Mining review . PARABARANA COPPER MINE, ADIT PARABARANA COPPER MINE, FROM THE EAST. To face p. 70.] 71 secondary ores, carbonates, oxides, grey ore, &c., and, in all probability, wherethe supply of this class of ore was exhausted in depth, and the less valuableunaltered pyritic ore was met with, operations were stopped, and a freshsource of supply of the richer minerals was sought for. The consequence of this leasing or tribute work, as far as can be ascer-tained, is that a large amount of comparatively shallow work has been done,and the rich ores extracted, with probably no commen
Mining review . PARABARANA COPPER MINE, ADIT PARABARANA COPPER MINE, FROM THE EAST. To face p. 70.] 71 secondary ores, carbonates, oxides, grey ore, &c., and, in all probability, wherethe supply of this class of ore was exhausted in depth, and the less valuableunaltered pyritic ore was met with, operations were stopped, and a freshsource of supply of the richer minerals was sought for. The consequence of this leasing or tribute work, as far as can be ascer-tained, is that a large amount of comparatively shallow work has been done,and the rich ores extracted, with probably no commensurate amount ofdevelopmental work, and probably no attempt made to utilize the lower-grade primary ore which exists, though of what value and in what quantitiesit is impossible to say, as none of the deeper workings were accessible forinspection. The workings extend, though not continuously, in a general N. and , over a distance of about 44:ch., from the Wheal Mary workings atthe N. end to the southern end of the Kangaroo and Spitfire w
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