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Centamin Plc
Summary
| Project: | Kona | |
|---|---|---|
| Deposit: | Kona South | |
| Location: | Cote D'Ivoire | |
| Commodities: | Gold | |
| Date: | 3/29/2019 | |
| Report Code: | NI43-101 | |
| Report Type: | Resource Estimation | |
| Project Stage: | Pursuing Resources Definition | |
| Report details: | 29-3-2019: Centamin Plc announces a Resource Estimation report for its Kona South deposit at the Kona project. Initial mineral resource estimate at Kona South. The gold concentrations were estimated by recoverable Multiple Indicator Kriging (MIK) using th | |
| Resources: | (Resource): 19.6Mt @ 1.03g/t Au (Ind.), 16Mt @ 0.9g/t Au (Inf.) | |
| CP/QP: | [Resources]: Rupert Osborne (H&S Consultants Pty Ltd.) | |
| ABSTRACT: | The gold concentrations were estimated by recoverable Multiple Indicator Kriging (MIK) using the GS3 geostatistical software. The method of recoverable MIK was developed during the early 1980’s with a particular view toward addressing some of the difficult problems associated with estimation of resources in mineral deposits. MIK is one of a number of non-linear methods developed at that time, which can be used to provide better estimates than the more traditional methods of OK and inverse distance weighting. Centamin provided H&SC with a series of wireframe solids representing the interpreted zones of elevated gold grades. H&SC used these wireframes as the basis to create a new series of wireframe solids that were suitable for MIK estimation. These changes were made to include peripheral mineralisation and produce zones of reasonably consistent thickness. These wireframe solids were created to encompass coherent zones of gold mineralisation elevated above background values. This nominally resulted in a gold grade boundary of about 0.05 g/t. H&SC also created a series of wireframe surfaces for each deposit representing the base of transported material, the base of saprolite and the top of fresh rock using drill hole logging information. The orientation of the mineralisation at the Doropo deposits varies significantly between deposits. Mineralisation at Kona South is relatively coherent compared to many gold deposits and shows good continuity in the along strike and down-dip directions and less continuity in the direction perpendicular to these. | |
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