The most intense stockwork veining and alteration, and the highest Au and Cu grades occur immediately adjacent to the monzonite porphyry. The best part of the orebody occurs above the porphyry and the weaker parts along the sides. The intensity of veining and alteration declines both outwards and inwards from the monzonite porphyry margin. This results in a small low-grade central portion in the monzonite porphyry. Ore minerals are native gold, chalcopyrite and bornite, mostly occurring within veins, but also disseminated.
Magnetite is a major accessory mineral in veins.
Structures cutting the mineralisation had significant Figure 2. However there was little syn or post-mineral movement, since the mineralisation has no major offsets. Strong alteration and anomalous metal values related to the deposit do not extend upwards for sufficient distance to be detectable at or for a considerable distance below the palaeo-surface. Early Exploration Modern era exploration at the site was prompted by its proximity to the mineralised Cadia district, and particularly by the recognition of magnetic features, which can easily be interpreted as westward extensions or repetitions of the magnetic anomaly over the magnetic skarn at Big Cadia. In 1985 Homestake Australia drilled two RC percussion holes to downhole depths of 95m to test magnetic targets, with very poor results.