Macraes Mine
Macraes Mine in East Otago is New Zealand's largest gold mine,[1] owned by OceanaGold Corporation, which consists of a large scale opencast mine [2] (opened in 1990), and a newer underground mine, opened in 2008. [3] It is situated close to the settlement of Macraes Flat. Tours of the mine are available. [4]
Gold production averaged 193,000 ounces/year for 2008 through 2010. Ore grades have been declining, to 1.26 grams/tonne in 2010, but recoveries have improved slightly to 81% of the gold contained in the ore, in 2010. From 1990 through 2014, gold production has totaled about 4 million ounces. [5] The company claims a gold reserve of 1.53 MM troy oz Au plus a larger subeconomic gold resource; and expects the mine to operate at least through 2019. [3]
The gold bearing rocks were formed by the orogenic processes that created the Otago Schist belt.[6]
References
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- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 3.0 3.1 Macraes Mine at Oceana Gold
- ↑ Mine tours
- ↑ Oceana Gold Business Review, June 2011.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
External links
- Macraes Mine at Oceana Gold
Media related to Lua error in package.lua at line 80: module 'strict' not found. at Wikimedia Commons
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