OUTCROP SILVER ACHIEVES EXCEPTIONAL RECOVERY OF 96.3% SILVER AND 98.5% GOLD IN UPDATED METALLURGICAL TESTING AT SANTA ANA
Key Highlights:
- High-Efficiency Recovery: The integrated gravimetric and flotation test work resulted in an overall recovery of 96.3% for silver and 98.5% for gold, setting a new benchmark for the project.
- Initial Gravimetric Concentration: The gravimetric process alone recovered 7.6% of silver and 35.8% of gold, with the gravimetric concentrate assaying at 2,883 g/t silver and 164 g/t gold.
- Subsequent Flotation Recovery: Flotation of gravimetric tails recovered and additional 88.6% of the remaining silver and 62.7% of the remaining gold, with rougher concentrate grades reaching 4,356 g/t silver and 37.5 g/t gold.
- Unique Mineralogy: The process highlights the project's distinctive mineral composition where 88% of the silver is in the form of argentite—a silver sulfide which is amenable to flotation, enhancing recoverability and high-grade concentrates.
"The exceptional recoveries of both silver and gold at the Santa Ana project, achieved through environmentally conscious methods, underscore the uniqueness of Santa Ana as one of the world's highest-grade undeveloped primary silver deposits. Our ability to achieve incredible recovery rates and produce high-grade concentrates demonstrates the project's efficiency in extracting significant value from the ground," comments
Sample Preparation and Previous tests
Outcrop Silver commenced its metallurgical test program by preparing four core sample composites using coarse laboratory rejects (see news release dated
Gravimetric Concentration Tests
The gravimetric concentration tests on the PAR-02 sample from Paraiso vein were performed at SGS Metallurgical Services Peru utilizing a Falcon Gravity Concentrator, resulting in recovery rates of 30.52% for gold and 7.3% for silver (see News Release dated
Sequential Gravimetric and Flotation Concentration Tests
The conventional open cycle flotation was applied to the general tails from the gravimetric concentration test following the conditions from the previous flotation tests (see News Release dated
The Rougher flotation concentrate returned grades of 4,357 grams per tonne of silver and 37.47 grams per tonne of gold for 88.64% and 62.74% recoveries, respectively (Table 2). Together with the gravimetric concentration results, the current test work achieved a remarkable global recovery of 96.28% for silver and 98.52% for gold (Table 1), confirming Outcrop Silver's goal of maximizing metallurgical recoveries by combining physical methods on the mineralized material from Santa Ana project.
|
|
|
Grades |
Recoveries |
||||||
Product |
Mass |
Ag |
Au |
Fe |
S |
Ag |
Au |
Fe |
S |
|
Gravimetric Conc. |
1.31 |
2,883 |
164.12 |
16.66 |
17.60 |
7.64 |
35.79 |
3.26 |
6.30 |
|
Rougher Conc. |
10.04 |
4,357 |
37.47 |
26.48 |
31.69 |
88.64 |
62.74 |
39.80 |
87.14 |
|
Global |
11.35 |
4,187 |
52.07 |
25.35 |
30.07 |
96.28 |
98.52 |
43.06 |
93.45 |
|
Tails |
88.65 |
21 |
0.10 |
4.29 |
0.27 |
3.72 |
1.48 |
56.94 |
6.55 |
|
Calculated Head |
100.00 |
494 |
6.00 |
6.68 |
3.65 |
100.00 |
100.00 |
100.00 |
100.00 |
|
Assayed Head |
|
539 |
6.67 |
6.94 |
3.52 |
|
|
|
|
Table 1. Summary of Global Metallurgical Balance. |
Product |
Mass |
Grades |
Recoveries |
||||||
Ag |
Au |
Fe |
S |
Ag |
Au |
Fe |
S |
||
Gravimetric Concentrate |
1.31 |
2883 |
164.12 |
16.66 |
17.60 |
7.64 |
35.79 |
3.26 |
6.30 |
Gravimetric tails |
98.69 |
486 |
4.41 |
6.72 |
3.39 |
92.36 |
64.21 |
96.74 |
93.70 |
Rougher Concentrate |
10.04 |
4357 |
37.47 |
26.48 |
31.69 |
88.64 |
62.74 |
39.80 |
87.14 |
Cleaner Concentrate III |
3.49 |
8590 |
82.54 |
37.98 |
50.04 |
60.75 |
48.03 |
19.84 |
47.83 |
Medium III |
1.81 |
5139 |
40.03 |
35.72 |
47.89 |
18.86 |
12.08 |
9.68 |
23.75 |
Medium II |
0.89 |
1427 |
5.97 |
19.59 |
20.04 |
2.58 |
0.89 |
2.62 |
4.90 |
Scavenger Concentrate |
0.77 |
2465 |
6.60 |
26.19 |
28.67 |
3.83 |
0.84 |
3.00 |
6.02 |
Scavenger tails |
3.08 |
421 |
1.73 |
10.10 |
5.51 |
2.63 |
0.89 |
4.66 |
4.65 |
General Tails |
88.65 |
21 |
0.10 |
4.29 |
0.27 |
3.72 |
1.48 |
56.94 |
6.55 |
Calculated Head |
100.00 |
494 |
6.00 |
6.68 |
3.65 |
100.00 |
100.00 |
100.00 |
100.00 |
Assayed Head |
|
539 |
6.67 |
6.94 |
3.52 |
|
|
|
|
Table 2. Summary of Global Metallurgical Balance. |
The 100% owned 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 aims to extend known mineralization and test new high-potential areas along the project's extensive 30 kilometres of strike. These efforts underscore the scalability of Santa Ana and its potential for substantial resource growth, positioning the project to develop into a high-grade, economically viable, and environmentally responsible silver mine.
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
+1 604 638 2545
harris@outcropsilver.com
www.outcropsilver.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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