The Guelb Moghrein copper-gold operation is 100% owned by Mauritanian Copper Mines (MCM), a First Quantum subsidiary. The mine is located 250 kilometres northeast of the nation’s capital, Nouakchott, near the town of Akjoujt.
The Guelb Moghrein deposit was first developed in the early 1970s by Anglo American Corporation but was closed in 1977 due to technical difficulties and high fuel prices. First Quantum acquired an 80% interest in the asset in 2004 and achieved commercial production in 2006. In 2010, the Company increased its ownership in Guelb Moghrein to 100%.
In addition to the Guelb Moghrein mining concession, First Quantum holds six exploration concessions in the area around the mine totaling 5,269 km2 of ground, and three exploration licenses in southern Mauritania.
Mining and Processing
Mining started in April 2006. Commissioning of the copper flotation plant commenced in July 2006 and commercial production began in October 2006. In October 2009, the mining rate was increased to 3.8 million tonnes of ore per year at a strip ratio of 3:1 (waste to ore). On average, sufficient ore is stockpiled for two to three month’s feed to the plant.
Mining is carried out in a single open pit using hydraulic excavators and mechanical drive haul trucks. Sulphide ore is treated in the processing plant to produce a copper-gold concentrate from the copper flotation circuit and doré bullion from the gold flotation/carbon-in-leach circuit.
The plant currently produces approximately 17,000 tonnes of concentrate per month at a grade 22.5% copper with credits received for gold in concentrate and gold in bullion.
2011 Facts and Stats
- Copper in concentrate produced (tonnes): 35,281
- Gold produced (ounces): 62,938
- Cash cost of production: $1.46 per lb of copper
- Type of mine: open pit
- Current estimated mine life: 9.5 years
- Employees:1,541
Outlook
The continued focus is on maintaining feed tonnages at design capacity. Progress has been seen in Q4 and into 2012 with steadier operations, most notably in the high pressure grinding rolls and pebble crusher circuit. The metallurgical team is focused on recoveries, particularly in the gold circuit where there are opportunities for improvement.