Resources

In the traditional way, the raw bauxite samples of SierraMin were washed and resources and grade determined. The overall grade and tonnage of SierraMin Bauxite is presented here in Table 2.

Overall Bauxite Potential of Port Loko

Location Resources in Million Tonnes %Al2O3 Washed %SiO2 Washed
Lungi41.85453.8
Mange70.8345.93.4
Mamaliki4.1745.26.9
Tekeya79.2143.17.7
Yenkisa125.1044.86.5
Total321.1644.75.8

SRK Established 99 million tons of Measured, Indicated and Inferred Resources in the limited explored areas of SierraMin Mining Concession. A summary of SRK JORC compliant resources of SierraMin bauxite of explored area along with footnotes are presented here in Table-3.

JORC Compliant Resources & Grades in Limited Explored Area of SierraMin

Mineral Resource Category Material Type Tonnes(Mt Dry) Al2O3(%) SiO2(%)
MeasuredWashed---
DSO---
IndicatedWashed24457.4
DSO643.87.8
Measured and IndicatedWashed24457.4
DSO643.87.8
InferredWashed69465.9
DSO---
Grand Total 9945.66.4

Notes:

  • The tonnages and grades presented herein are reported on a dry basis.
  • Washed tonnages and grades subjected to washing recoveries calculated for each sample interval (averaging 75%).
  • DSO material is that material which can be direct shipped, i.e. without any processing aside from crushing, therefore no washing or beneficiation.
  • Washed Mineral Resource reported using a bauxite thickness >1 m, >40% washed Al2O3 and <12% washed SiO2.
  • Unwashed ‘DSO’ Mineral Resource reported using cut-off grades of >40% unwashed Al2O3 and <12% unwashed SiO2. This material sits within the washed bauxite material and is therefore not reported above a minimum thickness
  • All figures have been rounded to reflect the relative accuracy of the estimates. Mineral Resources are not Ore Reserves and do not have demonstrated economic viability.