Results reported below are from Phase 2 test work completed for the evaluation process for the flotation circuit and initial gravity separation of Tungsten. Detailed metallurgical results highlighting strong recovery rates for gold averaging 93.5% was previously announced on
- A detailed flotation test work program on a 86-kilogram, representative sulphide sample from Apollo returned commercial concentrate grades of up to 30.5% copper, 1,280 g/t silver and 28.7 g/t gold with low levels of deleterious elements (see Table 1: Locked cycle test results).
- The flotation metallurgical work demonstrates that Apollo sulphide ore with greater than 0.15% in situ copper grade is very amenable to flotation. A comprehensive series of flotation tests were undertaken under a wide range of conditions resulting in the development of commercial copper, silver and gold concentrate grades as outlined in the final locked cycle tests presented in this release.
- The lock cycle tests achieved recoveries of up to 95.3% for copper, 83.6% for silver and 79.4% for gold. There are opportunities to increase the overall gold recoveries through cyanidation of the cleaner tail residue and generation of a slightly lower copper concentrate grade. Further work will be undertaken in this regard.
- Detailed mineralogical studies of the Apollo system highlight a relatively simple copper sulphide assemblage hosting predominately chalcopyrite with lesser chalcocite, both of which are very amenable to flotation.
- Previous drilling has demonstrated a shallow zone of high-grade tungsten mineralization at Apollo hosted within scheelite (see press release dated
November 7 , 2023). Preliminary gravity test work on a 25 kg sample grading 0.44% tungsten returned a 74% recovery rate for tungsten to a concentrate of 63.6% scheelite. Additional test work will be undertaken to further upgrade the overall recovery rate for tungsten.
Table 1: Flotation Locked Cycle Test Results for Apollo
Composite 1 weighed 86.1 kilogram with a head grade of 0.62% for copper, 0.73 g/t for gold and 37.19 g/t for silver and is a representative grade profile of Apollo mineralization.
Sample | Concentrate Cu (%) | Concentrate Ag (g/t) | Concentrate Au (g/t) | Recovery Cu (%) | Recovery Ag (%) | Recovery Au (%) |
Comp | 30.5 | 1,280.0 | 27.0 | 95.0 | 80.6 | 77.0 |
Comp | 24.6 | 1,084.0 | 28.7 | 95.3 | 83.6 | 79.4 |
1. | Flotation test work was undertaken at the |
2. | The mass pull of the lock cycle concentrates was between 2% and 3% of the total weight of material. |
Previous bottle roll cyanidation test work undertaken at SGS in
Table 2: Duplicate Samples for Bottle Roll Cyanidation Comparing Results Between SGS and ALS
Sample | Gold Head Grade (g/t) | SGS Gold Dissolution (%) | ALS Gold Dissolution (%) |
APBRT 03 | 4.92 | 92.5 | 91.6 |
APBRT 07 | 11.10 | 87.5 | 89.5 |
Cyanidation work was undertaken at ALS on three representative, lower grade samples from Apollo (<0.9 g/t gold) and returned an average recovery rate of 91.2% (see Table 3). Silver dissolution is generally in the range 50% to 60%, however, the bulk of the silver is associated with the copper mineralization and will report at higher recovery rates in the flotation concentrate.
Table 3: Bottle Roll Cyanidation Results Undertaken at ALS for Low
Sample ID | Gold Head Grade (g/t) | Gold Dissolution (%) | Silver Dissolution (%) |
COMP 5 | 0.49 | 91.5 | 54.4 |
APKFR 04 | 0.86 | 92.9 | 60.5 |
CIL 4 | 0.39 | 89.1 | 63.9 |
AVERAGE | 0.58 | 91.2 | 59.6 |
To see our latest corporate presentation and related information, please visit www.collectivemining.com.
Founded by the team that developed and sold
The Company's flagship project, Guayabales, is anchored by the Apollo system, which hosts the large-scale, bulk-tonnage and high-grade copper-silver-gold-tungsten Apollo porphyry system. The Company's 2024 objectives is to expand the Apollo system, prove that the recent discoveries at the Olympus and Trap targets evolve into large scale systems and make a new discovery at either the Box, Tower, or X target.
Management, insiders and a strategic investor own nearly 50% of the outstanding shares of the Company and as a result, are fully aligned with shareholders. The Company is listed on the TSX under the trading symbol "CNL", on the OTCQX under the trading symbol "CNLMF" and on the FSE under the trading symbol "GG1".
To see our latest corporate presentation and related information, please visit www.collectivemining.com.
All samples were prepared and analyzed at
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