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Collective Mining Reports High Recovery Rates for Gold at Apollo Averaging 94.3% From New Variability Metallurgical Test Work

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Collective Mining (NYSE: CNL) (TSX: CNL) has announced positive results from recent metallurgical tests on samples from its Apollo system at the Guayabales Project in Colombia. New cyanidation tests yielded an average gold dissolution of 94.3% from seven variability samples, confirming previously reported high recovery rates. The company also reported improved recoveries for gold (89.4%) and silver (85.2%) from optimization test work on a flotation concentrate.

The company envisions a conventional split circuit for processing, with copper-rich material treated through flotation and copper-poor material through cyanidation to produce doré. A gravity circuit is expected to be included for high-grade tungsten recovery. Collective Mining currently has five diamond drill rigs in operation as part of its fully funded 40,000-metre drill program for 2024.

Collective Mining (NYSE: CNL) (TSX: CNL) ha annunciato risultati positivi dai recenti test metallurgici su campioni del suo sistema Apollo nel progetto Guayabales in Colombia. I nuovi test di cianurazione hanno mostrato una dissoluzione media dell'oro del 94.3% su sette campioni di variabilità, confermando le elevate percentuali di recupero precedentemente riportate. L'azienda ha anche segnalato recuperi migliorati per l'oro (89.4%) e l'argento (85.2%) grazie a lavori di ottimizzazione su un concentrato di flottazione.

L'azienda prevede un circuito di lavorazione convenzionale a flusso diviso, con materiale ricco di rame trattato tramite flottazione e materiale povero di rame tramite cianurazione per produrre doré. Si prevede inoltre l'inclusione di un circuito di gravità per il recupero di tungsteno ad alta grado. Collective Mining attualmente ha cinque perforatrici a diamante in operazione come parte del suo programma di perforazione completamente finanziato di 40.000 metri per il 2024.

Collective Mining (NYSE: CNL) (TSX: CNL) ha anunciado resultados positivos de recientes pruebas metalúrgicas sobre muestras de su sistema Apollo en el proyecto Guayabales en Colombia. Las nuevas pruebas de cianuración arrojaron una disolución promedio de oro del 94.3% de siete muestras de variabilidad, confirmando las altas tasas de recuperación reportadas anteriormente. La compañía también informó recuperaciones mejoradas de oro (89.4%) y plata (85.2%) de trabajos de optimización en un concentrado de flotación.

La compañía prevé un circuito convencional dividido para el procesamiento, con material rico en cobre tratado a través de flotación y material pobre en cobre a través de cianuración para producir doré. Se espera que se incluya un circuito de gravedad para la recuperación de tungsteno de alta ley. Collective Mining actualmente tiene cinco perforadoras diamantinas en operación como parte de su programa de perforación completamente financiado de 40,000 metros para 2024.

Collective Mining (NYSE: CNL) (TSX: CNL)은 콜롬비아의 Guayabales 프로젝트에 있는 Apollo 시스템 샘플에 대한 최근의 메탈 루지 시험에서 긍정적인 결과를 발표했습니다. 새로운 시안화 시험에서는 7개의 변동 샘플에서 평균 금 용출률이 94.3%로 나타났습니다, 이전에 보고된 높은 회수율을 확인했습니다. 회사는 또한 금(89.4%)과 은(85.2%)의 회수율 향상을 보고했습니다. 이들은 플로타이션 농축물의 최적화 시험 작업을 통해 얻어진 것입니다.

회사는 처리를 위한 전통적인 분할 회로를 구상하고 있으며, 구리 함량이 높은 소재는 플로타이션을 통해, 구리 함량이 낮은 소재는 시안화를 통해 황금 덩어리를 생산하는 방식으로 처리될 것입니다. 고품질 텅스텐 회수를 위한 중력 회로가 포함될 것으로 예상됩니다. Collective Mining은 현재 2024년 40,000미터 시추 프로그램의 일환으로 다이아몬드 시추기를 5대 운영 중입니다.

Collective Mining (NYSE: CNL) (TSX: CNL) a annoncé des résultats positifs suite à des tests métallurgiques récents sur des échantillons de son système Apollo dans le projet Guayabales en Colombie. Les nouveaux tests de cyanuration ont donné un taux moyen de dissolution de l'or de 94,3% sur sept échantillons de variabilité, confirmant les taux de récupération élevés précédemment rapportés. L'entreprise a également signalé des récupérations améliorées pour l'or (89,4%) et l'argent (85,2%) lors des travaux d'optimisation sur un concentré de flottation.

L'entreprise envisage un circuit de traitement conventionnel à circuit divisé, avec les matériaux riches en cuivre traités par flottation et les matériaux pauvres en cuivre par cyanuration pour produire du doré. Un circuit de gravité devrait également être inclus pour la récupération du tungstène de haute qualité. Collective Mining dispose actuellement de cinq foreuses à diamant en opération dans le cadre de son programme de forage entièrement financé de 40 000 mètres pour 2024.

Collective Mining (NYSE: CNL) (TSX: CNL) hat positive Ergebnisse aus kürzlichen metallurgischen Tests von Proben aus seinem Apollo-System im Guayabales-Projekt in Kolumbien bekannt gegeben. Neue Cyanidationstests ergaben eine durchschnittliche Goldlösung von 94,3% aus sieben Variabilitätsproben und bestätigten zuvor berichtete hohe Rückgewinnungsraten. Das Unternehmen berichtete auch von verbesserten Rückgewinnungen für Gold (89,4%) und Silber (85,2%) aus Optimierungstests an einem Flotationskonzentrat.

Das Unternehmen plant einen herkömmlichen Split-Zyklus zur Verarbeitung, bei dem kupferhaltiges Material durch Flotation und kupferarmes Material durch Cyanidation behandelt wird, um Doré zu produzieren. Ein Schwerkraftkreislauf wird für die hochgradige Tungsten-Rückgewinnung vorgesehen. Collective Mining hat derzeit fünf Diamantbohrgeräte im Einsatz als Teil seines vollständig finanzierten Bohrprogramms von 40.000 Metern für 2024.

Positive
  • High average gold dissolution of 94.3% from new cyanidation tests
  • Improved recoveries for gold (89.4%) and silver (85.2%) from flotation concentrate optimization
  • Confirmation of high copper recovery (94.4%) in copper-rich material
  • Fully funded 40,000-metre drill program for 2024 with five rigs in operation
Negative
  • None.

Insights

The metallurgical test results for Collective Mining's Apollo system are highly positive for the company's prospects. The average gold dissolution rate of 94.3% from cyanidation tests is excellent, indicating efficient gold extraction potential. This high recovery rate could significantly enhance the project's economics.

The improved overall recoveries for gold (89.4%) and silver (85.2%) in the flotation circuit, up from previous results, are also noteworthy. These improvements could translate to increased revenue potential per ton of ore processed.

The confirmation of high recovery rates using conventional technologies suggests lower capital and operational costs for future mining operations. This could positively impact the project's feasibility and potential return on investment.

For investors, these results strengthen the Apollo project's viability and Collective Mining's position in the precious metals sector. However, it's important to note that further studies and economic assessments will be needed to fully understand the project's potential value.

The metallurgical test results demonstrate the Apollo system's amenability to efficient mineral processing. The high gold recovery rates across various samples, including lower grade material, indicate robust and consistent mineralization throughout the deposit. This bodes well for potential future mining operations.

The success of the split circuit approach - using flotation for copper-rich ore and cyanidation for copper-poor ore - showcases the versatility of the processing options. This flexibility could allow for optimized metal recovery and potentially reduce operational complexities.

The addition of a gravity circuit for tungsten recovery adds another valuable component to the project. Tungsten's classification as a critical mineral in many jurisdictions could provide an additional revenue stream and strategic importance to the project.

The comprehensive nature of these tests, covering various mineralization types and processing methods, provides a solid foundation for future feasibility studies and mine planning. This thorough approach reduces technical risks associated with mineral processing in the project's development stages.

TORONTO, Oct. 3, 2024 /PRNewswire/ - Collective Mining Ltd. (NYSE: CNL) (TSX: CNL) ("Collective" or the "Company") is pleased to announce results from recent cyanidation tests conducted on representative samples from both shallow and deeper areas of its Apollo system ("Apollo") at the Guayabales Project in Caldas, Colombia. The test results have yielded an average gold dissolution of 94.3% from seven new variability samples and confirm and corroborate previously announced cyanidation gold recoveries (see press release dated October 17, 2023). Furthermore, optimization test work on a flotation concentrate returned substantial improvements in recoveries for gold and silver over those previously reported on April 11, 2024.

As a reminder, based on previous work completed, the Company envisions a conventional split circuit for processing material from Apollo with the copper rich stream (more than 0.15% copper) being treated through a flotation circuit and the copper poor stream (less than 0.15% copper) being treated through a precious metal focused cyanidation circuit to produce doré. The Company also now expects that a gravity circuit will be included after flotation for recovery of the high-grade tungsten mineralization.

The Company has five diamond drill rigs in operation as part of its fully funded 40,000 metres drill program for 2024, with two rigs drilling at Apollo, two rigs drilling at the Trap system and one rig drilling at the Plutus Target.

Ari Sussman, Executive Chairman commented: "The comprehensive metallurgical test work completed on Apollo confirms the simple nature of achieving high recovery rates of valuable metals from the system using conventional technologies."

Details

Table 1: New Cyanidation Bottle Roll Leaching Variability Test Work Results

Seven variability samples with representative copper poor sulfide mineralization distributed across the Apollo system:

Variability
Sample

Head Grade

Dissolution

Au, g/t

Ag, g/t

%Cu

Gold
%

Silver
%

BAM002

1.28

6.77

0.03

95.7

62.1

BAM003

1.22

43.19

0.12

92.9

73.8

BAM004

1.52

5.76

0.02

94.2

67.4

BAM005

0.39

6.44

0.02

95.0

54.4

BAM006

1.12

11.27

0.04

90.5

69.3

BAM007

0.39

3.96

0.01

95.0

61.7

BAM008

1.10

4.72

0.01

96.8

57.4

Average

1.00

11.73

0.03

94.3

63.7

  • New cyanidation variability tests undertaken in SGS Lima, Peru returned average gold and silver recoveries of 94.3% and 63.7%, respectively. The seven samples are widely distributed throughout both shallow and deeper portions of Apollo and are representative of the copper poor, sulfide material planned to be treated through a cyanidation circuit to produce doré. The samples were specifically selected to reflect lower grades (average 1.0 g/t Au and 11.7 g/t Ag, see Table 1) than previously tested. The results corroborate previous cyanidation test work recoveries (see press release dated October 17, 2023) and confirm the amenability of material from Apollo to yield high dissolution of gold over a wide range of grades.

Table 2: The Locked Cycle Cleaner Tailing Cyanidation Bottle Roll Leach Test Work Results

The composite with representative grade profile of copper-rich mineralization from Apollo, weighed 20 kilograms and was floated in a Locked Cycle Test to produce 600 grams of cleaner tailings which were subsequently subjected to cyanidation at ALS Laboratories in Kamloops, Canada. The overall flotation recovery rates and grades are presented below:

Bulk Flotation Test

Additional Recovery
from Cyanidation of
Cleaner Tailings

Overall
Recoveries


Grade

Recovery

Copper

21.3 %

94.4 %

-

94.4 %

Gold

49.4 g/t

84.3 %

5 %

89.4 %

Silver

961 g/t

82.7 %

3 %

85.2 %

  • Results confirm a significant improvement of the overall gold and silver recoveries to 89.4% and 85.2% respectively when compared to previous recoveries of 84.3% Au and 82.7% Ag (see press release dated April 11, 2024). These results demonstrate significant improvements in metal recovery of approximately 5% for gold and 3% for silver while maintaining copper recovery at 94% in the copper rich material to be treated through a flotation circuit.

  • The results announced in this press release and those previously announced in the cyanidation and flotation press releases complete a comprehensive metallurgical test work program resulting in optimization of recoveries for the gold, silver, copper and tungsten in the Apollo system. These studies can now be utilized to outline an initial process design and assist in optimizing conditions for cyanidation and flotation facilities with respect to copper rich and copper poor streams.

About Collective Mining Ltd.

To see our latest corporate presentation and related information, please visit www.collectivemining.com

Founded by the team that developed and sold Continental Gold Inc. to Zijin Mining for approximately $2 billion in enterprise value, Collective is a copper, silver, gold and tungsten exploration company with projects in Caldas, Colombia. The Company has options to acquire 100% interests in two projects located directly within an established mining camp with ten fully permitted and operating mines.

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 objective is to expand the Apollo system, step out along strike to expand the recently discovered Trap system and make a new discovery at either the Tower, X or Plutus targets.

Management, insiders, a strategic investor and close family and friends 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 NYSE under the trading symbol "CNL", on the TSX under the trading symbol "CNL" and on the FSE under the trading symbol "GG1".

Qualified Person (QP) and NI43-101 Disclosure

John Wells is the designated Qualified Person for this news release within the meaning of National Instrument 43-101 ("NI 43-101") and has reviewed and verified that the technical information contained herein is accurate and approves of the written disclosure of same. Mr Wells is a graduate of the Royal School of Mines in the UK, has over 50 years of experience in mineral processing and is a Fellow of the SAIMM (South African Institute of Mines and Metallurgy) and is a member of CIM (Canadian Institute of Mining and Metallurgy).

Technical Information

The Cyanidation Bottle Roll Leaching Variability samples were prepared and analyzed at the SGS facilities in Callao, Peru. The composites were produced from the remaining half drill core taken over different lengths of seven drillholes completed at Apollo. Leaching kinetics were conducted in bottles on laboratory rolls for 72 hours. 60μm feeds and 1000 ppm NaCN, 10.5 – 11.0 pH and 40% Solids. Bottle rolling was suspended briefly after 6, 12, 24, 48, and 72 hours and slurry samples were taken and filtered to collect pregnant solution for gold, silver and copper analyzes. SGS conforms to the requirements of ISO/IEC 17025, the global benchmark for laboratory quality management systems and ensures competent and valid outcomes to facilitate trust in these results.

The Locked Cycle Cleaner Tailing Cyanidation Bottle Roll Leach sample was prepared and analyzed at ALS Canada Ltd.'s Kamloops facilities in British Colombia, Canada. The composite was produced from the remaining half drill core taken over different lengths of four drillholes completed at Apollo. 21-23μm feeds and 1000 ppm NaCN, 11.0 pH and 20-24% Solids and O2 sparged. Bottle rolling was suspended briefly after 2, 6, 24, and 48 hours and slurry samples were taken and filtered to collect pregnant solution for gold and silver analyzes. ALS conforms to the requirements of ISO/IEC 17025 and is accredited by the Standards Council of Canada for the specific tests undertaken.

Information Contact:
Follow Executive Chairman Ari Sussman (@Ariski73) on X

Follow Collective Mining (@CollectiveMini1) on X, (Collective Mining) on LinkedIn, and (@collectivemining) on Instagram

FORWARD-LOOKING STATEMENTS 

This news release contains "forward-looking statements" and "forward-looking information" within the meaning of applicable securities legislation (collectively, "forward-looking statements"). All statements, other than statements of historical fact, are forward-looking statements and are based on expectations, estimates and projections as at the date of this news release. Any statement that involves discussion with respect to predictions, expectations, beliefs, plans, projections, objectives, assumptions, future events or performance (often, but not always using phrases such as "plans", "expects", "is expected", "budget", "scheduled", "estimates", "forecasts", "intends", "anticipates", or "believes" or variations (including negative variations) of such words and phrases, or state that certain actions, events or results "may", "could", "would", "might" or "will" be taken, occur or be achieved) are not statements of historical fact and may be forward-looking statements. In this news release, forward-looking statements relate, among other things, to: the anticipated advancement of mineral properties or programs; future operations; future recovery metal recovery rates; future growth potential of Collective; and future development plans.

These forward-looking statements, and any assumptions upon which they are based, are made in good faith and reflect our current judgment regarding future events including final listing mechanics and the direction of our business. Management believes that these assumptions are reasonable. Forward-looking statements involve known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of the Company to be materially different from any future results, performance or achievements expressed or implied by the forward-looking statements. Such factors include, among others: risks related to the speculative nature of the Company's business; the Company's formative stage of development; the Company's financial position; possible variations in mineralization, grade or recovery rates; actual results of current exploration activities; conclusions of future economic evaluations; fluctuations in general macroeconomic conditions; fluctuations in securities markets; fluctuations in spot and forward prices of gold, precious and base metals or certain other commodities; fluctuations in currency markets; change in national and local government, legislation, taxation, controls regulations and political or economic developments; risks and hazards associated with the business of mineral exploration, development and mining (including environmental hazards, industrial accidents, unusual or unexpected formation pressures, cave-ins and flooding); inability to obtain adequate insurance to cover risks and hazards; the presence of laws and regulations that may impose restrictions on mining; employee relations; relationships with and claims by local communities and indigenous populations; availability of increasing costs associated with mining inputs and labour; the speculative nature of mineral exploration and development (including the risks of obtaining necessary licenses, permits and approvals from government authorities); and title to properties, as well as those risk factors discussed or referred to in the annual information form of the Company dated March 27, 2024. Forward-looking statements contained herein are made as of the date of this news release and the Company disclaims any obligation to update any forward-looking statements, whether as a result of new information, future events or results, except as may be required by applicable securities laws. There can be no assurance that forward-looking statements will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements and there may be other factors that cause results not to be anticipated, estimated or intended. Accordingly, readers should not place undue reliance on forward-looking statements.

 

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SOURCE Collective Mining Ltd.

FAQ

What were the gold recovery rates reported by Collective Mining (CNL) for the Apollo system?

Collective Mining reported an average gold dissolution of 94.3% from seven new variability samples in cyanidation tests for the Apollo system.

How did the new metallurgical tests improve gold and silver recoveries for Collective Mining's (CNL) Apollo project?

Optimization test work on a flotation concentrate improved overall gold recovery to 89.4% (up 5%) and silver recovery to 85.2% (up 3%) compared to previous results.

What processing method does Collective Mining (CNL) plan to use for the Apollo system?

Collective Mining plans to use a conventional split circuit, with copper-rich material treated through flotation and copper-poor material through cyanidation to produce doré. A gravity circuit is expected for tungsten recovery.

How many drill rigs does Collective Mining (CNL) have in operation for its 2024 drill program?

Collective Mining has five diamond drill rigs in operation as part of its fully funded 40,000-metre drill program for 2024.

Collective Mining Ltd.

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