The Rosevale Porphyry Corridor (RPC) has the potential to host a large buried porphyry copper - gold - molybdenum mineralised system. This prospect was discovered by Diatreme in 2008 and work has included deep diamond core drilling which has assisted in identifying porphyry related copper/molybdenum and breccia hosted silver/lead/zinc/gold mineralisation.
Recent exploration over Clermont has resulted in an improved understanding of the geology and mineralisation of the Rosevale Porphyry Corridor. This work has highlighted drill-ready porphyry copper targets. At the Gollan Prospect toward the northern end of the Rosevale Porphyry Corridor, Diatreme has defined from drilling a wide zone of haematite-bearing propylitic alteration of the intrusives, located in a zone of abundant secondary carbonate copper on surface. The geological setting is reminiscent of the high grade Ridgeway deposit at Cadia NSW.
Exploration in 2012 resulted in the discovery of the Savannah Prospect to the southeast of the Rosevale Porphyry Corridor. Mapping and rock chip results from Savannah have return significant results of up to 25ppm gold, 80ppm silver, 1.8% copper, 1.4% lead, and 1.4% zinc over a strike length of 1.4km.
A number of structural trends are known within the tenement area and the Anakie Inlier generally, but the most significant of these are the faults and shear zones that have associated silicification with gold mineralisation. Gold mineralisation in the Clermont area occurs in a number of geological environments. Quartz reefs in the Anakie Metamorphics sequence are known to contain gold mineralisation and deposits of this type accounted for some historical gold production.
Most of the past exploration on the known gold bearing quartz vein systems within the Anakie Metamorphics has shown these to be small. These veins are the likely source of at least some of the alluvial gold deposits in the Clermont area. However the amount of alluvial gold at Clermont is not in accordance with the known gold bearing quartz vein and shear occurrences.
This is the case immediately south of Clermont where there is no significant known source for the amount of gold that was mined from the rich Wild Cat lead and other leads in this area. This suggests that, either there are undiscovered gold bearing quartz veins in this area, or another hard rock source exists for the gold. It is the potential for an alternative hard rock source for the gold found in some of these alluvial deposits near Clermont that has driven gold exploration in the district.