seismic noise tomography: Implications for the tectonic evolution of the east Gondwana margin

“…The WTT exhibits widespread outcrop of Neoproterozoic sedimentary and volcanic rocks, although the majority were metamorphosed during the Cambrian (Berry et al, 2007). In contrast, the oldest rocks in the ETT are early Ordovician or younger (Powell et al, 1993), suggesting that these two disparate geologies on either side of the Tamar River could potentially be separated by a crustal-scale discontinuity, the so called Tamar Fracture System (Williams, 1978).…”

“…(Powell and Baillie, 1992;Powell et al, 1993;Seymour, 2011). These rocks are part of a larger succession of turbiditic sandstones and mudstones, the Mathinna Supergroup, which forms the pre-Carboniferous basement of the ETT from the Furneaux Islands to Eaglehawk Neck in southeastern Tasmania (Powell et al, 1993). During the Devonian, prior to and following the Tabberabberan Orogeny, large areas of NE Tasmania were subjected to granitoid intrusions (Black et al, 2005).…”

Plate-driven extension and convergence along the East Gondwana active margin: Late Silurian–Middle Devonian tectonics of the Lachlan Fold Belt, southeastern Australia

“…In northeastern Tasmania, the Lachlan Fold belt is dominated by the turbiditic Mathinna Supergroup of Early Ordovician to Early Devonian age and intruded by the Early to Late Devonian Blue Tier Batholith with associated extrusive equivalents (Powell et al 1993;Black et al 2005). Most authors support continuous deep-marine sedimentation from the Early Ordovician through the Silurian to Early Devonian and have considered that the Mathinna Basin formed with a similar geometry to the Melbourne Trough (Powell et al 1993(Powell et al , 2003.…”

Complex regional fault history of the Badger Head region, northern Tasmania

“…Burrett & Martin 1989;Elliott et al 1991;Powell et al 1991;Elliott & Gray 1992). Three implicit assumptions appear to have hampered the search for a coherent history for the island.…”