The northern two thirds of Romang Island is interpreted to be a volcanic centre similar to the Lakuwahi volcanic centre in the south, but approximately two to two and a half times larger. It also appears older and more highly eroded than Lakuwahi.

Exploration by Robust geologists has revealed strong evidence for the existence of at least one gold rich multi-commodity porphyry system. The system was identified by the coincidence of a magnetic low (hydrothermal destruction of magnetite) with a large potassium (K) radiometric anomaly. Both anomalies were also coincident with a distinct natural vegetation anomaly. (See figure 1.)

Recent processing of detailed aeromagnetics has indicated multiple mineral targets, marked by distinct magnetic lows, interpreted to represent areas of mineralising hydrothermal activity. (See figure 2.)

The coastal expression of the anomalies is marked by extensive hydrothermal alteration with quartz / sulphide stockworking over a continuous outcrop of approximately two kilometres. Channel and grab samples along this outcrop returned values up to 12.3g/t gold, 6.1% copper, 6.86% lead, 15.8% zinc and 142 g/t silver.

Peripheral to the porphyry are numerous high grade base metal veins, notably at the Kiahar prospect, where values of 56.8%, 54.7%, 42.1% and 26.3% lead were returned from outcrops and float material. Associated silver values are 461ppm, 658ppm, 115ppm and 178ppm respectively. Gold is also common at Kiahar with samples of up to 11.5 g/t having been returned.

The porphyry discovery near Dedern Bay in the North Romang Project marks the acceleration and extension of exploration by Robust on Romang Island.