The Cerro Barco target area was selected based on the detection of significant advanced argillic and phyllic alteration from ASTER imaging, prominent magnetic and radiometric anomalies and location right on the ACL
Subsequent ground work located areas of extensive copper oxide mineralization on surface, including several historical artisanal mine sites consisting primarily of small shafts and pits.
Prospecting of the area also discovered a large area of intense alteration that has been almost completely oxidized and silicified. Within this alteration zone, quartz magnetite stock work was discovered, displaying potassic alteration and weak copper oxide mineralization towards the covered area. In general, both the stock work and alteration are stronger towards the ACL, running under cover towards the magnetic anomaly.
A large colour anomaly overlies much of the original aeromagnetic anomaly. Subsequent ground magnetics carried out by Arena confirmed this anomaly as well as identified a second circular shape magnetic anomaly under cover located approximately 2km to the northeast.
Results of the chip and subcrop sampling of old workings hosted within strongly hematised andesites and altered diorites on the target returned values up to 2.9% Cu and 2.5g/t Au
It is important to note that the northern part of the area of interest close to the ACL lies under cover and was not seen in the field. The copper porphyry target discovered at Cerro Barco covers an area of approximately nine square kilometers.
- Cerro Barco prospect lies right on the ACL, approximately 50 km SW of La Paloma targets
- Advanced argillic and phyllic alteration identified from ASTER imaging
- Ground work identified CU-Ox mineralization, including ancient workings, quartz magnetite stockwork, and potassic alteration in outcrop
- Ground magnetics by Arena identified two oval magnetic anomalies undercover representing excellent exploration targets for porphyry mineralization