Highlights
- Gravimetric concentration test successfully confirmed the recovery of silver from mineralized material at Santa Ana before the conventional flotation processing.
- The resulting silver and gold gravimetric concentrate yielded 2,883 grams per tonne of silver and 164.12 grams per tonne of gold.
"We are thrilled about the latest gravimetric concentration tests having not only achieved concentrate grades well exceeding 150 gold equivalent grams per tonne — a key marker for highly marketable concentrates — but have also demonstrated significant potential for enhancing our overall recovery rates. With a 7% recovery via gravimetric methods complementing our 93% flotation recoveries, and without the use of cyanide, we are setting new benchmarks for economic viability and reducing our environmental footprint in precious metals mining," comments
"Our exceptional flotation recoveries can largely be attributed to the predominance of argentite, a silver sulfide, within the mineral composition at Santa Ana. However, the presence of significant components of native silver and electrum also plays a critical role," explains
Sample Preparation and Initial Tests:
Outcrop Silver has advanced its metallurgical test work by preparing four core sample composites using coarse laboratory rejects (see news release dated
Locked Cycle Flotation Tests:
The results of the final locked cycle flotation metallurgical balance for sample PAR-02 demonstrated exceptional recovery rate, achieving 97.14% for gold and 92.85% for silver (Table 1), This process produced a high-grade concentrate grading of 128.74 grams per tonne of gold and 9,488 grams per tonne of silver (see News Release dated
Grades | Recoveries % | ||||||||
Product | Mass % | Ag g/t | Au g/t | Fe % | S % | Ag | Au | Fe | S |
Final Concentrate | 5.17 | 9,488 | 128.74 | 35.36 | 46.75 | 92.85 | 97.14 | 31.89 | 74.83 |
Tails | 94.83 | 40 | 0.21 | 4.12 | 0.86 | 7.15 | 2.86 | 68.11 | 25.17 |
Calculated Head | 100.00 | 512 | 6.30 | 6.02 | 3.54 | 100.00 | 100.00 | 100.00 | 100.00 |
Assayed Head | 539 | 6.14 | 7.27 | 3.81 |
Table 1. Summary of Flotation Concentration Metallurgical Balance (News Release |
Gravimetric Concentration Tests:
The latest phase of metallurgical work involved conducting gravimetric concentration tests on the PAR-02 sample from the Paraiso vein as part of our continued efforts to enhance overall metal recoveries at Santa Ana. These tests were performed at SGS Metallurgical Services Peru utilizing a Falcon Gravity Concentrator. The resulting gravimetric concentrate demonstrated high grades and recoveries, with gold assaying at 164.12 g/t and achieving a recovery rate of 30.52%. Additionally, silver assayed 2,883 g/t with a recovery of 7.3%, while the sulfur recovery was 6.44%. These results indicate the concentration of native silver and electrum, highlighting the potential to improve the metallurgical efficiency of the Santa Ana project.
Tails from the gravimetric concentration test will be processed further using conventional flotation, accounting for 92.7% of silver and 69.48% of gold. The mineralogical characterization from Santa Ana has revealed that 88% of the silver is present as argentite, a silver sulfide (refer to News Release dated
Grades | Recovery % | ||||||
Product | Mass % | Au g/t | Ag g/t | S % | Au | Ag | S |
Gravimetric | 1.31 | 164.12 | 2,883 | 17.60 | 30.52 | 7.30 | 6.44 |
Tails | 98.69 | 4.95 | 486 | 3.39 | 69.48 | 92.70 | 93.56 |
Calculated Head | 7.03 | 517 | 3.58 | ||||
Assayed Head | 6.67 | 539 | 3.52 |
Table 2. Summary of Gravimetric Concentration Metallurgical Balance. |
The Santa Ana project covers 27,000 hectares within the
Santa Ana's maiden resource estimate, detailed in the NI 43-101 Technical Report titled "Santa Ana Property Mineral Resource Estimate," dated
The 2024 drilling campaign is a pivotal initiative to not only amplify resource mineralization on established veins but also explore new prospects along the project's extensive 18.5-kilometer strike that is drill permitted. This campaign is designed to extend mineralization along strike and down dip at key targets like
Outcrop Silver is a leading explorer and developer focused on advancing its flagship Santa Ana high-grade silver project in
At the core of our operations is a commitment to responsible mining practices and community engagement, underscoring our approach to sustainable development. Our expertise in navigating complex geological and market conditions enables us to consistently identify and capitalize on opportunities to enhance shareholder value. With a deep understanding of the Colombian mining landscape and a track record of successful exploration, Outcrop Silver is poised to transform the Santa Ana project into a significant silver producer, contributing positively to the local economy and setting new standards in the mining industry.
Chief Executive Officer
+1 604 294 9039
harris@outcropsilver.com
www.outcropsilverandgold.com
Vice President of Investor Relations
+1 778 783 2818
li@outcropsilver.com
Neither the
Certain information contained herein constitutes "forward-looking information" under Canadian securities legislation. Generally, forward-looking information can be identified by the use of forward-looking terminology such as "potential," "we believe," or variations of such words and phrases or statements that certain actions, events or results "will" occur. Forward-looking statements are based on the opinions and estimates of management as of the date such statements are made and they are subject to known and unknown risks, uncertainties and other factors that may cause the actual results, level of activity, performance or achievements of Outcrop to be materially different from those expressed or implied by such forward-looking statements or forward-looking information, including: the receipt of all necessary regulatory approvals, capital expenditures and other costs, financing and additional capital requirements, completion of due diligence, general economic, market and business conditions, new legislation, uncertainties resulting from potential delays or changes in plans, political uncertainties, and the state of the securities markets generally. Although management of Outcrop have attempted to identify important factors that could cause actual results to differ materially from those contained in forward-looking statements or forward-looking information, there may be other factors that cause results not to be as anticipated, estimated or intended. There can be no assurance that such statements will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Accordingly, readers should not place undue reliance on forward-looking statements and forward-looking information. Outcrop will not update any forward-looking statements or forward-looking information that are incorporated by reference
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