ore reserves and mineral resources 2011 report - Anglo American ...
ore reserves and mineral resources 2011 report - Anglo American ...
ore reserves and mineral resources 2011 report - Anglo American ...
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SECURING OUR FUTURE<br />
ORE RESERVES AND MINERAL RESOURCES<br />
MINERAL RESOURCES EXCLUSIVE OF ORE RESERVES – SOUTH AFRICA<br />
The Mineral Resources exclusive of Ore Reserves tonnage<br />
increased by 11% to 5,399.1 Mt <strong>and</strong> the 4E content increased by<br />
<br />
The Mineral Resources exclusive of Ore Reserves have increased,<br />
mainly at:<br />
Platreef Mogalakwena Mine: Additional b<strong>ore</strong>hole information for<br />
<br />
<br />
<br />
<br />
geological loss have been applied to these elevated Resources.<br />
Conceptual pit shell evaluations have indicated that the existing pit<br />
<br />
Consequently, the Mineral Resource <strong>report</strong>ing depth has increased<br />
<br />
<br />
<br />
The increase in the Mineral Resources is partly offset by:<br />
Mining constraints on the Merensky <strong>and</strong> UG2 reefs:<br />
Investigations conducted in <strong>2011</strong> to determine maximum mining<br />
<br />
<br />
be the limit to mining given anticipated technology, metal prices<br />
<strong>and</strong> energy costs. The affected portion of the Inferred Mineral<br />
<br />
<br />
<br />
<br />
Platreef Mogalakwena Mine: Conversion of Mineral Resources to<br />
<br />
<br />
Inferred Mineral Resources.<br />
UG2 Reef, Merensky Reef <strong>and</strong> Platreef: Mineral Resources exclusive of Ore Reserves (4E Moz)<br />
Changes between 2010 – <strong>2011</strong> (Amplats attributable)<br />
Resources Moz<br />
710<br />
700<br />
690<br />
680<br />
670<br />
660<br />
650<br />
640<br />
630<br />
620<br />
610<br />
600<br />
619.5<br />
New geological information resulted<br />
in localised flattening of the<br />
<strong>ore</strong> body at Mogalakwena North<br />
4.2 (4.5) 3.2 1.7 0.5<br />
71.0 (13.9)<br />
Conversion<br />
Platreef:<br />
Mogalakwena<br />
South<br />
Platreef<br />
(0.6) (3.2)<br />
(1.8)<br />
(3.5)<br />
(1.1)<br />
(0.5) (1.2) (26.1)<br />
(4.6)<br />
Mining constraint<br />
>75° C<br />
Disposal<br />
Wesizwe<br />
639.2<br />
Opening balance<br />
Conversion reallocation, new<br />
information <strong>and</strong> conversion:<br />
MR Rustenburg mines<br />
Conversion, conversion<br />
reallocation <strong>and</strong> new information:<br />
UG2 Rustenburg mines<br />
New technology <strong>and</strong><br />
new information:<br />
mainly UG2 Der Brochen<br />
Conversion reallocation<br />
<strong>and</strong> new information:<br />
MR <strong>and</strong> UG2 Tumela<br />
New information <strong>and</strong><br />
conversion: UG2 Kroondal<br />
<strong>and</strong> Marikana<br />
New information:<br />
Platreef Mogalakwena<br />
Conversion:<br />
Platreef Mogalakwena<br />
Model refinement: Tweefontein<br />
Hill, Tweefontein North <strong>and</strong><br />
Zwartfontein South Platreef<br />
Mining constraint:<br />
Platreef S<strong>and</strong>sloot<br />
Conversion <strong>and</strong><br />
new information:<br />
MR <strong>and</strong> UG2 Union<br />
Conversion reallocation <strong>and</strong><br />
new information:<br />
UG2 <strong>and</strong> MR Twickenham<br />
New information <strong>and</strong><br />
conversion reallocation:<br />
MR <strong>and</strong> UG2 Dishaba<br />
New information <strong>and</strong><br />
conversion: MR <strong>and</strong> UG2<br />
other mines/projects<br />
Mining constraint owing to<br />
structure – reallocation to<br />
Mineral Deposit: Tumela<br />
Mining constraint >75° C<br />
– reallocation to Mineral Deposit:<br />
Tumela, Twickenham, Ga-Phasha<br />
Disposal: MR <strong>and</strong> UG2<br />
Wesizwe<br />
Closing balance<br />
Increase of 19.7 Moz (+3.2%)<br />
10 ANGLO AMERICAN PLATINUM LIMITED <strong>2011</strong>
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