Regional volcanism of northern Zealandia: post-Gondwana break-up magmatism on an extended, submerged continent MortimerN. GansP. B. MeffreS. MartinC.E. SetonM. WilliamsS. E. TurnbullR. QuiltyP. G. MicklethwaiteS. TimmC. SutherlandR. BacheF. CollotJ. MaurizotP. RouillardP. RolletN. 2017 U-Th-Pb LAICPMS analyses.