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Securing the Future (cont’d)<br />
Ore Resource Summary as at 29 March 2012<br />
RESOURCE CLASS VOLUME GRADE Contained Tin (Sn)<br />
(‘000 m 3 ) (KgSn/m3) (Tonnes)<br />
Measured 2,416 2.78 6,721<br />
Indicated 2,759 2.71 7,468<br />
Inferred 16,240 1.66 26,903<br />
TOTAL RESOURCES 21,415 1.92 41,092<br />
Footnote:<br />
RHT grades are Ore Volume grades, whereas PT Koba Tin grades are Total Volume grades (ore + waste). It is not appropriate to<br />
apply a ‘Whole-Of-Hole’ grade calculation to the RHT resource as these resources are primary, hard rock mineralization, which<br />
occurs in the form of veinlets, with various orientations from the top levels extending to depths. Waste materials also occur in<br />
between the veinlets. This differs from the alluvial PT Koba Tin resources and reserves, where a ‘Whole-Of-Hole’ grades can be<br />
calculated, as all the orebodies are horizontally emplaced and the ore : waste zones are clearly defined.<br />
MALAYSIA SMELTING CORPORATION BERHAD (43072-A) • ANNUAL REPORT 2011 33