NevGold Announces Up to 92% Antimony Recovery From Positive Metallurgical Testwork Program at Oxide Gold-Antimony Limo Butte Project in Nevada
NevGold Corp. (OTCQX:NAUFF) has announced significant metallurgical testwork results from its Limousine Butte Project in Nevada, demonstrating antimony recovery rates of up to 92% through acid leaching and up to 78% through sulfidized flotation. The testwork, conducted on both drill core and surface samples, showed minimal impact on gold recoveries in a potential combined gold-antimony mining scenario.
The company plans to advance to the next phase of drilling in the coming weeks, targeting a gold-antimony Mineral Resource Estimate by Q4-2025. This development is particularly significant given the recent U.S. Executive Order strengthening domestic mineral production, with antimony designated as a critical mineral for national security and technology applications. Currently, approximately 90% of global antimony supply is controlled by China, Russia, and Tajikistan.
NevGold Corp. (OTCQX:NAUFF) ha annunciato risultati significativi nei test metallurgici del suo progetto Limousine Butte in Nevada, dimostrando tassi di recupero dell'antimonio fino al 92% mediante lisciviazione acida e fino al 78% tramite flottazione sulfidizzata. I test, eseguiti sia su carotaggi che su campioni di superficie, hanno mostrato un impatto minimo sul recupero dell'oro in uno scenario potenziale di estrazione combinata di oro e antimonio.
L'azienda prevede di passare alla fase successiva di perforazione nelle prossime settimane, puntando a una stima delle risorse minerarie di oro e antimonio entro il quarto trimestre del 2025. Questo sviluppo è particolarmente rilevante alla luce del recente ordine esecutivo statunitense che rafforza la produzione mineraria nazionale, con l'antimonio designato come minerale critico per la sicurezza nazionale e le applicazioni tecnologiche. Attualmente, circa il 90% della fornitura globale di antimonio è controllata da Cina, Russia e Tagikistan.
NevGold Corp. (OTCQX:NAUFF) ha anunciado resultados significativos en pruebas metalúrgicas de su Proyecto Limousine Butte en Nevada, demostrando tasas de recuperación de antimonio de hasta el 92% mediante lixiviación ácida y hasta el 78% mediante flotación sulfidizada. Las pruebas, realizadas tanto en núcleos de perforación como en muestras superficiales, mostraron un impacto mínimo en la recuperación de oro en un posible escenario de minería combinada de oro y antimonio.
La compañía planea avanzar a la siguiente fase de perforación en las próximas semanas, con el objetivo de obtener una Estimación de Recursos Minerales de oro y antimonio para el cuarto trimestre de 2025. Este desarrollo es especialmente relevante dado el reciente Decreto Ejecutivo de EE.UU. que fortalece la producción minera nacional, designando al antimonio como un mineral crítico para la seguridad nacional y aplicaciones tecnológicas. Actualmente, aproximadamente el 90% del suministro mundial de antimonio está controlado por China, Rusia y Tayikistán.
NevGold Corp. (OTCQX:NAUFF)는 네바다에 위치한 Limousine Butte 프로젝트에서 중요한 야금학적 시험 결과를 발표했으며, 산성 침출법을 통해 안티몬 회수율이 최대 92%, 황화 부유법을 통해 최대 78%에 달함을 입증했습니다. 시추 코어와 지표 샘플 모두에서 수행된 시험은 금-안티몬 복합 채굴 시나리오에서 금 회수율에 미치는 영향이 거의 없음을 보여주었습니다.
회사는 향후 몇 주 내에 다음 단계 시추를 진행할 계획이며, 2025년 4분기까지 금-안티몬 광물 자원 평가를 목표로 하고 있습니다. 이 개발은 최근 미국 행정명령에 따라 국내 광물 생산이 강화된 상황에서 특히 중요하며, 안티몬은 국가 안보 및 기술 응용을 위한 핵심 광물로 지정되었습니다. 현재 전 세계 안티몬 공급의 약 90%가 중국, 러시아, 타지키스탄에 의해 통제되고 있습니다.
NevGold Corp. (OTCQX:NAUFF) a annoncé des résultats métallurgiques significatifs issus de son projet Limousine Butte au Nevada, démontrant des taux de récupération de l'antimoine allant jusqu'à 92% par lixiviation acide et jusqu'à 78% par flottation sulfidée. Les tests, réalisés sur des carottes de forage et des échantillons de surface, ont montré un impact minimal sur les récupérations d'or dans un scénario potentiel d'exploitation combinée or-antimoine.
La société prévoit de passer à la phase suivante de forage dans les semaines à venir, visant une estimation des ressources minérales en or et antimoine d'ici le quatrième trimestre 2025. Ce développement est particulièrement important compte tenu du récent décret exécutif américain renforçant la production minérale nationale, l'antimoine étant désigné comme un minéral critique pour la sécurité nationale et les applications technologiques. Actuellement, environ 90% de l'approvisionnement mondial en antimoine est contrôlé par la Chine, la Russie et le Tadjikistan.
NevGold Corp. (OTCQX:NAUFF) hat bedeutende metallurgische Testergebnisse von seinem Limousine Butte Projekt in Nevada bekanntgegeben, die Antimon-Rückgewinnungsraten von bis zu 92% durch Säurelaugung und bis zu 78% durch sulfidische Flotation zeigen. Die Tests, die sowohl an Bohrkernen als auch an Oberflächenproben durchgeführt wurden, zeigten eine minimale Auswirkung auf die Goldrückgewinnung in einem möglichen kombinierten Gold-Antimon-Abbauszenario.
Das Unternehmen plant, in den kommenden Wochen mit der nächsten Bohrphase zu beginnen und strebt eine Mineralressourcenschätzung für Gold und Antimon bis zum vierten Quartal 2025 an. Diese Entwicklung ist besonders bedeutsam angesichts der jüngsten US-Exekutivanordnung zur Stärkung der inländischen Mineralproduktion, wobei Antimon als kritisches Mineral für nationale Sicherheit und technologische Anwendungen eingestuft wurde. Derzeit kontrollieren China, Russland und Tadschikistan etwa 90% der weltweiten Antimonversorgung.
- Achieved up to 92% antimony recovery through acid leaching
- Successful antimony recovery with minimal impact on gold recoveries
- Project located in Nevada, a favorable mining jurisdiction
- Strategically positioned to benefit from US Executive Order supporting domestic critical mineral production
- Multiple viable processing options identified through metallurgical testing
- Project still in early stages, requiring additional drilling and testing
- Complex dual-metal recovery process requiring further optimization
- Resource estimate not yet completed
Vancouver, British Columbia, July 23, 2025 (GLOBE NEWSWIRE) -- NevGold Corp. (“NevGold” or the “Company”) (TSXV:NAU) (OTCQX:NAUFF) (Frankfurt:5E50) is pleased to announce extremely positive antimony (“Antimony”, “Sb”) metallurgical testwork results at its oxide gold-antimony Limousine Butte Project (the “Project”, “Limo Butte”) in Nevada, one of the world’s prolific mining jurisdictions.
The positive antimony metallurgical recovery results, that have minimal to no impact on gold recoveries, are a key development in unlocking the substantial gold-antimony potential of the Project, highlighting its promising prospects for further exploration and development.
Key Highlights
- Extremely positive antimony metallurgical testwork results from drill core and surface oxide gold-antimony samples including (Table 2):
-
- Acid Leaching indicating antimony extraction recovery between
75% and92% - Sulfidized Flotation indicating antimony recovery between
61% and78% - Core samples were from both Resurrection Ridge and Cadillac Valley, the two most advanced gold-antimony target areas at the Project
- Acid Leaching indicating antimony extraction recovery between
- Acid Leaching and Sulfidized Flotation will be advanced into the next stage of metallurgical testing and trade-off engineering studies
- Two plus 20-kilogram composite samples of both drill core and surface samples were used for testwork outlining a representative sample of the oxide gold-antimony mineralization at the Project
- Antimony recovery has minimal to no impact on the gold recovery in a potential combined gold-antimony mine scenario
- Drill rig will be mobilized in the coming weeks for the next phase of drilling focused on advancing Limo Butte to a gold-antimony Mineral Resource Estimate (“MRE”) by Q4-2025
NevGold CEO, Brandon Bonifacio, comments: “The results from the first phase of antimony metallurgical test work at Limo Butte have exceeded our expectations with up to
Limo Butte Planned 2025 Activities / Status Update
NevGold will continue its active exploration program at Limo Butte including:
- Evaluate the historical geological database with focus on gold and antimony (completed);
- Evaluate and re-analyze historical drilling with focus on gold and antimony (in progress, continues);
- Metallurgical testwork (1st Phase Completed);
- 2025 drilling of gold-antimony targets (drill rig will mobilize over the coming weeks).
Figure 1 – Limousine Butte Gold-Antimony Project with location of core and surface samples used in the antimony metallurgical testwork program. To view image please click here
Figure 2 – Surface metallurgical grab sample from Resurrection Ridge: silicified and oxidized carbonate breccia with visible stibiconite (antimony) as elongated white crystals up to 6 cm long. To view image please click here
Summary of Antimony Metallurgical Testwork Program
The gold-antimony zones at Limousine Butte are typically associated with silicification and the formation of jasperoid breccias within the Pilot Shale unit, which is the primary host rock for Carlin-type gold-antimony mineralization in the area.
Two plus 20-kilogram composite samples were sent to the Kappes, Cassiday & Associates laboratory (KCA) in Reno, Nevada, for initial antimony recovery metallurgical test work. The core sample was composed of material from the Resurrection Ridge and Cadilac Valley target areas (Figure 1) ranging from 64 meters to 377 meters deep. The surface outcrop sample was taken from several outcrops in the historically mined Golden Butte pit, and the nearby Nevada Antimony Mine prospect (Figure 1). Both the surface and core samples contained antimony oxide with minor antimony sulfide minerals. Head assays for the composites are summarized in Table 1.
| KCA Sample # | Description | Au g/t | Ag g/t | Sb % |
| 101178 B | Limo Core | 0.892 | 2.64 | > |
| 101179 B | Limo Surface | 0.27 | 1.13 | > |
Table 1 – Summary of test material characteristics from Limo Butte.
Initial metallurgical testwork on the antimony consisted of various proposed metallurgical processes including gravity, flotation, and leaching methods. The Leach testing consisted of both basic and acid leaches, with the best results produced from acid leaching indicating an overall antimony extraction recovery of between
Metallurgical Testwork Results - Summary
| KCA Sample # | Description | Test Type | Addition | Calc. Head, % Sb | Sb Extracted % |
| Leach | |||||
| 101178 B | Limo Core | Alkali | NaOH | 3.56 | 38 |
| 101178 B | Limo Core | Acid | H2SO4/HCL | 4.67 | 92 |
| 101179 B | Limo Surface | Alkali | NaOH | 7.17 | 8 |
| 101179 B | Limo Surface | Acid | H2SO4/HCL | 8.41 | 75 |
| Flotation | |||||
| 101178 B | Limo Core | Oxide RO | CuSO4*5H2O | 3.76 | 33 |
| 101178 B | Limo Core | Sulfide RO | Pb(NO3)2 | 3.77 | 35 |
| 101178 B | Limo Core | Sulfur Roast + Sulfide RO | Pb(NO3)2 | 4.06 | 61 |
| 101179 B | Limo Surface | Oxide RO | CuSO4*5H2O | 7.71 | 12 |
| 101179 B | Limo Surface | Sulfide RO | Pb(NO3)2 | 7.87 | 3 |
| 101179 B | Limo Surface | Sulfur Roast + Sulfide RO | Pb(NO3)2 | 8.57 | 78 |
| Gravity | |||||
| 101178 B | Limo Core | Gravity | 3.01 | 25 | |
| 101179 B | Limo Surface | Gravity | 8.15 | 32 | |
Table 2 – Summary of antimony metallurgical testwork results from Limo Butte.
Figure 3 – Limousine Butte Project with historical antimony in rock chips and soils. The total strike length between Resurrection Ridge and Cadillac Valley is +5km. To view image please click here
US Executive Order – Announced March 20, 2025
The Company is pleased to report the recent, sweeping Executive Order to strengthen American mineral production and reduce U.S. reliance on foreign nations for its mineral supply. Antimony (Sb) has been identified as an important “Critical Mineral” in the United States essential for national security, clean energy, and technology applications, yet no domestically mined supply currently exists.
The Executive Order invokes the use of the Defense Production Act as part of a broad United States (“US”) Government effort to expand domestic minerals production on national security grounds. As it relates to project permitting, the Order states that it will "identify priority projects that can be immediately approved or for which permits can be immediately issued, and take all necessary or appropriate actions…to expedite and issue the relevant permits or approvals." Furthermore, the Order includes provisions to accelerate access to private and public capital for domestic projects, including the creation of a "dedicated mineral and mineral production fund for domestic investments" under the Development Finance Corporation ("DFC").
This decisive action by the US Government highlights the urgent need to expand domestic minerals output to support supply chain security in the United States. This important Order will help revitalize domestic mineral production by improving the permitting process and providing financial support to qualifying domestic projects.
Importance of Antimony
Antimony is considered a “Critical Mineral” by the United States based on the U.S. Geological Survey’s 2022 list (U.S.G.S. (2022)). “Critical Minerals” are metals and non-metals essential to the economy and national security. Antimony is utilized in all manners of military applications, including the manufacturing of armor piercing bullets, night vision goggles, infrared sensors, precision optics, laser sighting, explosive formulations, hardened lead for bullets and shrapnel, ammunition primers, tracer ammunition, nuclear weapons and production, tritium production, flares, military clothing, and communication equipment. Other uses include technology (semi-conductors, circuit boards, electric switches, fluorescent lighting, high quality clear glass and lithium-ion batteries) and clean-energy storage.
Globally, approximately
Perpetua Resources Corp. (“Perpetua”, NASDAQ:PPTA, TSX:PPTA) has the most advanced domestic gold-antimony project in the United States. Perpetua’s project, known as Stibnite, is located in Idaho approximately 130 km northeast of NevGold’s Nutmeg Mountain and Zeus projects. Positive advancements at Stibnite including the technical development and permitting has led to US
Figure 4 – Limousine Butte Land Holdings and District Exploration Activity To view image please click here
ON BEHALF OF THE BOARD
“Signed”
Brandon Bonifacio, President & CEO
For further information, please contact Brandon Bonifacio at bbonifacio@nev-gold.com, call 604-337-4997, or visit our website at www.nev-gold.com.
Sampling Methodology, Chain of Custody, Quality Control and Quality Assurance:
NevGold QA/QC protocols are followed on the Project and include insertion of duplicate, blank and standard samples in all drill holes. A 30g gold fire assay and multi-elemental analysis ICP-OES method was completed by ISO 17025 certified American Assay Labs, Reno.
The metallurgical work was carried out by Kappes, Cassiday and Associates based in Reno, Nevada. Head assays were ground to
The Company’s Qualified Person (“QP”), Greg French, Vice President, Exploration has completed a review of the historical data in this press release. The historic data collection chain of custody procedures and analytical results by previous operators appear adequate and were completed to industry standard practices. For the Newmont and US Gold data a 30g gold fire assay and multi-elemental analysis ICP-OES method MS-41 was completed by ISO 17025 certified ALS Chemex, Reno or Elko Nevada.
Technical information contained in this news release has been reviewed and approved by Greg French, CPG, the Company’s Vice President, Exploration, who is NevGold’s Qualified Person under National Instrument 43-101 and responsible for technical matters of this release.
About the Company
NevGold is an exploration and development company targeting large-scale mineral systems in the proven districts of Nevada and Idaho. NevGold owns a
Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.
Cautionary Note Regarding Forward Looking Statements
This news release contains forward-looking statements that are based on the Company’s current expectations and estimates. Forward-looking statements are frequently characterized by words such as “plan”, “expect”, “project”, “intend”, “believe”, “anticipate”, “estimate”, “suggest”, “indicate” and other similar words or statements that certain events or conditions “may” or “will” occur. Forward-looking statements include, but are not limited to, the proposed work programs at Limousine Butte, and the exploration potential at Limousine Butte. Such forward-looking statements involve known and unknown risks, uncertainties and other factors that could cause actual events or results to differ materially from estimated or anticipated events or results implied or expressed in such forward-looking statements. Such risks include, but are not limited to, general economic, market and business conditions, and the ability to obtain all necessary regulatory approvals. There is some risk that the forward-looking statements will not prove to be accurate, that the management’s assumptions may not be correct or that actual results may differ materially from such forward-looking statements. Accordingly, readers should not place undue reliance on the forward-looking statements. Any forward-looking statement speaks only as of the date on which it is made and, except as may be required by applicable securities laws, the Company disclaims any intent or obligation to update any forward-looking statement, whether as a result of new information, future events or results or otherwise. Forward-looking statements are not guarantees of future performance and accordingly undue reliance should not be put on such statements due to the inherent uncertainty therein.
References
Blackmon, D. (2021) Antimony: The Most Important Mineral You Never Heard Of. Article Prepared by Forbes.
Kurtenbach, E. (2024) China Bans Exports to US of Gallium, Germanium, Antimony in response to Chip Sanctions. Article Prepared by AP News.
Lv, A. and Munroe, T. (2024) China Bans Export of Critical Minerals to US as Trade Tensions Escalate. Article Prepared by Reuters.
Lv, A. and Jackson, L. (2025) China’s Curbs on Exports of Strategic Minerals. Article Prepared by Reuters.
Perpetua Resources. (2025) Antimony Summary. Articles and Videos Prepared by Perpetua Resources.
Sangine, E. (2022) U.S. Geological Survey, Mineral Commodity Summaries, January 2023. Antimony Summary Report prepared by U.S.G.S
U.S.G.S. (2022) U.S. Geological Survey Releases 2022 List of Critical Minerals. Reported Prepared by U.S.G.S
FAQ
What antimony recovery rates did NevGold (NAUFF) achieve at Limousine Butte?
When will NevGold complete the Mineral Resource Estimate for Limousine Butte?
How does the US Executive Order affect NevGold's antimony project?
What is the current global antimony supply situation?
What are the next steps for NevGold's Limousine Butte Project?
