The 1800–1100 Ma tectonic evolution of Australia

摘要: Abstract This paper presents a plate tectonic model for the evolution of Australian continent between ca. 1800 and 1100 Ma. Between 1600 Ma episodic orogenesis occurred along southern margin above north-dipping subduction system. During this interval multiple orogenic events occurred. The West Craton collided with North (ca. 1790–1770 Ma), Archaean nucleus Gawler amalgamated 1740–1690 Ma), numerous smaller terranes accreted western Arunta Inlier 1690–1640 Ma). pattern accretion suggests southward migration margin, which due to combination slab rollback back stepping system behind continental blocks. Coeval series back-arc basins formed in interior parts South Craton, were attached prior 1500 Ma. Extension led opening an oceanic basin eastern at 1660 Ma. Continuing divergence was accommodated by spreading whereas thermally subsided resulting development sag-phase throughout Craton. subsequently consumed during convergence, ultimately 1600–1500 Ma belt Proterozoic Australia. 1470 1100 Ma, consisting Curnamona Province rifted from re-attached its present configuration 1330–1100 Ma orogenesis, is preserved Albany-Fraser Belt Musgrave Block.