This project involved using high-resolution geochronology (ID-TIMS on zircon and Re-Os on molybdenite) to constrain the magmatic and mineralising events at the largest known alkalic epithermal Au deposit (Lihir, Papua New Guinea) and a calc-alkalic porphyry district (Namosi, Fiji). Results from this project will help us better understand the volcano-magmatic construction of a porphyry district, from early volcanism, through emplacement of porphyry-related intrusions and then superimposition of a world-class epithermal Au deposit. All analytical work is complete (geochronology and Hf isotopes) and is currently being incorporated into two manuscripts to be submitted in early 2020.