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Mineral Resources
Mineral Resources
The Magarini Sands which host the Kwale deposit are believed to be of aeolian origin, deposited as coastal dunes after conditions of intense erosion. The Kwale deposit generally is poorly stratified and contains a fraction of clay and silt of about 24%. HM, mainly ilmenite, rutile and zircon, are concentrated locally and are abundant in some places.
The general stratigraphic sequence of the Kwale deposit is composed of a brown sand at the surface, followed by orange or reddish sand, becoming more beige or pinkish at depth. The base of the deposit is weathered sandstone from the basal formation. White sand and clay are also described at the bottom of several holes. A typical cross-section of the Kwale Central Dune is shown below.
Vaaldiam drilled 249 holes into the deposit in 1997 and Base completed a further 275 holes in late 2010. The figure below illustrates the density of drilling over the Central Dune.
The Mineral Resource estimates for Kwale are compliant with the JORC (2004) code for reporting Mineral Resources. At a HM cut-off grade of 1%, the Mineral Resource estimates for the Central Dune and South Dune deposits are summarised in the table below. All tonnes and grade information has been rounded, hence small differences may be present in the totals. All of the Mineral Resource information is inclusive of Ore Reserves.
JORC Compliant Mineral Resource Estimate
| Dune | Classification | Resource | HMC | Ilmenite | Rutile | Zircon | ||||
|---|---|---|---|---|---|---|---|---|---|---|
| (Mt) | (%) | (Mt) | (%) | (Mt) | (%) | (Mt) | (%) | (Mt) | ||
| Central | Measured | 46.21 | 7.06% | 3.26 | 4.01% | 1.85 | 0.93% | 0.43 | 0.43% | 0.20 |
| Indicated | 29.94 | 4.56% | 1.37 | 2.47% | 0.74 | 0.61% | 0.18 | 0.26% | 0.08 | |
| Total | 76.15 | 6.08% | 4.63 | 3.40% | 2.59 | 0.80% | 0.61 | 0.36% | 0.28 | |
| South | Measured | 40.02 | 3.77% | 1.51 | 1.95% | 0.78 | 0.54% | 0.22 | 0.22% | 0.09 |
| Indicated | 29.85 | 3.36% | 1.00 | 1.36% | 0.41 | 0.39% | 0.12 | 0.17% | 0.05 | |
| Total | 69.87 | 3.59% | 2.51 | 1.70% | 1.19 | 0.48% | 0.33 | 0.20% | 0.14 | |
| Combined | Measured | 86.23 | 5.53% | 4.77 | 3.05% | 2.63 | 0.75% | 0.65 | 0.33% | 0.29 |
| Indicated | 59.79 | 3.96% | 2.37 | 1.92% | 1.15 | 0.50% | 0.30 | 0.22% | 0.13 | |
| Total | 146.02 | 4.89% | 7.14 | 2.59% | 3.78 | 0.65% | 0.94 | 0.29% | 0.42 | |
Note: ** No pre-stripping assumed.
COMPETENT PERSONS STATEMENT
Information on this website that relates to Mineral Resources at the Kwale Project is based on information compiled by BSE’s Manager – Geology, Scott Carruthers, who is a member of The Australasian Institute of Mining and Metallurgy. Mr Carruthers has sufficient experience which is relevant to the style of mineralisation and type of deposit under consideration and to the activity which he is undertaking to qualify as a Competent Person as defined in the 2004 Edition of the ‘Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves’. Mr Carruthers consents to the inclusion in this announcement of the information based on his work in the form and context in which it appears.