Assembly and breakup of the Nuna supercontinent: Geodynamic constraints from 1800 to 1600 Ma sedimentary basins and basaltic magmatism in northern Australia

•Proterozoic Australian crustal elements preserved in western Laurentia.•Late Paleoproterozoic basaltic magmatism in northern Australia linked to continental rifting and breakup.•No physical connection between Australia and Laurentia from 1800 to 1650 Ma.•Arc-like signature in north Australian basalts attributed to crustal contamination during flat-slab subduction.•Magmatism driven by back-arc basin extension and subduction rollback.