Resource & Reserve
Kalium Lakes has adopted both the JORC Code and the Canadian Institute of Mining, Metallurgy and Petroleum (CIM) NI 43-101 standard of disclosure for the reporting of Mineral Resources and Reserves.
The CIM has developed best practice guidelines for mineral resource and reserve estimation of Brines which requires the following to be determined:
- The extent of the Brine body and aquifer geometry;
- Brine elemental chemistry and variability;
- Total porosity (Pt) and effective (drainable) porosity (Pe);
- Specific yield (Sy) = yield of drainable fluid obtained under gravity flow conditions Pe = Sy + Sr (where specific retention (Sr) = retained fluid in aquifer material);
- Permeability, hydraulic conductivity and transmissivity of sediment lithology;
- Only specific yield should be used as the measure of total brine endowment not total porosity. This requires pump tests of sufficient duration to determine parameters;
- Ore Reserves need to consider bore field engineering, evaporation parameters and suitable process flowsheets for cost effective recovery of the target metal ions; and
- Brine resources and Brine reserves are to be reported as available cubic meters of Brine with a grade for the valuable elements (e.g., K and Mg).