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FIGURE 38. Distribution of supergene mineralization in the Morenci district. All panels
show contours of thickness x copper grade as ft-% (divide by 3.28 to convert to m-%),
and the ultimate planned pit limits, cross section locations for Figures 30, 31 and 32, and
Morenci mine grid for reference. Panel A shows the distribution of leached capping in
the center of the district. Panel B shows the distribution of the partially leached zones in
the center of the district and at Garfield to the north. Panel C shows the distribution of
the enriched blanket that occurs almost everywhere in the district, but is particularly well
developed in the Morenci and Metcalf areas. Panel D shows the cumulative distribution
of all supergene zones and the general coincidence of the ultimate planned pit limits. For
example, the 450 ft-% contour in panel C represents an enriched blanket with a thickness
of approximately 1000 ft (300 m) at an average grade of 0.45% Cu. See text for detailed
explanation.
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FIGURE 38. Distribution of supergene mineralization in the Morenci District. See
opposing page for explanation.