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Page 52     SOUVENIR-CHARTERS TOWERS, 1872 TO July, 1950

Present Day Mining

Black Jack Gold Mining Co. N.L.


Manager: Mr. L. H. DRAKE.
Underground Manager: Mr. A. JOCHHEIM.
Mill Manager: Mr. A. C. POOLE.

Cyanide Manager: Mr. J. W. MACKIE.

THE major gold producing mine on the field to-day is the Black Jack Mine. It i's situated 6½ miles from Charters Towers on the Clermont Highway. First discovered and worked in 1875. Worked intermittently until 1886 when rich stone was obtained in the Black Jack P .C. Mine it boomed for three years Then the area was worked intermittently until 1912.
In 1933, due to the efforts of the late Mr. W. Clark, the Black Jack South Block Shaft was cleaned out and has been worked ever since.

Mining Practice.

Overhead cut and fill stoping is the mining method used. Quartz is handled through chutes to the various levels and transported to the surface where it is deposited into the Ore Bin.
The ore is fed through a Jaw Cracker and elevated to the Mill Storage Bin. From the Mill Storage Bin it is fed by challenge feeders into two sets of five head stamper batteries. The crushed pulp is then run over amalgam tables which collect the free gold in the ore on the mercury covered copper plates. After passing over the amalgam tables the ore is fed on to a Wilfley concentrating table which separates the mineral from the ore and passes the sands containing approximately 5 dwts. gold portion into a sand pump which transports it to the Settling Pits. The concentrate mineral product average over 10ozs. gold per ton from the table, is dried and bagged and sent to Port Kembla for treatment. The gold amalgam from the amalgam tables is collected and retorted, which process removes the mercury from the amalgam and leaves the gold which is smelted into a bar to be deposited into the bank for sale to the mint. The sand pumped into the settling' pits is prepared for cyanide treatment. This is done by drying the sands and then depositing' them into 18-ton capacity treatment vats where cyanide solution is pumped on. The cyanide solutions dissolves the gold in the sand and this solution is then run off and passed over zinc shavings in a series of precipitate boxes. The zinc deposits the gold out of solution and the sludge found is dried and roasted to from the precipitate. This precipitate is : then fluxed and smelted in which process the gold is deposited to the bottom of the mould and the slag to the top. This bottom is then smelted again and poured into a bar of precipitate bullion which is deposited in the bank for sale to the mint.
At the present time 52 men are employed at this mine and the fortnightly paysheet amounts to slightly over £800. This means a lot to the town. This is in direct wages only. If indirect amounts paid to firewood contractors and so on were added, the benefit to the town would be much greater.
    Some interesting figures of mines operations are as follows

Proceeds of 'Gold Won

1945 £4608 £6087 £3504 £14199
1946 5354 7679 4722 17755
1947 7548 11264 7203 26015
1948 11047 17386 15785 44218
1949 9166 12760 9110 33638

  Wages Paid. For Above Period

It is important to note that the whole of these wages would be spent in or around Charters Towers.
1945 £8245
1946 10763
1947. 16719
1948 19001
1949 23407

Another promising mine just coming into production is the "Ladybird

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