La India
The La India Vein Set comprises two cross-cutting structures. The bulk of the mineral resource is hosted by the India-California structure, a normal fault striking 330° and dipping ENE at approximately 70° in the southern zone, 50-60° in the central zone and 45° in the northern zone. The India-California structure displays evidence of trans-tensional movement with a sinistral transverse component inferred.

In the hangingwall zone, a series of steep-dipping veins have formed in contact with the main structure that are interpreted as tension gash fill. The result is a thick mineralised sequence of anastomosing quartz veins and breccias. At the southern strike extent of the structure the mineralised veins do not reach surface, but drilling has demonstrated that the mineralised fault system remains open along strike at depth.

A smaller mineral resource is contained within the approximately EW striking Teresa-Agua Caliente-Arizona veins. These veins form a set of discrete, parallel, and vertical to steeply north dipping veins. The Company has produced a series of detailed geological sections which show the various volcanic lithologies, which have been used as a basis for the geological and mineralisation models.

America Mine
The gold mineralisation at America occurs along the faulted contacts which separate three structural blocks. The America-Escondido structure forms two of the three recognised block boundaries. The structure ........

The open pit mining consist of four deposits: La India, America, Mestiza, and CBX.

The study envisages the development of a large open pit to exploit the La India deposit, which is planned to be approximately 1,275 m long, 475 m wide, with a maximum depth of 370 m. The main geotechnical challenge to the project is the variability in rockmass strength. Several large-scale structures exist in the pit area. Most of these are favourably orientated; however, a few structures are unfavourably orientated or positioned, and thus may affect the stability of some of the slopes.

SRK proposed the following slope geometry for all fresh rock slopes to be used when developing the engineered pit, to achieve the recommended inter-ramp angle:
• 20 m bench height;
• 75° bench face angle;
• 8 m berm width;
• 100 m maximum stack height;
• 30 m ramp/geotechnical berm width; and
• 56° inter-ramp angle.
The overall slope angle is therefore governed by the overall slope height and overburden thickness.

An overall slope angle of 40° has been assumed when developing optimised pits for America, Mestiza and CBZ.

All OP mines are expected to be conventional drill, blast, load and haul operations, with material hauled to the WRD, LG stockpile, or directly tipped at the crusher.

Two Mining Contractors, Espinoza Ingenioros S.A. and Explotec, were approached by the Client in 2019, to provide quotes for the potential min ........

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