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Pasacancha
Pasacancha is a past-producing underground silver-lead-zinc mine, where high grade vein and fault structures were worked by the Compania Minera Tarica S.A. in the 1950's and 1960's. Mineralization is hosted by phyllic altered diorite with stockwork sulfide veinlets, sulfide vein and shear structures, and brecciated and mineralized sedimentary host rock. Pasacancha is located approximately two kilometres to the east of the main Aguila zone.
Duran views the Pasacancha zone as a potentially bulk mineable polymetallic target, with strong silver-lead-zinc mineralization found through large volumes of sedimentary and diorite intrusive. Underground sampling and mapping indicates that large volumes of rock have strong sulfide stockwork and disseminated mineralization developed in the host diorite porphryry, and that the sedimentary host rock has large zones with veinlet and fracture controlled mineralization. Silver-lead-zinc mineralization has been mapped and sampled in five main underground levels with 270 metres of elevation difference from the lowest to highest. The main zone appears to be 100 to 150 metres wide and has been mapped for roughly 500 metres of strike length. There are numerous smaller workings, which have yet to be reviewed with detail.
Drilling in the Pasacancha area has been complicated by strongly brecciated and fractured host sedimentary rock, as well as steep topography. The geometry of the zone is much better understood after drilling here, and a strong low-angle thrust fault has been defined which has displaced the upper part of the zone to the northeast.
The 2009 geophysical survey was very successful in the Pasacancha area, defining several large and intense IP chargeability highs, which coincide with pyrite in the phyllic alteration which predominates here.
Diamond drill hole 08 PAS 004B successfully cut the main mineralized zone and returned 34.4 metres of 55.4 grams silver/tonne, 0.53% lead, and 0.97% zinc. Continued field work and drilling is planned for the Pasacancha zone in the future.
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