The northern two thirds of Romang Island is interpreted to be a volcanic centre similar to the Lakuwahi Project area in the south, but approximately two and a half times larger. It is older and more highly eroded than Lakuwahi; this erosion would work to bring any porphyry system relatively closer to the surface and this is evidenced by the outcropping of altered and mineralised quartz diorites along the north coast and within the exploration grid.

Processing of detailed aeromagnetics has indicated multiple mineral targets marked by distinct magnetic lows, interpreted to represent areas of mineralising hydrothermal activity which are magnetite destructive.