The parallel vein systems in the Soto Norte Project area are defined over a strike length of 2.6 km and the two main vein systems considered, Mascota and Gigante, each have strike lengths of around 2.0 km. Other minor vein structures of mining interest have strike lengths as low as 15 m.
The majority of vein structures are sub vertical, dipping from 70 to 80° and can range in true width from 1 m or less to over 30 m (typically between 3 and 18 m). There are some vein structures in the hangingwall zones which dip at 60°, and an isolated zone in the southwest where the vein lays over on a 15° dip, closer to surface.
The vein structures extend to surface, with significant variances in elevation due to the terrain, and are open at depth and along strike. The depth limit of the resources considered for mining is 2,100 mRL.
The minimum stope width defined for mining is 2.5 m and stoping blocks are categorised as follows:
- Longitudinal narrow stoping for stope widths from 2.5 to 5m;
- Bulk (or wide) longitudinal stoping for stope widths greater than 5m.
The predominant mining method considered for the Project is Modified Avoca for stoping blocks identified as longitudinal narrow and wide stopes. CRF is applied to limited specific areas of poor ground classification.
The mine plan supporting the Mineral Reserve targets a sustainable production rate of 2.6 Mtpa over a 7- year period. The ramp up to full produc ........
