REVIEW OF THE YEAR
Review of operations: Namibia (PDF - 230.5KB)
Review of operations
Description: AngloGold Ashanti owns 100% of the Navachab open-pit gold mine.
Location: Navachab is located near Karibib in Namibia, on the southern west coast of Africa.
Geology: The Navachab deposit is hosted by Damaran greenschist-amphibolite facies, calc-silicates, marbles and volcanoclastics. The rocks have been intruded by granites, pegmatites and (quartz-porphyry dykes) aplite and have also been deformed into a series of alternating dome and basin structures. The mineralised zone forms a sheet-like body which plunges at an angle of approximately 20° to the north-west. The mineralisation is predominantly hosted in a sheeted vein set (±60%) and a replacement skarn body (±40%).
The gold is very fine-grained and associated with pyrrhotite, and minor to trace amounts of pyrite, chalcopyrite, maldonite and bismuthinite. Approximately 80% of the gold is free milling.
Operating performance: Milled tonnages and recovered grade dropped in the first half of the year as no ore was mined while the operation made the transition to owner-mining, although stockpiles were treated during this period. Tonnage throughput increased in the second half of the year and ended 1% down on 2003 despite an unscheduled shutdown for crusher repairs. Gold production for the year amounted to 67,000 ounces, down by 8% on 2003, while the yield fell by 9% to 1.59g/t.
Total cash costs, at $348 per ounce, were 27% higher than the previous year, largely due to the weaker dollar, higher diesel prices and lower grades. Good progress was made in improving volumes, grades and efficiencies in the second half of the year. Adjusted operating profit declined to $1 million. Capital expenditure of $21 million was significantly higher than the previous year owing to the transition to owner-mining.
Growth prospects: In the short term, mining of shallow ore adjacent to the EZ3 pit will enhance growth, in the longer term a potential pit expansion to fetch footwall mineralisation is being considered. Several brownfields prospects are located within a trucking distance to the pit and are currently under investigation.
Outlook: Gold production is expected to rise to 80,000 ounces in 2005, at a total cash cost of $277 per ounce. Capital expenditure should decline by 96% to $1 million.
Namibia > Tanzania
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|Annual Report 2004|