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 />
Platreef (open-pit operations)<br />
Together with the application of modifying factors, the pit design<br />
determines the economic pit shell.<br />
Scheduling within the economic pit shell according to the relevant<br />
mines’ production requirements defines the Scheduled Reserves.<br />
The Scheduled Reserves are peer-reviewed <strong>and</strong> signed off by the<br />
competent person(s).<br />
The <strong>2011</strong> Ore Reserve has been estimated using pit designs<br />
derived from the 2010 Mineral Resource. Mining studies are in<br />
progress to identify the optimal pit design.<br />
Rock dumps (surface sources)<br />
Bulk samples taken on historical surface rock dumps have<br />
demonstrated the intermittent presence of low-grade reef material.<br />
This stems from historical haulage development on PGM-bearing<br />
markers such as the Pseudo Reef 1, <strong>and</strong> from suboptimal <strong>ore</strong>h<strong>and</strong>ling<br />
processes used in the past.<br />
Owing to the difficulty of effectively evaluating large-scale rock<br />
dumps, surface rock dumps across operations are not <strong>report</strong>ed<br />
under the Ore Reserve <strong>and</strong> Mineral Resource estimates. Instead,<br />
they are considered as Mineral Deposits.<br />
However, rock dumps that have indicated potential are further<br />
sampled <strong>and</strong> evaluated on a localised basis for processing as a part<br />
of surface sources material where concentrator capacity is available.<br />
During <strong>2011</strong>, this occurred at Union, Tumela, Khomanani <strong>and</strong><br />
Siphumelele mines.<br />
A register of all competent persons has been lodged with the<br />
Company secretary. The head of Mineral Resource Management<br />
confirms that the Mineral Resources <strong>and</strong> Ore Reserves information<br />
in this <strong>report</strong> is published in the form <strong>and</strong> context in which it was<br />
intended.<br />
EXTERNAL REVIEWS<br />
In compliance with an internal three-year external review-<strong>and</strong>-audit<br />
schedule, Snowden Mining Industry Consultants (SMIC) were<br />
contracted to conduct the following:<br />
A detailed process review of the Mineral Resource <strong>and</strong> Reserve<br />
generations at the Khomanani, Tumela <strong>and</strong> Union mines.<br />
An assessment of the remedial actions put in place as a<br />
consequence of the 2010 process review at the Bathopele,<br />
Siphumelele, Thembelani, Dishaba <strong>and</strong> Mogalakwena mines.<br />
A detailed numerical audit of data gathering, evaluation <strong>and</strong><br />
of the <strong>report</strong>ing of Mineral Resources <strong>and</strong> Ore Reserves at the<br />
Tumela, Union <strong>and</strong> Mogalakwena mines.<br />
Snowden states in their evaluation summary: “In Snowden’s opinion<br />
APL has estimated Resources <strong>and</strong> Reserves for the Union, Tumela,<br />
Mogalakwena <strong>and</strong> Khomanani operations in accordance with the<br />
definitions <strong>and</strong> guidelines contained in the SAMREC Code. The<br />
processes employed by APL for Mineral Resource <strong>and</strong> Mineral<br />
Reserve estimation are well aligned with industry practice. Snowden<br />
did not identify any material errors during the numbers audit of the<br />
Union, Tumela <strong>and</strong> Mogalakwena operations.”<br />
COMPETENCE AND RESPONSIBILITY<br />
In accordance with the Listings Requirements of the JSE Limited,<br />
Amplats prepared its Mineral Resource <strong>and</strong> Ore Reserve statements<br />
for all operations with reference to the 2007 guidelines <strong>and</strong><br />
definitions of the South African Mineral Resource Committee<br />
(SAMREC). Competent persons have been appointed <strong>and</strong> assume<br />
responsibility for the Mineral Resource <strong>and</strong> Ore Reserve statements<br />
for all our operations <strong>and</strong> projects, as required.<br />
Gordon Smith (Pr Eng, PhD, MBA, MSc (Eng), BSc (Eng))<br />
Engineering Council of SA (930124)<br />
Head: Mineral Resource Management<br />
<strong>Anglo</strong> <strong>American</strong> Platinum Limited<br />
Johannesburg<br />
9 February 2012<br />
12 ANGLO AMERICAN PLATINUM LIMITED <strong>2011</strong>