Figure 4
(a.) Reflected plane polarized light photomicrograph of chalcopyrite overgrowths on pyrite in specular hematite matrix in hematite-bearing ores in the Bingham district. Note fine sieve texture of pyrite, and how chalcopyrite corrodes pyrite grains. Silver blades = hematite, pale yellow = pyrite, yellow = chalcopyrite, black = holes. Width of field = 1.35 mm
click here for 81.7 kb image(b.) Combination transmitted and reflected plane-polarized light photomicrograph
of chalcopyrite overgrowths on pyrite in specular hematite matrix in the
C-bed orebody of the Superior district, Arizona. Note how chalcopyrite
corrodes pyrite grains. Silver blades = hematite, pale yellow = pyrite,
yellow = chalcopyrite, pinkish-white gangue (left edge) = quartz. Width
of field = 0.67 mm.
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click here for 31.9 kb image
