43-101 2007 Technical Report On The San Antonio Project, Baja ...
43-101 2007 Technical Report On The San Antonio Project, Baja ...
43-101 2007 Technical Report On The San Antonio Project, Baja ...
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Derry, Michener, Booth & Wahl Consultants Ltd. Page 3111.0 DRILLING BY PITALLA11.1 Los Planes RC HolesFrom June 27 to December 13, <strong>2007</strong> 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.<strong>The</strong> runner/manager and another driller were Canadians. All helpers were local Mexicans trainedon the job. <strong>The</strong> 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 <strong>San</strong> <strong>Antonio</strong> 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.<strong>The</strong> 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. <strong>The</strong> exploration grid is only about 60% completed. (SeeRecommendations 20)<strong>The</strong> 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. <strong>The</strong> 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 February<strong>2007</strong>. 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. <strong>The</strong>y 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. <strong>The</strong> 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 <strong>2007</strong> with the sameLongyear 44 drill, to confirm the near surface gold mineralization in the central-north section ofthe Los Planes zone.