News on Eaglehead.....written in a language that 99% of the market wouldn't understand, basically saying that they are pleased that an additional work-plan will be figured out there for the remainder of 2015....just when you thought we were going to pull the plug and conserve cash, they reel us back in for more testing of test samples etc etc. Same story, different year.
April 15, 2015
Copper Fox Announces Preliminary Results of Metallurgical Testwork from Eaglehead Copper Project
VANCOUVER, BRITISH COLUMBIA--(Marketwired - April 15, 2015) - Copper Fox Metals Inc. ("Copper Fox" or the "Company") (TSX VENTURE:CUU) and its wholly owned subsidiary Northern Fox Copper Inc. ("Northern Fox") are pleased to announce the results of the preliminary metallurgical testwork for Carmax Mining Corp's ("Carmax") Eaglehead copper-gold-molybdenum project located in northwest British Columbia. Northern Fox holds 42.09% of the equity of Carmax. The preliminary testwork was completed by SGS Mineral Services ("SGS").
Highlights:
Three composite samples each representing a different copper grade (0.11%, 0.23% and 0.40%) and a master composite (0.26% copper) were subjected to characterization and open circuit flotation testwork. A total of 10 tests were completed. All the copper is present as copper sulphides, primarily as chalcopyrite and bornite. Six rougher kinetic tests achieved copper recoveries of 92.4% to 97.6%. Potential copper recoveries to the first cleaner test ranged from 89.8% in composite - 1 to 95.5% in composite - 3 with 92.2% recovery in the master composite. Copper recoveries in the third cleaner concentrate ranged from 77.1% to 92.7% with the corresponding concentrate containing between 21.1% and 37.9% copper. The potential metal content of the third cleaner concentrate are 11.8 g/t gold, 96 g/t silver and 0.816% molybdenum with low concentrations of arsenic, selenium and tin. Metal recoveries in the third cleaner concentrate ranged from 65-87% for gold, 71-80% for silver and 17-55% for molybdenum. The testwork suggests that the overall molybdenum recovery may improve in closed circuit testing (locked cycle tests). Tests to upgrade molybdenum recovery in a separate molybdenum cleaner circuit were not completed. Elmer B. Stewart, President of Copper Fox stated, "We are very pleased with the preliminary characterization testwork on the mineralization from the Eaglehead project, particularly with the percentage copper recovery in the low grade sample. The purpose of this work was to determine the preliminary metallurgical characteristics of the mineralization from the Eaglehead project. The positive results from these tests indicate that a significant amount of the copper can be recovered from the mineralization into clean concentrates with good copper grades containing significant by-product credits. With these results in hand, we will work with Carmax to plan a program to be completed in 2015. Additional testwork when completed would include a more detailed and comprehensive testing program as well as preparation of a separate molybdenum concentrate and a significant number of locked cycle tests."
The following Table shows the head assay for the Master Composite and the three Composite samples tested.
| Sample ID | copper (%) | gold (g/t) | molybdenum (%) | silver (g/t) | | Master Composite | 0.26 | 0.10 | 0.012 | 0.80 | | Composite - 1 | 0.11 | 0.03 | <0.001 | 0.30 | | Composite - 2 | 0.23 | 0.11 | 0.009 | 0.80 | | Composite - 3 | 0.40 | 0.15 | 0.026 | 1.30 |
Recommendations:
SGS has made the following recommendations for further testwork on the copper mineralization from the Eaglehead project:
Further optimization of the rougher and cleaner stages to establish an optimal flowsheet. Further testing with primary grind sizes of K80 = 200 - 300 µm to understand the impact of coarser grinds. Locked cycle testing once optimization is complete, to provide robust metallurgical projections for economic evaluations. A geo-statistical evaluation of the representation of the samples selected for testing in context of the overall geochemical model. The samples used in the testwork were collected from drill core from the Eaglehead copper-molybdenum-gold deposit. Three grade classes were selected for testing and each grade class is designated Composite-1, Composite-2 and Composite-3. The Master Composite was blended from an equal amount from each Composite sample. Each composite was blended and rotary split into 2 kilogram representative sub-samples for the testwork. A total of 10 samples were prepared for testing. The testwork (rougher and cleaner tests on each sample) consisted of six tests on the master composite and four tests on the composite samples. The rougher kinetic tests on the master composite were used to determine the effect of grind size on flotation performance at grinding sizes ranging from K80 = 88-181 microns. Based on the results of this work, a grind size of K80 = 100 microns was selected as the optimal for the remainder of the testwork. The cleaner tests on the master composite achieved copper recoveries ranging from 94.4% to 95.9%. The rougher performance of the cleaner tests was similar to the rougher kinetic tests. The cleaner tests on the composite samples achieved similar copper recoveries and grades as the rougher stage of the tests.
About The Eaglehead Project
The Eaglehead property hosts an NI 43-101 Inferred Mineral Resource estimated to total 102.5 million tonnes at an average grade of 0.29% Cu, 0.010% Mo and 0.08 g/t Au. The NI-43-101 Technical Report was prepared by RPA Inc. (see Carmax news release dated May 16, 2012), by Barry McDonough, P.Geo., and David W. Rennie, P.Eng., both Qualified Persons. The mineral resource was estimated at a cut-off grade of 0.16% CuEq, to contain approximately 662 million pounds copper, 22 million pounds molybdenum, and 265,000 ounces gold. The mineral resource is contained within two conceptual open pits covering the East and Bornite zones. The CuEq used in the RPA Inc. Technical Report was derived using metal prices of US$3.50/lb Cu, US$17/lb Mo, and US$1,500/oz. Au. Metallurgical and payable recoveries were assumed to be 80% for base metals and 67% for precious metals. |
