New progress of geology and mineral resources mapping in Oceania

This paper mainly deals with new progresses that have been made in the map compilation of Oceania. The research party has compiled The Geological Map of Oceania region (1:2500000) and The Metallic Mineral Map of Oceania (1:2500000). In the manual of the map, the authors re-divided the original three primary tectonic units of Oceania into four primary tectonic units, highlighted the importance of Mesozoic tectonic units in the Papua New Guinea-New Zealand orogenic system, and separated them from the Cenozoic tectonic unit of southwest Pacific island arc. The four primary tectonic units were redefined into 12 secondary tectonic units and 42 third-level units, and the corresponding stratigraphic column graphs and intrusive sequence diagrams were prepared. The tectonic evolution of Oceania was described in this paper. According to the metallogenic characteristics of corresponding mineralization belts, the Oceania region was divided into 4 metallogenic domains, i.e., the central-western Australia continental Precambrian cratonic metallogenic domain, the eastern Australia Paleozoic orogenic metallogenic domain, the Papua New Guinea-New Zealand Mesozoic island arc metallogenic domain and the southwestern Pacific Cenozoic archipelagic arc-basin system metallogenic domain. This paper also summarized the geological and mineral resource characteristics of each metallogenic belt.