Tropicana Gold Project Ore Reserve increaseTuesday, July 26, 2011
The Ore Reserve estimate for the Tropicana Gold Project in Western Australia has increased by 540,000 ounces.
The Tropicana Gold Project, 330 kilometres east-northeast of Kalgoorlie, is part of the Tropicana Joint Venture, owned by AngloGold Ashanti Australia Ltd (70% and manager) and Independence Group NL (30%).
The Mineral Resource and Ore Reserve at Tropicana was updated as at June 30, 2011, to reflect recent increases in the gold price and changes to the resource model through increased drill density in the Havana South and Boston Shaker zones.
The Measured, Indicated and Inferred Mineral Resource estimate increased slightly to 78.6 million tonnes grading 2.12 grams Au per tonne containing 5.36 million ounces of gold, while the Ore Reserve estimate increased more significantly to 56.4 Mt grading 2.16 g/t Au containing 3.91 Moz of gold (see Table 1).
The increased Ore Reserve estimate was primarily due to the inclusion of the Boston Shaker pit, which added 243,000 oz, and conversion of Inferred Resources into Indicated status at Havana South, which added a further 257,000 oz Au. The use of higher gold prices (see Table 2) also had a positive impact.
The majority of drilling included in the estimate was infill drilling, and as such, the changes to the Mineral Resource are relatively small, largely reflecting changes in the gold price and cut-off grade.
Drilling is continuing in the Swizzler area (between the Tropicana and Havana pits) and at Havana Deeps. A pre-feasibility study is being carried out on open pit and underground mining options of the Havana Deeps mineralisation and is anticipated to add to Mineral Resource.
The Boards of AngloGold Ashanti and Independence approved development of the Tropicana Gold Project in November last year. Based on Mineral Resource and Ore Reserve estimates at that time, the approved project was to produce between 470,000-490,000 ounces of gold per annum in its first three years of production and would average 330,000-350,000 oz pa over the life of the operation, which was estimated to be at least 10 years. Cash costs were forecast to be A$580/oz-A$600/oz in the first three years.
The effect of increases in Mineral Resource and Ore Reserves since November 2010 has not been reflected in these production or cash cost forecasts.
The capital cost, including pre-production expenditure, is estimated to be A$690-A$740 million (real).
Construction of 220 kilometres of new road from Pinjin to Tropicana began in the June quarter and detailed engineering design is underway, ahead of plant construction starting in early 2012.
The project remains on schedule to pour first gold in the December quarter of 2013.
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JORC Compliance: The information in this report that relates to Ore Reserves is based on information compiled by Marek Janas, a full time employee of AngloGold Ashanti Australia Ltd, who is a member of the AusIMM. Marek Janas has sufficient experience relative to the type and style of mineral deposit under consideration, and to the activity which has been undertaken, to qualify as a Competent Person (or Recognised Mining Professional) as defined in the 2004 Edition of the JORC Code. Marek Janas consents to the release of this reserve based on the information in the form and context in which it appears.
The information in this report that relates to Mineral Resources is based on information compiled by Mark Kent, a full-time employee of AngloGold Ashanti Australia Ltd, who is a member of the AusIMM. Mark Kent has sufficient experience relative to the type and style of mineral deposit under consideration, and to the activity which has been undertaken, to qualify as a Competent Person (or Recognised Mining Professional) as defined in the 2004 Edition of the JORC Code. Mark Kent consents to the release of this resource based on the information in the form and context in which it appears.
The information in this report that relates to Exploration Results is based on information compiled by Mark Doyle, a full-time employee of AngloGold Ashanti Australia Ltd, who is a member of the AusIMM. Mark Doyle has sufficient experience relative to the type and style of mineral deposit under consideration and to the activity that has been undertaken, to qualify as a Competent Person (or Recognised Mining Professional) as defined in the 2004 Edition of the JORC Code. Mark Doyle consents to the release of this resource based on the information in the form and context in which it appears.