The depositional basin bounds are defined to the south-west at the east-south east/west-north west trending Rocaforte Syncline near the margin of the Aragón River. To the north-west is the Sierra de Leyre anticlinal structure that overthrusts the Pamplona Marls Formation, the underlying unit of the evaporite. This thrust and two reverse faults run approximately east-west.

The first fault in the north is within the Pamplona Marls over Yesa turbidites. The second is coincident with the Liedena Sandstone, which overlays the evaporite. These faults are considered the extension of the Loiti Fault towards the east which also corresponds to the synsedimentary line between marine sediments within the Basin to the Eocene-Oligocene continental sediments at the thrust front.

The south boundary of the Exploration Target is an important fault running north-west/south-east that extends towards the east acting as limit to Magdalena anticline, considered the southern limit of southeastern section of the Muga Project area. In the west, the fault converges to the Loiti structure beyond the investigated area.

For the planned mine production panels, the tonnage and grade have been diluted by 15 cm of waste in the roof and the floor. The seams are also constrained by a minimum mining height of 2.1 metres which is consistent with the planned mining equipment. The shallow dipping seams utilise a set of two parallel roadways as the main development access, one for fresh air intake and access and the other for exhaust ventilation and conveyor belt materials handling system. The mining method approach is a typical Room and Pillar (“R&P”) panel layout. The room width is specified at 8 metres and the height and pillar size are determined by the total combined seam thickness, geotechnical constraints due to depth below surface and/or any equipment limitations.

The inclined potash seams in the north-west of the deposit require an alternative mining approach to the R&P panel layout used for the shallow dipping seams, to minimise dilution and maximise extraction, taking into consideration the geotechnical constraints and equipment limitations. For the inclined seams the planned dilution effect is considered for extraction by Continuous Miners only. It is assumed that extraction by Road Headers will have no planned dilution as the equipment is able to mine selectively to the dipping seam contact.

Underground access will be by twin parallel declines from surface, over a length of 2.6 km to a depth below surface of approximately 350 meters. The declines, approximately 25 met ........

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