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St Barbara Ltd.
Summary
| Project: | Simberi | |
|---|---|---|
| Deposit: | Simberi Oxide, Simberi Sulphide | |
| Location: | Papua New Guinea | |
| Commodities: | Gold | |
| Date: | 8/23/2016 | |
| Report Code: | JORC | |
| Report Type: | Resource Estimation | |
| Project Stage: | Active Mining & Production | |
| Report details: | 23-8-2016: St Barbara Ltd. announces a Resource Estimation report for its Simberi Oxide, Simberi Sulphide deposit at the Simberi project. Annual update of mineral resources and ore reserves. Ore Reserves and Mineral Resources Statements as at 30 June 2016 | |
| Resources: | (Reserve, P+P): 27.650Mt @ 2.1g/t Au for 1.897Moz Au contained at Simberi | |
| CP/QP: | [Resources]: Jane Bateman, Robert Love (Internal) | |
| ABSTRACT: | Ore Reserves and Mineral Resources Statements as at 30 June 2016. A revised Mineral Resource estimate was completed for Simberi Oxide incorporating an updated base of oxidation model, based on sulphur assays and geological logging data. Previous models did not account for sulphur content. In addition, material that was previously classified as ‘transitional’ (partly oxidised) and reported as part of the oxide resource is now reported as part of the sulphide resource. The previous publicly reported Measured, Indicated and Inferred Oxide Mineral Resource Estimate reported at 30 June 2015 was 43,979 kt @ 1.0 g/t Au containing 1,413 koz of gold. This has decreased by 462 koz of gold to 29,428 kt @ 1.0 g/t Au containing 951 koz of gold. Variances between the two estimates are primarily due to depletion through mining and removal of transitional ore. The previous publicly reported Proved and Probable Ore Reserve Estimate reported at 30 June 2015 was 38,999 kt @ 1.7 g/t Au containing 2,103 koz of gold. This has reduced by 206 koz of gold to 27,650 kt @ 2.1 g/t Au containing 1,897 koz of gold. The Simberi reserve combines the oxide reserve with 14,094 kt @ 1.3 g/t Au containing 576 koz of gold and the sulphide reserve with 13,556 kt @ 3.0 g/t Au containing 1,321 koz of gold. The Simberi sulphide reserve profile variance from previous years predominately relates to changes in the sulphide resource model and an update to modifying factors as defined through the updated pre-feasibility study for sulphide treatment at Simberi. | |
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