43-101 2007 Technical Report On The San Antonio Project, Baja ...

Derry, Michener, Booth & Wahl Consultants Ltd. Page 3111.0 DRILLING BY PITALLA11.1 Los Planes RC HolesFrom June 27 to December 13, 2007 a total of 75 Reverse Circulation, 5.5 inch diameter (“RC”)holes, totaling 14,981 m, were drilled at Las Planes by Layne Christiansen Drilling Co. ofHermosillo. Average hole length was 200 metres.The runner/manager and another driller were Canadians. All helpers were local Mexicans trainedon the job. The drilling was supervised by Pedro Teran, B.Sc., (Qualified Person on site), anexperienced exploration and mining geologist from Hermosillo, who is the general manager ofthe San Antonio project. Visual and binocular chip logging was done by Francisco Mugica,B.Sc., a senior geologist who had logged core/chips for Echo Bay at Paredones Amarillos in1996/7 and also by a Pitalla geologist, Armando Contreras, B.Sc., working under his direction.The database and QA/QC procedures were compiled by Isaac Antuna, M.Sc., a PitallaGeosciences Engineer.Figure 11.1 shows the Hole layout in the Drill plan for both Planes and Colinas. It is anorthogonal grid, measuring 800m N-S x 300m E-W, with holes drilled generally, but not exactly,at 50m intervals, both E-W and N-S. The exploration grid is only about 60% completed. (SeeRecommendations 20)The mineralized cataclasite zone strikes generally N-S and dip about 45-50 degrees west, thusthe vertical RC holes cut a zone length expanded by a factor of 1.4.Down-hole surveys were carried out for dip and deviation using a Reflex Easy Shot system bythe contactor Layne de Mexico. The RC (Core) rig was a truck-mounted Schramm Drill,mobilized from Edmonton to Hermosillo; it could move about easily through the desert scrubterrain on tractor roads made by a local contractor. Pre-numbered drill sites were laid out byBrunton compass and chain, working off the surveyed grid.All hole collars were surveyed by Mario Alberto Moyron, working from La Paz, in February2007. Also present was Mr. Charles Skipper, Jr., former Chief Surveyor for Echo Bay Mexicowho had previously surveyed the Echo Bay drill hole collars and trenches. They were able toaccurately tie the old EBX drill hole locations to the INEGI National Survey monuments nearLos Planes, something EBX was unable to do in 1995 to 1997. The map base is NAD 27 and theholes were surveyed by GPS Trimble.11.2 Los Planes Core HolesPrior to the main RC program, three, short – 50 East dipping core holes, LCDD – 18, 19, 20(398.2 m) were drilled by Diamond Drilling Specialists, of Arizona, in May 2007 with the sameLongyear 44 drill, to confirm the near surface gold mineralization in the central-north section ofthe Los Planes zone.