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OZ Minerals Ltd.
Summary
| Project: | Prominent Hill | |
|---|---|---|
| Deposit: | Prominent Hill | |
| Location: | Australia | |
| Commodities: | Copper-Gold-Silver | |
| Date: | 11/12/2018 | |
| Report Code: | JORC | |
| Report Type: | Resource Estimation | |
| Project Stage: | Active Mining & Production | |
| Report details: | 12-11-2018: OZ Minerals Ltd. announces a Resource Estimation report for its Prominent Hill deposit at the Prominent Hill project. Annual update of mineral resources and ore reserves at the project. The Prominent Hill June 2018 Mineral Resource has been es | |
| Resources: | (Reserve, P+P) 69Mt @ 1.0% Cu, 0.6g/t Au, 3g/t Ag | |
| CP/QP: | [Resources]: Colin Lollo (Internal) | |
| ABSTRACT: | The Prominent Hill June 2018 Mineral Resource has been estimated at 130 million tonnes of copper mineralisation grading 1.1 per cent copper and 0.6 grams per tonne gold and 20 million tonnes of gold mineralisation grading 1.2 grams per tonne gold. The Prominent Hill Mineral Resources consist of the Prominent Hill Underground and Surface Stockpiles. Mineral Resources are inclusive of Ore Reserves. This Mineral Resource estimate update supersedes the previously reported Mineral Resource estimate in the ASX release “Prominent Hill underground Reserve growth continues, mine life extended to 2029” released on 21 November 2017. The updated Prominent Hill Mineral Resource estimate includes, where applicable, additional delineation and grade control drilling completed since the cut-off date of the previous Mineral Resource release, reflects geological interpretation adjustments and improved classification confidence, and mining depletion. The June 2018 Copper Mineral Resource estimate is 7 per cent lower in mineralisation tonnes, 9 per cent lower in copper metal tonnes and 4 per cent lower in gold ounces than the previous Mineral Resource estimate. The Gold Mineral Resource estimate is 12 per cent lower in mineralisation tonnes and 18 per cent lower in gold ounces. The Prominent Hill iron-oxide copper gold (IOCG) deposit is located in the north-eastern portion of the Archaean to Mesoproterozoic Gawler Craton, South Australia (Figure 1). The Gawler Craton covers approximately 600,000 square kilometres of South Australia. Outcrop in the Mount Woods region is sparse and much of the current understanding of the Mount Woods Domain comes from exploration drilling and geophysical datasets. The Gawler Craton hosts Olympic Dam, Prominent Hill, Carrapateena, and a number of other smaller and sub-economic copper-gold deposits. Most of these deposits are thought to be genetically related to the Gawler Range Volcanic (GRV) – Hiltaba magmatic event which affected the central and eastern portions of the Gawler Craton around 1600-1580 million years ago. Copper-gold-silver mineralisation at Prominent Hill is mostly hosted within hematite-matrix breccia containing fragments of sandstone, siltstone, dolostone, and mafic to intermediate volcanic rocks. Copper mineralisation occurs as disseminations of chalcocite, bornite and chalcopyrite in the matrix of the breccia | |
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