Regional Geology
The Holloway and Holt mines lie within the Southern Abitibi Greenstone Belt (SAGB) of the Superior Province in north-eastern Ontario. The 40 km long, mostly contiguous HoltHolloway property package is a grouping of strategically located claims straddling the Porcupine-Destor Fault Zone (“PDF”) midway along its 260 km length.

Local Geology
The deformation history of the area is defined by five events. The earliest episode of regional D1 deformation (compression and extension) predated the Porcupine angular unconformity at 2,690 Ma. The D2 event (compression and extension) post-dated the Porcupine assemblage and resulted in localized folding and thrusting and early southside up, dip-slip, ductile deformation on regional deformation zones. Broadly synchronous with the syntectonic opening of the Timiskaming basins in dilatational jogs was D3 folding that resulted in significant left lateral slip movement along the PDF. The D4 folding event created synclines within the Timiskaming assemblage rocks and rightlateral strike-slip displacement along the PDF. The D4-D5 event represents the final stage of transpressional deformation along the PDF. Gold mineralization in the HoltHolloway area is interpreted to be early D3 in age. Lightning Zone replacement mineralization is cut by an inter-mineral dike with an age of 2672 ± 1.9Ma, which is overprinted by a later auriferous quartz-carbonate veining event. The bulk of the gold in the Timm ........

Design Criteria
Mining activities at the Holt mine occur in multiple zones concentrated in two regions within the mine. The western region of the mine contains Zone 4 (Upper and Lower), Zone 4 East, V-93 and West McKenna. The eastern region contains Zone 6 (Upper and Lower), Zone 7, U-100 and the remnant pillars of the C-104 Zone (Figure 15-1). All of the planned zones are accessed from existing rail haulage development headings; therefore, the equipment used in each zone remains captive. The Tousignant Zone will be mined as an autonomous zone from surface via a decline access.

The main accesses for all zones are concentrated on four active rail haulage levels: 435, 775, 925 and 1075. Ore is transported on these haulage levels to the shaft ore pass system. Ramp access is available between 1075 and 775 haulage levels. Zone 6 and C-104 have limited access between mining fronts. Zone 4 is accessed from both 925 and 1075 rail haulage levels, with an internal ramp system connecting the upper and lower portions of the zone.

Zone 4
Zone 4 represents the bulk of the mining since resuming operations at the Holt mine in 2010. This zone presents several design challenges due to its geometry: the zone dips at 30? to the horizontal and plunges from the east to the west at approximately 10?. The plunge, in particular, makes the installation of service raises and holes challenging. Ore passes in the zone consist of a series of conventional r ........

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