Papua New Guinea is a well-known late Miocene-Pliocene Au-Cu province at the leading edge of the Australian Plate. The deposits occur as intrusive and sub-volcanic, commonly alkaline, porphyry systems with attendant structurally controlled epithermal Au reefs and, in appropriate rocks, skarn deposits. Most exploration and discovery has been focused in the within arc region (Figure 1) of the PNG Highlands region between Frieda River (west) and Wafi-Wau-Bulolo (east); note than Manus Island (Mt Kren; 10Ma) and New Britain have also shown strong prospectivity.Although the rich Tolukuma mineral district of Central Province had been fully identified by 1989 (mining began at Tolukuma in 1993), other than at Mt Kodu limited attention has been given to Central Province and the Papuan Peninsula, dominated as they are by the Cretaceous Owen Stanley Metamorphics (OSM) which are overthrust by the broad and extensive Papuan Ultramafic Belt (PUB) (Figure 2). CITATION: Findlay, R H, 2019. Liamu Igneous Complex, PNG: significance for late Miocene-Pliocene mineralisation along Papuan Peninsula and PNG tectonics, in Proceedings PACRIM 2019, pp 322325 (The Australasian Institute of Mining and Metallurgy: Melbourne).