The principal targets on the Rovina property are related to the porphyry copper–gold mineral deposit model.

The main mineralized targets on the Rovina property are the Rovina Cu–Au porphyry, Colnic Au–Cu porphyry and the Ciresata Au-Cu porphyry.

The mineralized porphyries at Rovina, Colnic, and Ciresata display moderate to intense potassic hydrothermal altered cores, and strong quartz stockwork veining. The Au–Cu mineralization manifests as stockworks and disseminations, centered on porphyritic, subvolcanic-intrusive complexes of hornblende-plagioclase diorites. These porphyries would classify as gold-rich, especially Ciresata and Colnic, and contain many of the features common in gold-rich porphyries (i.e., dioritic, calc-alkaline stock associated and abundant magnetite alteration) (Sillitoe, 2000). No significant porphyry-related epithermal or skarn mineralization has been identified with only minor occurrences of gold ± silver, lead, and zinc in narrow epithermal veins within the phyllic alteration halo at Colnic.

The Rovina Porphyry covers approximately 350 m (northwest) x 600 m (northeast) in the main area and 300 m (northeast) in the southwest extension in the Baroc Valley. It is currently defined to a maximum vertical depth of about 600 m in the main zone. The majority of drill holes have intersected varying degrees of porphyry-style mineralization, ranging in grade from 0.1 to 1.0 g/t Au and 0.01 to 0.7% Cu over down hole lengths ranging from 10 m to 550 m, with typical intersection lengths of 400 m.

Gold-copper mineralization is associated with pyrite-chalcopyrite-magnetite occurring in veinlet stockworks and as finely disseminated grains. Oxidation is restricted to the uppermost few metres with exception a small area in Baroc Valley at the Rovina. In this area, secondary copper minerals malachite and chrysocolla are observed in the weathering zone and minor occurrences of supergene copper minerals (Chalcocite) occur below the weathering zone.

The Colnic Porphyry, covering approximately 700 m (northwest) x 600 m (northeast) with a maximum defined vertical depth of about 400 m. The porphyry-style mineralization, ranging in grade from 0.3 to 1.3 g/t Au and 0.01 to 0.18% Cu over down hole lengths ranging from 10 m to 350 m, averaging around 140 m.

Gold-copper mineralization is associated with pyrite-chalcopyrite-magnetite occurring in veinlet stockworks and disseminated. Oxidation is restricted to the uppermost few metres of the prospect and no significant oxide cap or supergene enriched horizons have been encountered to date. The mineralization is best developed within K2 and K3 potassic alteration of quartz diorite porphyry, in particular where multidirectional stockwork vein intensity is highest. At Colnic, the gold-copper mineralization contains anomalous zinc ranging from 150 to 600 ppm with an approximate average of 300 ppm. A zone of elevated zinc + gold mineralization has developed predominantly in or proximal to the transitional phyllic alteration zone (TRPH). Grades in this zone range from approximately 0.1 to 3 g/t Au and 300 to 5,000 ppm Zn. In some cases, the contact zone between the phyllic and mineralized potassic zone grades from pyrite to pyrrhotite to magnetite representing a possible sulphidation front. Proximal to, and within Chubby’s fault/fracture zone, zinc mineralization appears to be related to late-stage quartz–carbonate veinlets.

The Ciresata Porphyry is the least advanced and covers approximately 430 m (northwest) x 500 m (northeast) to a maximum defined vertical depth of 450 m below the surface (-100 m RL) with 50 m to 150 m of barren rock on the surface. Porphyry-style mineralization, ranging in grade from 0.1 to 5 g/t Au and 0.01 to 0.6% Cu.

Gold-copper mineralization is associated with magnetite-pyrite-chalcopyrite occurring in veinlet stockworks and as finely disseminated grains. Weathering oxidation is restricted to the uppermost tens of metres and thus does not affect the deeper Au-Cu mineralization.

The RVP contains three economic deposits: Rovina, Colnic, and Ciresata. Pit designs are developed for Rovina and Colnic, with Ciresata currently considered economic only as a bulk underground mining operation.

Open pit mining is accomplished with two 21 m3 electric hydraulic shovels, a 20 m3 front-end loader and on average eight 180 tonne haulage trucks. Ore is hauled directly from the pits to a primary crusher located in the Baroc Valley. Waste dumps are located in the Rovina Valley and in the Baroc Valley. Approximately 25% of the open pit waste will be backfilled into the Colnic pit as a direct haul from mining Rovina's later phases.

A review of the Ciresata deposit indicates that the most effective method to mine the deposit is by a bulk underground mining method. A conceptual design concept is established for Ciresata that has the deposit mined in two phases. The initial shorter life phase targets the upper higher-grade section using a modified vertical crater retreat (VCR). The second phase is an induced block cave for the lower portion of the deposit. The ore material from both of this area will be sent to the mill in the Baroc Valley via a 6 km underground conveyor gallery, which is the access to the second phase.

The process plant described herein is designed to process an average of about 40,000 t/d of ore from the Ciresata, Colnic, and Rovina Deposits. The process includes two stage grinding using semi-autogenous (SAG) and ball milling with pebble crushing to produce a ground product suitable for rougher flotation of copper and gold. After regrinding of the rougher concentrate, three stages of conventional cleaner flotation followed by liquid/solid separation produce a final concentrate of marketable grades.

ROM ore with a particle size of 100% passing 1,500 mm is fed to a 1,372 by 1,905 gyratory crusher. The crushed product discharges into a pocket with a capacity equivalent to two ore haul trucks. A hydraulic rock breaker is installed at the primary crusher facility to break oversize material.

The crushed product is removed from the discharge pocket by a variable speed apron feeder. A dust suppression system installed at the truck dump pocket minimizes the generation of dust during truck unloading. Four variable speed apron feeders extract ore from the stockpile and deliver material to the mill feed conveyor. Two feeders are sufficient to provide 100% of the design feed rate.

The feeders discharge at an average rate of 1,830 t/h onto the SAG mill feed conveyor. Most of the water added at the SAG mill and elsewhere in the process is reclaim water obtained from the tailing pond, with fresh water used only as makeup. The 10,000 x 5,800 SAG mill discharges to a double deck-vibrating screen fitted with screen panels of 37 mm and 15 mm openings. The screen oversize is transported by a series of conveyors to a pebble crusher with the crusher discharge returning to SAG mill feed. Magnets and a metal detector will prevent steel from entering the pebble crusher.

The SAG mill screen undersize product is pumped to two sets of cyclones operating in closed circuit with two 7,920 x 11,600 ball mills. Cyclone overflow flows by gravity to the rougher flotation conditioner at a nominal product size (P80) of 74 µm.

eagents comprising potassium amyl xanthate, sodium isopropyl xanthate, methyl isobutyl carbinol (MIBC), and milk of lime for pH control are employed in the flotation process and added as required throughout the circuit. The cyclone overflow from grinding feeds the rougher flotation circuit. Rougher tailings flow to a scavenger flotation circuit prior to discharge to the tailings impoundment area. The scavenger concentrate reports to flotation feed. Rougher concentrate is directed to the regrind circuit cyclone feed pump box.

Rougher concentrate is reground in a tower mill in closed circuit with cyclones. Cyclone overflow is directed to first stage cleaner flotation.

Tailings from first cleaner flotation are scavenged for copper and gold prior to discharge to the tailings impoundment area. Scavenger concentrate reports to the regrind circuit pumpbox. First cleaner concentrate is cleaned in two additional cleaner flotation stages with tailings from each stage moved counter currently to the advancing concentrate.

Final flotation concentrate reports to a thickener and subsequently to a pressure filter for water removal to approximately 6% moisture. Filtered concentrate is stored in tote bags in an enclosed area, and loaded into standard shipping containers then hauled with trucks for shipment.