Publication date: 18.10.2021 00:00
Key Findings: CSA Global believes that data collection practices are largely consistent with industry best practices and are appropriate for use in preparing MREs for JORC reporting. Available QC data indicate that laboratory results pose minimal risk to the reliability of the MRE.
The MRE is based on a three-dimensional interpretation of the mineralization of zinc and lead, after which the boundaries of the mineralization were determined and the content was interpolated within the defined areas of the mineralization of zinc and lead. The main interpolation method used was conventional kriging (OK) using indicators in a box model, with validation of the results using inverse distance weighting (IDW) techniques in which the sample was weighted to the nearest two and three.
CSA Global has not identified any fatal deficiencies that could potentially significantly affect IMO, both in terms of resource volumes and quality of appraisal, and believes that there are reasonable prospects for possible profitable production of the field.
The MRE is based on a three-dimensional interpretation of the mineralization of zinc and lead, after which the boundaries of the mineralization were determined and the content was interpolated within the defined areas of the mineralization of zinc and lead. The main interpolation method used was conventional kriging (OK) using indicators in a box model, with validation of the results using inverse distance weighting (IDW) techniques in which the sample was weighted to the nearest two and three.
CSA Global has not identified any fatal deficiencies that could potentially significantly affect IMO, both in terms of resource volumes and quality of appraisal, and believes that there are reasonable prospects for possible profitable production of the field.
CSA Global has developed separate frameworks for zinc and lead mineralization. Subsequently, an assessment of the lead and zinc content was carried out within each mineralized shell of the deposit, while the following work is recommended to support the ongoing research and evaluation of the Project:
1. Determine the number of double wells to check some historical results. Priority areas should be based on pit optimization results. Initial boreholes should be planned within the defined open pit shell.
2. Complete additional geological, structural and geochemical studies to support the improved 3D geological and mineralization model.
3. Perform and conduct bulk density measurements for future well drilling programs for various lithologies and oxidation zones to provide more accurate tonnage predictions during the mining phase.
4. Analyze the resulting borehole core material using ICP-MS analysis for multi-element elements to develop a geometric model that:
2. Complete additional geological, structural and geochemical studies to support the improved 3D geological and mineralization model.
3. Perform and conduct bulk density measurements for future well drilling programs for various lithologies and oxidation zones to provide more accurate tonnage predictions during the mining phase.
4. Analyze the resulting borehole core material using ICP-MS analysis for multi-element elements to develop a geometric model that:
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provide a clearer understanding of geology
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allow you to identify promising areas for development
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develop methods for quantifying zinc and lead-containing minerals such as sphalerite, smithsonite, galena, cerussite and anglesite
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to develop technological regulations for metallurgical processing.
Perform additional metallurgical testing and quantitative mineralogy, particularly to validate oxide and transition geometry.
