pit limits

pit limits

[′pit ‚lim·əts]
(mining engineering)
The vertical and lateral extent to which the mining of a mineral deposit by open pitting may be carried economically.
References in periodicals archive ?
The ore reserves were reported based on mineral resources classified as Measured and Indicated within the economic pit limits above the economic cut-off grade after due consideration of costs and physical constraints.
0x20 The 2012 exploration drilling has been focused along the western and northern edges of Pit 2, partly to expand the pit limits, test mineralization at depth and to infill gaps within the resource model.
In addition, these zones could allow for a wider pit dimension defined in the Preliminary Assessment completed last year which would extend project life by providing access to significant gold resources that currently fall below the designed pit limits.
Most these pits were mined to less than 50m and have significant mineralisation outside the pit limits.
Hole BMD11-060, on the same section as BMD11-059, was drilled in the opposite direction at -50 degrees to test the eastern high wall of the Main Briggs pit and encountered gold mineralization within the design pit limits and beyond the pit wall, as well as an additional, narrow zone of gold mineralization deeper in the hole.
In addition, these zones could allow for a wider pit dimension which would extend project life by providing access to significant gold resources that currently fall below the designed pit limits.
Most of these pits were mined to less than 50m and have significant shallow mineralisation outside the pit limits.
Reserve expansion in the BSU, Argonaut and Main Briggs pits where geologic interpretation indicates the potential to extend ore reserves beyond currently engineered pit limits.
Further drilling may enhance this mine life beyond the currently optimized pit limits.
Most of these pits were mined to less than 50m and have significant mineralisation outside the pit limits.
To determine the final pit limits for the production schedule for the scoping study $10 per ounce for silver was used.
The exploration drilling will test for extensions of the known areas of gold mineralization at the project's Southwest and Central zones, while the infill drilling will be focused on upgrading existing indicated and inferred resources within the projected pit limits of the company's planned open-pit mine at the Northeast Zone.