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-- T-4518 67 <br />I <br />~~ <br /> <br />Figure 41. Photomicrographs of sulfosal[ stage fracture-fillings. a) Chalcopyrite (c), <br />proustite (ps), and pyrargyrite (pr) partially filling a fracture in sphalerite (s); black zones <br />are open space; sample RM-6 (460'). Reflected light, uncrossed polars; field of view is 0.2 <br />mm by 0.3 mm. b) Tennantite (tn), proustite, and chalcopyrite (and possibly galena (g;)) <br />partially filling a fracture in sphalerite (s); black zones are open space; sample RM-6(460'). <br />Reflected light, uncrossed polars; field of view is 0.2 mm by 0.3 mm. <br />