Figure F83. Enlargement of part of Figure F82, , showing chalcopyrite inclusions ("chalcopyrite disease") in sphalerite. Note the galena inclusion in the small pyrite crystal at the bottom of the photograph (Sample 193-1189A-2R-1 [Piece 15, 113-115 cm]; in reflected light; oil immersion; width of view = 0.14 mm. Photomicrograph ID# 1189A

Figure F83. Enlargement of part of Figure F82 showing chalcopyrite inclusions ("chalcopyrite disease") in sphalerite. Note the galena inclusion in the small pyrite crystal at the bottom of the photograph (Sample 193-1189A-2R-1 [Piece 15, 113-115 cm]; in reflected light; oil immersion; width of view = 0.14 mm. Photomicrograph ID# 1189A_72; thin section 33).