Opinion on Metallurgical Work by Coffey (Tetra Tech)What will the metallurgical work do for the drill hole assay results, CUEQ, AUEQ and the 43-101 resource calculation?
1. Show a high recoverability and the inclusion of cobalt, scandium, palladium, silver and possibly nickle, rhodium ruthenium, iridium amd osmium in the CUEQ and AUEQ. Keep in mind the following;
- H035 intersected 97.9 metres (“m”) of 1.00 g/t Au Eq (0.73% Cu Eq) in a broader, 222.2 m, zone of porphyry-style mineralization that averaged 0.57 g/t Au Eq (0.41% Cu Eq).
- H035 intersected several sections with elevated Cobalt and Palladium values. Highest Cobalt values are 437 ppm over 1.00m; highest Palladium, 0.53 g/t over 3.0 m. Cobalt and Palladium are not included in Au Eq and Cu Eq calculations.
- Cobalt is present in all Lisle Zone drill holes in small but possibly important amounts. The Company has engaged a consulting metallurgist to advise of the significance of Cobalt and will now evaluate Palladium and Silver. Several sections with elevated Palladium values were found in H035, especially below 363 m depth.
- H035 is mineralized from near surface to final depth of 495 m and extends the Lisle deposit approximately 125m easterly but does not limit any dimension of the Lisle deposit. Hole H035 was abandoned at 495 m, depth, short of its intended depth of 1000m.
2. Help determine the TYPE of Scandium. "
Scandium is an element listed as a critical metal in demand for North America. It is used as a battery metal, as a lightweight and high strength alloy with aluminum, in aviation and recently in fast charging batteries and battery technology.
There are several types of scandium that are the result of different metallurgical processes. Values of scandium vary widely based on the end refined product and range from a few dollars per gram to hundreds of dollars per gram.
The metallurgical process and related criteria determine the type of scandium chemical composition and its recoverability factor. Doubleview has engaged Coffey, Tetra Tech consulting for this test work, the results of which will be announced when received.
3. "D
oubleview has engaged Coffey, a Tetra Tech Company, which is an internationally recognized metallurgical engineering firm, to conduct further research into the feasibility of adding value to its HAT Project mineralization through the recovery of essential metals. A drill core assay review of the HAT deposit indicates significantly elevated concentrations of Scandium, which will be evaluated in follow up metallurgical test work.
In addition, further tests will be directed at the optimisation of flotation performance and improving Cu, Co and Au selectivity, grades and recovery with a focus on improving Pd recovery to copper concentrate. The test work will also evaluate the potential concentration and recoverability of Scandium from flotation tailings products.
Nickel sulphide fusion and INAA analysis on the test work composite sample and selected flotation products also indicated the presence of Rhodium (Rh), Ruthenium (Ru), Iridium (Ir) and Osmium (Os) at elevated levels. Further analysis of these metals will be undertaken on selected samples during planned test work programs.
Farshad Shirvani, President and CEO states: “The rapidly evolving world of alternative energy increasingly demands a new generation of batteries that efficiently provide, among other features, greater storage capacity, faster re-charge, lighter weight, and longer service life. “New Age” batteries inevitably require large quantities of certain metals that are costly and in short supply, including scandium, cobalt, nickel, lithium and rare earths. The metallurgical industry is currently being challenged to be innovative in recovery methods and helping source new supplies.”"
4. https://www.doubleview.ca/scandium-2022-04-26-news/
5. https://www.doubleview.ca/detailed-mineralogical-study-of-scandium/
6. https://www.doubleview.ca/doubleview-announces-commissioning-of-ore-sorting-assessments/
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I believe that the metallurgy, drill/assay results and resource calculation will lead to 1.4% to 2.8% CUEQ. Do your DD and read carefully all the above. GLTA.