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25.10.2021 07:45
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Great Bear Reports 95.2% to 99.2% Gold Recoveries in Preliminary LP Fault Metallurgical Tests - Gold is Free Milling and Readily Soluble at All Grades
Gestapelte Goldbarren.
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PR Newswire
VANCOUVER, BC, Oct. 25, 2021
TSX-V: GBR
VANCOUVER, BC, Oct. 25, 2021 /PRNewswire/ - Great Bear Resources Ltd. (the "Company" or "Great Bear"), (TSXV: GBR) (OTCQX: GTBAF) today reported gold recovery test results from its 100% owned flagship Dixie Project, in the Red Lake district of Ontario.
Chris Taylor, President and CEO of Great Bear said, "We selected what were anticipated to be the 'most difficult' mineralized domains to extract gold from at the LP Fault, and are pleased to report very high gold recoveries at all grades. This has strong positive implications for the future development potential of the Dixie project. Similar very high gold recoveries from the Dixie Limb and Hinge zones using comparable grinding and cyanidation protocols indicates mineralized material from all gold zones is likely amenable to processing through the same extraction circuits. Initial LP Fault cyanidation gold recovery tests confirm that non-refractory, free gold dominates all low to high-grade domains tested to-date. All Dixie gold zones have excellent potential for significant gravity circuit gold recoveries, which will be investigated in the next phase of metallurgical testing."
Highlights of Gold Recovery Results
Ten one kilogram representative samples were analyzed at Blue Coast Research Ltd. ("Blue Coast") of Parksville, British Columbia (Table 1). Samples were composited from 10 to 13 metre long core intervals and were processed through a standard 48 hour bottle roll procedure at 40% solids, using a 1.0 g/L sodium cyanide solution.
- All tested combinations of grades, host rocks, sulphide content and alteration styles recovered a very high percentage of total gold, within a four percent range from 95.2% to 99.2%. While high-grade gold samples recovered the highest percentage of total gold during cyanidation, sub-gram low-grade gold mineralization nonetheless achieved excellent recoveries of greater than 95 percent. Table 2 and Figure 1.
- LP Fault gold mineralization is not refractory. All samples, regardless of grade, were described as "free-milling", indicating gold is not encapsulated in sulphide accessory minerals. Free gold mineralization has repeatedly been observed and reported by Great Bear, including during petrographic/microscope analysis (see news release of September 22, 2020).
Table 1: Metallurgical sample descriptions.
| Test ID | Grade (Au g/t) | Total | Core (m) | Comments |
| CN21,22 | 0.50 – 1.0 | 19.62 | 12.30 | Lower-grade bulk tonnage halo, felsic volcanic with |
| CN19,20 | 1.3 – 1.6 | 19.86 | 10.10 | Bulk tonnage halo, felsic volcanic/metasediment, < 2% |
| CN17,18 | 4.1 – 4.2 | 21.26 | 10.65 | Transitional mid-grade mineralization proximal to |
| CN13,14 | 9.2 | 21.46 | 13.00 | High-grade from the Auro2 domain which includes the |
| CN15,16 | > 20.0 | 21.28 | 11.85 | High-grade from the Auro2 domain, felsic volcanic. |
Table 2: Gold recovery results from LP Fault composite samples.
| Test ID | Purpose | NaCN | % | Primary | NaCN | 48 hr Au | Residue | Calculated |
| CN-13 | Baseline | 1 | 40 | 77 | 0.19 | 98.0 | 0.18 | 9.24 |
| CN-14 | Lead Nitrate | 1 | 40 | 75 | 0.22 | 97.7 | 0.21 | 9.23 |
| CN-15 | Baseline | 1 | 40 | 75 | 0.23 | 99.2 | 0.19 | 22.98 |
| CN-16 | Lead Nitrate | 1 | 40 | 74 | 0.27 | 98.7 | 0.34 | 26.58 |
| CN-17 | Baseline | 1 | 40 | 75 | 0.18 | 97.5 | 0.11 | 4.19 |
| CN-18 | Lead Nitrate | 1 | 40 | 74 Werbung Mehr Nachrichten zur New Concept Energy Aktie kostenlos abonnieren
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