Mining review . NUCCALEENA COPPER MINE, SHOWING face p. 24.] 2o the impregnated zone, for the purpose of carrying out concentration deposit proved, on drilling, to be fairly uniform in texture, and gavecores that were practically complete from each of the two holes drilled. Theaccompanying drawing shows the way in which the drill holes were laid outto sample the full width of the deposit. It will be seen that two holes weredrilled and that there is a slight overlap in the central portion of thedeposit. EXPLANATION. V PVRITIC OUABTZITE ZONE GIBRALTAR PYRITIC DEPOSIT. Se
Mining review . NUCCALEENA COPPER MINE, SHOWING face p. 24.] 2o the impregnated zone, for the purpose of carrying out concentration deposit proved, on drilling, to be fairly uniform in texture, and gavecores that were practically complete from each of the two holes drilled. Theaccompanying drawing shows the way in which the drill holes were laid outto sample the full width of the deposit. It will be seen that two holes weredrilled and that there is a slight overlap in the central portion of thedeposit. EXPLANATION. V PVRITIC OUABTZITE ZONE GIBRALTAR PYRITIC DEPOSIT. Section showing: projection of bores on one plane ^vith results of samplingand concentration tests. The core recovered was divided up according to its appearance intosamples of various lengths, the basis of subdivision being the degree ofimpregnation with pyrites. Thus it was sought to separate the pyritic zoneinto bands which might be individually worked. The core samples weretested by the Government Metallurgist in the experimental laboratory of 26 111. l)»partiiuiit of Mines, and the results obtained from each samph^ areshown brieflv in the following table:— Meiisurcmonts along Bore Sample. Sulphur in Concentrates Sulphur in Bore in Feet. Number. Crude Ore. Produced. Concentrates. 0 to 75 1 11-7 19-8 40-21 75 116 2 3-97 61 32-98 116 131-5 3 8-28 14-5 32-53 131-5 161 161 4 5 4-0 816 11-7 35-31 195 209-5 6 70 10-4 35-2 209 5 237 7 3-56 Not tested ~ 0 to 32 2 { Barrenquart zite I —- — 32 40 2 1 16-3 330 39-2 40 57-5 2 2 1
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectminesandmineralresou
