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Conference Proceedings

The AusIMM Proceedings 1913

Conference Proceedings

The AusIMM Proceedings 1913

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Open stoping on wide lodes (south mine practice)

THE ore-body on the South Mine is a combination of pitching and dipping shoots, all connected at some point (as so far discovered) with the narrow vein running along the footwall fault. The dip is north-westerly and the pitch south-westerly. The pitch is the predominating feature-that is to say, the lodes are altered in position from level to level more under its influence than under that of the dip. While the dip is only marked on the north end of the mine (throwing the lode there 25 ft. north-west in a 100-ft. lift), and has faded out practically 1500 ft. further south, the pitch continues practically without change for each particular shoot. On the western ore-bodies this pitch is pronounced, throwing the lode 160 ft. south-west in a 100-ft. lift, but is less in the ore-bodies nearer the footwall, where the displacement would be 100 ft. It affects also the narrow lode on the footwall, for all the enlargements of that lode are found further south as progress is made downwards. The " dipping " walls are schists, especially weak on the north end of the mine and elsewhere in the narrow footwall lode. The "pitching " walls are also schists, and also weak when exposed.
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  • Published: 1912
  • PDF Size: 0.706 Mb.
  • Unique ID: P_PROC1913_1966

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