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| Historic PCGM Deep Drilling | | | | From 1934 to 1966 PCGM drilled over 3,000 surface and underground drill holes totaling over 150,000 metres. In addition to the drilling information there is another huge data set that consists of composite chip samples from underground workings including drifts, raises, cross-cuts and stopes. Complete drill logs, drill cross sections, level plans showing chip sample locations, longitudinal sections, and assay data are available for this work.The cumulative results of these many years of sampling and analysis were used for day to day mine planning and grade control. At mine closure the remaining un-mined sections that carried over into the final grade/tonnage estimates were based on this information. Wolfden (Downie, 2000) compiled PCGM assay information from drill holes that intersected a series of mineralized zones below the lowest development levels. Eight mined veins (Veins No. 1, 5, 9, 9B, 6, 7, 8 and 12) are open at depth. The table, above, right, summarizes most of the drilling below these levels. It should be noted that the widths shown in the table are not true widths. The true width of the intersections are not known.The historic drilling demonstrates excellent potential for the continuation of high grade gold mineralization below the existing mine levels. There is also some indication that there may be a new style of mineralization, pyritic tuff with quartz stockwork or stringers, below the No. 7 vein in the No. 3 Shaft area. Three holes into this tuffaceous mineralization, 3-28-45, 3-28-54 and 3-28-55A, indicate that wider zones similar to those in the iron formation hosted auriferous zones might be found there. | | |
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