Sentinel Metals Expands North American Gold Portfolio with 1Moz Big Springs Deal
Sentinel Metals (ASX:SNM) is set to nearly double its North American gold resources with the acquisition of the Big Springs Gold Project in Nevada, adding 1.01 million ounces to its portfolio alongside Montana’s Columbia Project.
- Acquisition adds 1.01Moz gold resource in Nevada
- Big Springs project is permitted for open pit and underground mining
- Combined North American gold platform now ~2Moz
- Transaction includes $8.5m cash and $5m in shares upfront
- Sentinel plans $15m capital raise to fund acquisition and exploration
Big Springs Acquisition Nearly Doubles Sentinel’s Gold Resources
Sentinel Metals Limited (ASX:SNM) has taken a decisive step in its North American expansion, agreeing to acquire the Big Springs Gold Project in Nevada from Capricorn Metals (ASX:CMM). This 1.01 million ounce gold resource nearly doubles Sentinel’s existing footprint, complementing its flagship Columbia Gold-Silver Project in Montana, which hosts 920,000 ounces of gold and 3.1 million ounces of silver.
Big Springs boasts a JORC-compliant Mineral Resource Estimate (MRE) of 15.5 million tonnes at 2.0 grams per tonne gold, translating to 1.01 million ounces of contained gold. The project is fully permitted for both open cut and underground mining, offering Sentinel immediate operational optionality in one of the world’s premier gold jurisdictions.
Strategic Location and Growth Potential in Nevada’s Independence Trend
Situated in Elko County within Nevada’s prolific Independence Trend, Big Springs lies adjacent to First Majestic Silver Corp’s Jerritt Canyon mine and mill complex. While Jerritt Canyon is currently on care and maintenance, First Majestic targets a restart of operations in late 2027, underscoring the region’s mining infrastructure and potential synergies.
Sentinel highlights significant exploration upside at Big Springs, with drill-ready targets inside the existing Mining Lease and high-grade underground ore shoots that remain open at depth. Historical drilling includes standout intercepts such as 17.7 metres at 33.4 grams per tonne gold, indicating robust mineralisation continuity. The project’s 93 square kilometre landholding is underexplored despite its proximity to major Nevada gold systems, offering further discovery potential.
Deal Structure and Funding Plans
The acquisition consideration comprises $8.5 million in cash and $5 million in Sentinel shares, with the latter subject to a 12-month escrow. Contingent payments of up to $12.5 million are payable upon achieving resource milestones or divestment, introducing performance-based incentives aligned with resource growth.
To fund the acquisition and ongoing exploration at both Big Springs and Columbia, Sentinel is undertaking a $15 million capital raise via a placement priced at 58 cents per share. The company has engaged Canaccord Genuity and Euroz Hartleys as joint lead managers, with shareholder approval sought in a general meeting scheduled for late August 2026.
Complementing Columbia’s Maiden Drilling Campaign
Sentinel’s Managing Director Matt Herbert emphasised the complementary nature of Big Springs to the Columbia Project, where a maiden drilling program is underway targeting resource extensions and new discoveries. The addition of Big Springs establishes Sentinel as an emerging North American gold company with a combined resource base of approximately 2 million ounces across two advanced projects in Tier-1 US jurisdictions.
The company anticipates first assay results from Columbia’s drilling in about six weeks, with exploration and development activities continuing apace across both projects. Sentinel’s strategy focuses on advanced exploration assets with clear pathways to value creation, and Big Springs’ existing permits and infrastructure provide a platform for near-term production potential.
Technical Depth and Resource Confidence at Big Springs
The Big Springs MRE is underpinned by over 2,500 drill holes totaling 300,000 metres, incorporating historical drilling from Independence Mining and Gateway Gold, as well as recent programs by Anova Metals USA LLC, the current project holder. The resource is classified as 0.86 million tonnes measured at 4.7 g/t gold, 6 million tonnes indicated at 2.2 g/t, and 8.63 million tonnes inferred at 1.7 g/t, reflecting solid geological and grade continuity.
Mining studies propose open pit extraction for certain zones and underground mining for deeper mineralisation. Historical mining between 1987 and 1993 yielded 386,000 ounces from seven open pits, with stable pit walls reported decades later. Metallurgical testwork supports the use of conventional gravity and carbon-in-leach processing methods common in Nevada.
While no project-specific economic studies have been completed on cut-off grades, benchmarking against nearby operations suggests the current resource is economically viable. Sentinel plans targeted drilling to expand known high-grade ore shoots and explore broader district-scale targets within the tenure.
Bottom Line?
Sentinel’s acquisition of Big Springs positions it as a serious North American gold player, but the next year will test its ability to convert exploration potential into resource growth and production milestones.
Questions in the middle?
- Will Sentinel’s planned drilling at Big Springs confirm the high-grade extensions and unlock further resource growth?
- How will the market respond to the capital raise and potential dilution from consideration and placement shares?
- What are the timelines and challenges for advancing Big Springs towards production, given the proximity but no current processing agreements with First Majestic?
