Detrital zircon ages, provenance and tectonic evolution in the early Paleozoic of Tasmania and Waratah Bay, Victoria

The provenance of the upper Cambrian to Upper Ordovician sedimentary rocks Tasmania and Waratah Bay in southern Victoria provides information about complex dynamic tectonic environment present during their deposition. This paper uses U–Pb detrital zircon data constrain stratigraphic comparisons reconstructions these rock sequences. Multivariate statistics are used investigate similarity between ages quantify disparity among different samples from various locations. In western central Tasmania, Tyennan region supplied most zircons late Early Ordovician. overlying Middle Pioneer Sandstone records a switch with derived Mount Read Volcanics (MRV) mixed similar those continental-derived Paleozoic deposited throughout east Gondwana. Gordon Group lacks younger than 1.2 Ga, which indicates return local Precambrian rocks.In MRV Gondwana-like sources occurred earlier within Deadmans Formation, is dominated by Gondwana age signature. East Terrane, Lefroy have populations Neoproterozoic earliest Lachlan Orogen. Victoria, Bear Gully Chert exhibit both distal sources. switching west Tasmanian sequences implies docking mainland Australia Orogeny. arrival into basins at times areas, reflecting topography paleogeography. Key PointsPaleozoic multisource signatures that change over time, implying activity deposition.Paleozoic northeastern show Gondwana-wide Orogen.The shows populations.The signature suggests VanDieland docked Australian continent