Review of International Operations
St Ives Gold Mine
Technical short form report (PDF - 2MB)
The St Ives Gold Mining Company (Pty) Limited is wholly owned by Gold Fields Limited and is situated within the highly prospective Norseman-Wiluna Greenstone Belt in Western Australia. The St Ives operations are situated within mining tenements comprised of 277 mining titles (54,749 hectares), three mineral titles (364 hectares), 14 exploration licences (27,572 hectares), 45 prospecting licences (7,190 hectares) and 19 miscellaneouslicences (14,634 hectares) for a total area of approximately 104,509 hectares.
St Ives represents a solid base for growth in Australia and is an important contributor to the Gold Fields vision, “To be the global leader in sustainable gold mining,” with a target contribution from the Australasia Region of 1,0 Moz per annum in production or in development by 2015.
Declared Mineral Resources at the St Ives Gold Mine decreased by 450 koz primarily due to depletion and closure of the Belleisle mine during 2011, while the Mineral Reserves, inclusive of a depletion of 520 koz since December 2010, was steady at 2.8 Moz. Changes to Mineral Reserves from December 2010 were dominated by discoveries at Neptune, Cave Rocks, Trinidad and the Britannia Footwall project, with nominal growth at Hamlet and Athena.
The St Ives Life of Mine (LoM) was extended by an additional year, as discovery and opportunities associated with the higher gold price contributed towards additional Mineral Reserves. Ongoing exploration achievements and increased drilling of the mine’s extensive greenfields project pipeline in a major well-endowed gold camp provides the basis for further Mineral Resource extensions and discovery.
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Open pit mining |
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Total mined |
kBCM |
7,977 |
|
3,269 |
13,464 |
12,220 |
13,845 |
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Waste mined |
kBCM |
6,387 |
|
2,508 |
10,850 |
9,921 |
11,807 |
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Ore mined |
kt |
4,307 |
|
2,053 |
6,643 |
5,799 |
5,143 |
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Mined grade |
g/t |
1.8 |
|
1.9 |
1.4 |
1.5 |
1.7 |
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Strip ratio (volume) |
waste:ore |
3.4 |
|
3.3 |
4.2 |
4.3 |
5.8 |
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Underground mining |
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Ore mined |
kt |
1,768 |
|
904 |
1,444 |
1,222 |
901 |
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Mined grade |
g/t |
4.7 |
|
4.9 |
4.7 |
5.1 |
5.2 |
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Processing |
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Mill tonnes |
kt |
4,793 |
|
2,419 |
4,766 |
4,821 |
4,647 |
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Heap leach tonnes |
kt |
1,952 |
|
866 |
2,052 |
2,441 |
2,586 |
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Total tonnes |
kt |
6,745 |
|
3,284 |
6,819 |
7,262 |
7,233 |
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Mill head grade |
g/t |
3.0 |
|
3.2 |
2.7 |
2.8 |
2.7 |
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Heap leach head grade |
|
0.8 |
|
0.9 |
0.8 |
0.9 |
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Total head grade |
g/t |
2.4 |
|
2.6 |
2.2 |
2.1 |
2.0 |
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Mill yield |
g/t |
2.8 |
|
3.0 |
2.5 |
2.5 |
2.5 |
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Heap leach yield |
g/t |
0.5 |
|
0.5 |
0.5 |
0.5 |
0.6 |
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Combined yield |
g/t |
2.1 |
|
2.3 |
1.9 |
1.8 |
1.8 |
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Plant recovery factor Mill |
% |
94 |
|
94 |
93 |
91 |
93 |
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Heap leach |
% |
55 |
|
58 |
56 |
56 |
64 |
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Gold Produced |
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Mill |
koz |
433 |
|
230 |
389 |
394 |
371 |
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Heap leach |
koz |
32 |
|
13 |
32 |
37 |
47 |
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Total gold produced |
koz |
465 |
|
243 |
421 |
428 |
418 |
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kg |
14,449 |
|
7,557 |
13,097 |
13,322 |
12,992 |
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Financials |
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Operating cost |
A$/oz |
867 |
|
781 |
832 |
806 |
644 |
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Total cash cost |
A$/oz |
873 |
|
757 |
806 |
805 |
649 |
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US$/oz |
901 |
|
710 |
710 |
596 |
582 |
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Capital expenditure |
A$ million |
177 |
|
59 |
117 |
93 |
120 |
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Notional cash expenditure (NCE) |
A$/oz |
1,248 |
|
1,025 |
1,110 |
1,023 |
932 |
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US$/oz |
1,287 |
|
962 |
978 |
757 |
836 |
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General |
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Employees (TEC) |
number |
796 |
|
778 |
766 |
699 |
661 |
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Mineral Reserves |
Mt |
37.9 |
|
32.7 |
30.6 |
30.1 |
25.9 |
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Mineral Reserve Head Grade |
g/t |
2.3 |
|
2.7 |
2.3 |
2.4 |
2.3 |
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Mineral Reserves |
Moz |
2.8 |
|
2.8 |
2.3 |
2.3 |
1.9 |
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Expected Life of Mine |
years |
7 |
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6 |
4 |
4 |
4 |
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| 1 |
Figures shown represent the six months to 31 December 2010. Rounding off of figures presented in this report may result in minor computational discrepancies. Where this
occurs it is not deemed significant. |
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