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Securing the Future (cont’d)
Ore Reserves and Resources summary as at 30 June 2011
34
Category Volume,
‘000 m 3
Reserves - Proven
- Probable
Building on Success: Developing Resources for the Future
2,473
49,474
Whole-of-Hole
Grade, Kg Sn/m 3
0.29
0.29
Contained Tin
(Sn)
tonnes
725
14,495
Total Reserves 51,947 0.29 15,220
Resources - Measured
- Indicated
- Inferred
pt koBa tIn
PT Koba Tin undertakes alluvial mining operations in the island
of Bangka, Indonesia. It mines the alluvial deposit using a
large capacity bucket line dredge and several gravel pumps
in combination with palong (sluices boxes) units. The mining
units are served by large fleets of earthmoving equipments for
overburden removal and for transfer of tin-bearing materials to
the processing plants.
Exploration activities are ongoing for discovery of new
resources especially at locations previously excluded from the
current production schedule including lower grade areas and
deeper ground as well as in areas designated as “production
forests”. The discovery of additional resources would justify the
extension of its CoW for a further 10 years to 2023.
13,604
36,943
45,617
Total Resources 96,164 0.20 18,935
Total Reserves and Resources 148,111 0.23 34,155
0.32
0.15
0.20
4,393
5,488
9,054