The Anocarire mineral concessions cover the eroded core of a collapsed strato-volcano. The core of the volcano hosts a microdiorite intrusion within a broad zone of advanced argillic altered and silicified rocks. The hydrothermally altered rocks extend over an area measuring 4 km by 2.5 km with the advanced argillic zone occurring in a more restricted area immediately peripheral to the core intrusion. The breccias observed in the most strongly altered area are thought to represent super-heated phreatic breccias and typically comprise alunite-kaolinite-quartz.

The precious metals content of the rocks at surface in the altered zone are low, with values up to 0.4 g/t Au. However, it is considered that the exposed alteration zone may represent the top of a magmatic hydrothermal - phreatic breccia system in which gold mineralization may have been deposited at depth.