Figure 6. Downhole plot of rocks types in DDH 10-2028 as determined by visual core logging, and as defined by immobile-element ratios. In this hole, Marshall Zone mineralization lies within the lower part of rhyolite A. A 2.5 m interval of massive sulfides graded 7.2 g/t Au, 470.6 g/t Ag, 1.90 % Cu, 10.30 % Pb, 37.35 % Zn and 5.4 % Ba. Note that most of rhyolite B in this hole was logged as mafic Price Formation due to its dark colour and the presence of vesicles and possible leucoxene flecks. The Price Formation must lie below the end of the hole.



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