Huckleberry is an open pit copper mine located in west-central British Columbia. Imperial holds a 50% interest in Huckleberry Mines Ltd., owner/operator of the mine. The remaining 50% is held by the Japan Group comprised of Mitsubishi Materials Corporation, Dowa Mining Co. Ltd. and Furukawa Co.
(1) production stated 100% - Imperial's allocation is 50%
Huckleberry Annual Production(1)
|Copper - lbs||36.0 M||41,212,818||35,112,000|
|Gold - oz||2,900||2,983||2,578|
|Silver - oz||175,000||238,028||191,787|
Exploration at HuckleberryNo diamond drilling is planned for the Huckleberry Mine site or adjacent claims for the year. A limited grassroots exploration program for Huckleberry's claims is planned for 2014.
Geological SettingThe Huckleberry mine is a typical porphyry copper/molybdenum deposit. It is characterized as a calc-alkalic copper/molybdenum type mineralization. These deposits are typically hosted in intrusive rocks, usually of granodioritic or quartz monzonitic composition, and in volcanic rocks surrounding intrusives.
Huckleberry Mill InfrastructureOre from the pit is delivered to a 42"x 65" gyratory crusher and after crushing is conveyed to a stockpile. Ore from the stockpile is ground in two stages prior to flotation, firstly in a single 10,000hp semi-autogenous (SAG) mill, and secondly in two 5,000hp ball mills. A bulk copper concentrate is floated from the ball mill product. The bulk copper concentrate is then reground in a 1,500hp regrind mill, and then floated again to produce a final copper concentrate grading approximately 27% copper. Molybdenum concentrate is floated out of the copper concentrate.
Both final concentrates are thickened and dewatered prior to shipment. A Grinding Improvement Project (SAG pebble circuit) was completed by mid-2000. This circuit consists of a vibrating screen that removes critical size rocks from the SAG mill discharge conveyors then transports this material to a pebble crusher where the rocks are crushed and then returned to the SAG mill. Final copper concentrate is trucked to the Port of Stewart, British Columbia and then shipped by bulk carrier to Asia. The molybdenum concentrate is trucked to and sold in Vancouver under long term contract.
For additional information refer to the Company's Quarter Reports & Annual Information Form.
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