The La Libertad vein system (including Mojon, Jabali, Jabali Antenna, San Juan and Los Angeles) is classified as a low-sulfidation epithermal quartz adularia vein system.

The Mojon trend forms a braided stockwork system trending 063° and dipping sub-vertically 75-90° to the SSE. Stockwork/vein zones average 22m wide, with a range from 5-40m. Numerous hanging wall splays are present that are generally narrower and less continuous than the main zone. They are oriented 075°, and have vertical to slightly NNW dips. Au grades in the stockwork zones are generally 0.1 -0.5 g/t Au with occasional spikey values.

Massive veins/vein breccias within the stockwork envelopes have an average true width of about 9m with a range of 1 -20m. Higher gold grades are associated with vuggy, drusy and banded quartz veins. Pyrite (and its oxidized products) is closely related to gold mineralization but is present in small volumes, generally less than 1%.

Surface saprolite alteration is developed to a depth of approximately 15-20m.

The San Juan zone is a low sulfidation epithermal vein and stockwork system hosted by sub-horizontal andesitic volcanic and volcaniclastic rocks.

The San Juan trend forms a vein and stockwork system trending 140° and dipping sub-vertically 80-90° to the NNW. Stockwork zones average 12m wide, with a range from 10-20m. Au grades in the stockwork zones are generally 0.1 -0.5 g/t Au with occasional spikey values.

Massive veins/vein breccias within the stockwork envelopes have an average true width of about 3m with a range of 1 -11 m. Higher gold grades are associated with vuggy, drusy and banded quartz veins.

Surface saprolite alteration is developed to a depth of approximately 15-20m.

The Los Angeles vein is a low-sulfidation epithermal breccia and stockwork system.

The mineralized structure strikes 240° and dips steeply to the north at approximately 75-85°. The ore grade portion is confirmed over at least 400m and is open along strike. The zones are also open down dip. The deepest current intersection is well mineralized at 120m vertical from surface. The stockwork zone varies from 3-12m thick, while the higher-grade breccias, are 1.5-3.5m thick.

The best gold grades are associated with hydrothermal breccia, quartz breccia and wall rock breccia with >25% veins and veinlets and banded texture with fine black sulfides.

Surface saprolite alteration is developed to a depth of approximately 25m from surface.

The Jabali vein system as presently known is geologically similar to other known veins within the La Libertad Concession. Gold mineralization at Jabali is hosted in the east-west, northerly dipping quartz vein, quartz breccia and quartz stockwork system. The 6.2 kilometer long vein system has been divided into two zones: Jabali Antenna to the west of the Rio Sucio and Jabali Central to the east. Preliminary multi-element geochemical data in conjunction with drill core logging suggests gold values are associated with the presence of gold-silver sulphosalt mineralization and locally with zinc and possibly lead sulfides. The vein structure is commonly oxidized up to 60 meters below surface. Gold values within this oxidized portion of the vein are commonly associated with increased limonite, jarosite and manganese oxides within vuggy textured quartz breccia veins.

Sulfides are rare near surface due to moderate to strong oxidation within the structure. Jabali Antenna has been drill tested over a strike length of 1,300 meters. The vein system in the current resource ranges in width from 5 to 29 meters, dips 60° to 70° to the north and has vertical extent that ranges from 150 to 250 meters.

Jabali Central has been drill tested over a strike length of 2,650 meters. The vein system in the current resource ranges in width from 5 to 13 meters, dips 80° to the north and has a vertical extent of 50 to 150 meters as presently drilled.

The La Libertad Mine is an open pit and underground operation using conventional open pit methods at the Jabali Antena pits and a bottom-up sequenced long hole stoping mining method with unconsolidated backfill in the Jabalí underground mine.

Mining operations use conventional open pit mining methods at the active Jabali Central pit. Drilling, blasting and ore control are performed by Desminic personnel. Loading and haulage of both ore and waste are performed by a contractor.

Pit slopes vary by geotechnical domain, with bench face angles ranging from 60–70º. Bench heights also vary by geotechnical domain, from 6–18 m. A nominal ramp and road width of 20 m, maximum road gradient of 10%, and minimum layback width of 20 m is used.

Waste rock from the Jabali pits is currently stored in a WRSF located to the southeast of Jabali central.

The equipment used at the mine is conventional for the industry when conducting truck and shovel open pit mining operations, and includes trucks, excavators, dozers, drill rigs, and light vehicles.

The ore is trucked from the mine to the mill and dumped on to an apron feeder. The coarse material is crushed in a primary jaw crusher and combined with the fines and conveyed to the stockpile.

The coarse ore is sent to the grinding circuit consisting of a SAG mill and two ball mills. The SAG discharge and the ball mill discharge have a common sump. The material from the sump is pumped to cyclones and the cyclone underflow goes to the ball mills. The cyclone overflow goes to the thickener. The thickener underflow is pumped to the leach tanks.

The ground ore is leached in eleven tanks with oxygen and cyanide added to tank "0" and tank No. 3. Lead nitrate is also added to leach feed. The leached slurry is processed through a 6-stage CIP circuit where gold and silver soluble values are recovered from solution. The carbon from the first CIP tank is periodically removed and loaded into a special truck and delivered to the ADR plant for stripping, electrowinning and pro ........