Quadra Announces First Quarter 2010 Production Results
VANCOUVER, BC - Quadra Mining Ltd. reported the 2010 first quarter production results from its three wholly owned mines, the Robinson Mine located in Ely, Nevada, the Carlota Mine located in Globe-Miami, Arizona and the Franke Mine located in Region II Chile. Combined production was 49.1 million pounds of copper and 26,846 ounces of gold produced for the three months ended March 31st, 2010.
In the first quarter, Robinson produced 32.0 million pounds of copper and 26,846 ounces of gold. Mining continued in both the Veteran Pit and Ruth Pit areas and due to the complex nature of the Robinson ore body, metal production varies from quarter to quarter. Additional flotation capacity, which was installed in the fourth quarter of 2009, has mitigated some of the metallurgical challenges associated with the deposit, as have contracts that were negotiated with concentrate customers to give Robinson more flexibility with respect to concentrate grade.
Carlota produced 8.2 million pounds of copper during the first quarter. Rainfall events in January upset the solution chemistry of the heap leach, and impacted the mine plan, particularly with respect to access to ore. As a result, first quarter copper production was lower than forecast. Ore deliveries resumed from the pit to the leach pad late in March upon completion of a secondary access into a new area of the ore body. Process operations continue with efforts to rebuild solution strength and deal with the high water levels within the leach pad. Assuming precipitation returns to normal levels, it is expected that copper production will slowly return to planned levels during Q2, and that increased ore grades delivered during the second half of the year will allow copper production to increase in the second half of 2010.
Franke produced a total of 8.9 million pounds of copper cathode in the quarter. As with all heap leach operations, it will take time to obtain sufficient information to fully evaluate resource and reserve performance and leach pad performance in terms of recovery and acid consumption. Analysis of cells already leached shows decreasing recovery with depth resulting in overall recovery being less than expected. Recoveries at the top of the leached cells are consistent with expectations. Changes are being made to the leach pad height, solutions flows, acid addition procedures and the leach pad area in order to improve overall recovery. In addition, leach pad recovery from some of the early leached cells indicates that processing of stockpiled material from historical mining operations may have negatively impacted copper recovery; this material is not expected to be a significant issue going forward.
Earthquakes in Chile during the quarter did not damage any facilities at Franke but the power outages interrupted production and damaged some onsite electrical equipment. These interruptions and damage have hampered the ramping up process. Repairs to the electrical system are expected to be complete by the third quarter of 2010. The reliability of pad loading systems, development of additional pad space and additional dust control in the crushing plant, are being proactively addressed to improve future performance.
Paul Blythe, President & CEO comments, "Robinson performed as planned during the first quarter as we continued to transition from Veteran to the Ruth Pit. Weather events at Carlota combined with start-up related equipment and leach recovery issues at Franke, challenged site personnel during the first quarter. We have made significant progress in dealing with the water situation at Carlota, following the one in 300 year storm event in January, as well as in planning to prepare ourselves better for similar events in the future. The start-up at Franke is still a work in progress, with the focus on adjusting leach conditions to bring recovery results in line with previous and current column testwork, and on improving stacking equipment performance. We are revising the mine plans at both Carlota and Franke with a view to addressing these issues as fast as possible."
The company's address is Suite 2414, Four Bentall Centre, 1055 Dunsmuir Street, P.O. Box 49185, Vancouver, BC V7X 1K8, 604-689-8550, fax: 604-689-8556.