Bulletin . I (A I Photograph, natural size, of a specimen of ore from the Copper King mineshowing association of ore (rhalcocite and bornitei and calcite. Some of thecalcite whicli is imbedded in the sulphides is in the form of (Bi Photomicrograph of a polished section of ore from Blue Wing mine showingplates of hematite in quartz. Hematite occurs in both sulphides as well as inthe rocks and gangue minerals of the district. An area of intergrown borniteand chalcocite is shown on one side of the figure, and a few small areas ofchalcocite occur in the quartz. White = he
Bulletin . I (A I Photograph, natural size, of a specimen of ore from the Copper King mineshowing association of ore (rhalcocite and bornitei and calcite. Some of thecalcite whicli is imbedded in the sulphides is in the form of (Bi Photomicrograph of a polished section of ore from Blue Wing mine showingplates of hematite in quartz. Hematite occurs in both sulphides as well as inthe rocks and gangue minerals of the district. An area of intergrown borniteand chalcocite is shown on one side of the figure, and a few small areas ofchalcocite occur in the quartz. White = hematite. Light gray ^ chalcocite. Darker gray = gray = quartz. DETAILED DESCKIPTION OF THE VEINS AND ORES. 71 Chlorite.—Chlorite is an abundant gangue mineral in all the mines, butis more plentiful in some than in others. It possesses only its normal char-acteristics, is generally dark green in color, and is likely to be found inmasses made up of tufts or bunches which show an aggregate polarizationeffect somewhat similar to that of chalcedony. In some instances thechlorite might be confused with sericite when the two occur in the samesection. They may be distinguished from each other by noting the factsthat chlorite is almost i
Size: 1592px × 1569px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectgeology, booksubjectm
