The Brookbank Project area hosts the Brookbank, Cherbourg and Foxear deposits and the Irwin prospect and forms part of the Trans-Canada Property.
The approximate centre of the Brookbank Project is located at 440,100 mE, 5,507,000 mN, using NAD 83, Zone 16 coordinates, or 49º43’N and 87º05’W using geographic coordinates. The project area is located within 1; 50,000 scale NTS map sheet 42E/12 and lies 10 kilometres (straight distance) to the northeast of the town of Beardmore. By road, it is approximately 14 kilometres east of Beardmore along the Trans-Canada highway and 12 kilometres north of the highway by gravel road. Beardmore is about 205 kilometres by the Trans-Canada highway northeast of the airport in Thunder Bay, Ontario.
1.3 Project Size and Ownership
The Brookbank Project consists of 686 mining leases and staked claims totaling 15,080.217 hectares. Greenstone Gold Mines owns100% of the 18 leases that comprise the Brookbank deposit with the remaining portion of the Project subject to two Joint Venture (JV) agreements with Metalore Resources Limited (Metalore). The first JV is a Greenstone 74%/Metalore 26% split with the second a Greenstone 79%/Metalore 21% split.
1.4 Brookbank Deposit Geology
The Brookbank gold deposits comprise the Brookbank Main, the Cherbourg and the Foxear deposits that occur at three different localities within the 6.5 kilometre long Brookbank shear zone. The deposits are located at and/or near the contacts between mafic volcanics and meta-sediments. Thus the deposits appear to have both structural and lithological controls. However, the fact that gold mineralization is not continuous along the entire shear zone suggests that the deposits are related to second order structures rather than the primary shear zone. Gold mineralization occurs within multiple quartz-carbonate stringers, veinlets and/or stockworks that give rise to broad zones of mineralization varying in width from 1 to 2 metres at a depth of about 700 metres to up to 20 to 50 metres wide at or close to surface. This makes the deposit amenable to both selective and bulk mining methods. In section, the deposit is sub-vertical and cone shaped. Analysis of drillhole profiles and sections shows that a large number of drill holes (about 40%) were selectively sampled only in those parts perceived to contain mineralization.