Sidney Resources Expands Warren District Footprint With 380 New Claims Targeting REE-Bearing Pegmatites and Historic Gold-Silver Systems
Rhea-AI Summary
Sidney Resources (OTC:SDRC) announced staking of 380 federal mining claims (~7,600 acres) in Idaho's Warren Mining District on December 9, 2025 to expand control of pegmatite corridors and historic gold-silver systems.
The company cited breakthrough REE lab results: 30% TREO gravity concentrates and 60–65% TREO leach residuals, and said mapping shows district-scale pegmatitic structures hosting REEs, lithium, tantalum and niobium. Sidney says the expansion secures core structural corridors, historic producers, and newly identified REE-bearing trends while responding to nearby third-party claim activity.
Positive
- 380 new claims added (~7,600 acres)
- 30% TREO gravity concentrate result reported
- 60–65% TREO leach residuals reported
- Claims target REE, lithium, tantalum and niobium pegmatite corridors
Negative
- Nearby unrelated third-party claim expansion could complicate district competition
News Market Reaction
On the day this news was published, SDRC declined 0.07%, reflecting a mild negative market reaction.
Data tracked by StockTitan Argus on the day of publication.
Key Figures
Market Reality Check
Peers on Argus
Peer moves are mixed: some miners like OCGSF (+14.43%) and SLVTF (+15.26%) are up, while others such as SMDRF (-1.07%) and GMTLF (-1.08%) are down. SDRC’s strong pre-news gain of +19.71% appears more stock-specific than broad sector rotation.
Historical Context
| Date | Event | Sentiment | Move | Catalyst |
|---|---|---|---|---|
| Dec 09 | Land expansion news | Positive | -0.1% | Staking 380 new claims to secure REE-bearing pegmatites and historic workings. |
| Nov 04 | Metallurgy update | Positive | -0.1% | Reported exceptionally high rare earth and critical metal concentrations from lab work. |
| Oct 28 | Metallurgy results | Positive | +0.0% | Disclosed 20 g/t gold and high TREO grades with dual-process flowsheet concept. |
Recent positive technical and REE-focused updates have seen flat to slightly negative immediate price reactions, suggesting limited short-term trading follow-through on strong headlines.
Over the last few months, Sidney Resources highlighted high-grade REE and gold potential in Idaho’s Warren District. On Oct 28, 2025, it reported dual-process metallurgy with up to 60% TREO leach residuals. On Nov 4, 2025, it confirmed exceptional rare earth and critical metal grades. The Dec 9, 2025 news extended this story by staking 380 claims (~7,600 acres) to consolidate control over REE-bearing pegmatites and historic gold-silver systems, but prior similar news produced muted immediate price moves.
Market Pulse Summary
This announcement adds scale and optionality, with Sidney staking 380 new federal mining claims covering about 7,600 acres in the Warren District, underpinned by lab results of 30% TREO gravity concentrates and 60–65% TREO leach residuals. Recent history shows several REE-focused updates, so this fits a continuing district-scale buildout. Key factors to monitor include follow-up drilling, metallurgical optimization, permitting progress, and how the enlarged land package feeds into resource estimates.
Key Terms
rare earth element technical
pegmatites technical
pegmatite dikes technical
magmatic-hydrothermal system technical
AI-generated analysis. Not financial advice.
WARREN, ID / ACCESS Newswire / December 9, 2025 / Sidney Resources Corporation (OTCID:SDRC) ("Sidney" or the "Company") is pleased to announce a major expansion of its land position in Idaho's historic Warren Mining District. Following the Company's confirmation of exceptional high-grade rare earth element (REE) and critical metal concentrations within the Knott Vein and Lucky Ben systems, Sidney has officially initiated the staking of 380 new federal mining claims, representing approximately 7,600 acres of additional mineral rights.
This expansion is designed to secure newly identified geological structures, pegmatite corridors, and historically productive precious-metal zones that are now recognized as part of a broader, district-scale mineral system. With this expansion, Sidney Resources reaffirms its position as one of the most dominant and historically established mineral rights holders in the Warren District.
Figure 1 - Warren District Consolidated Land Position. Updated land position map highlighting Sidney Resources Corporation's dominant footprint in the Warren Mining District.
Expansion Driven by New Geological Insights and REE Breakthrough Results
The Company's recent laboratory results confirming:
30% TREO Gravity Concentrates, and60
-65% TREO Leach Residuals
have reshaped the modern geological interpretation of the Warren District.
Subsequent mapping and structural analysis have identified significant pegmatite dikes and pegmatitic structural zones throughout the region-host environments globally associated with REEs, lithium, tantalum, niobium, and other critical elements. Their presence strongly supports an evolved magmatic-hydrothermal system capable of producing both precious and critical minerals across a wide regional footprint.
These findings directly integrate with the Company's breakthrough REE results and demonstrate that Warren's mineralized system extends beyond the known Knott Vein and Lucky Ben structures.
Strategic Purpose of the Expansion
The 380-claim expansion was designed to achieve two core objectives:
1. Capture REE-Prospective Pegmatite Corridors
These newly mapped zones represent some of the most promising host environments for REEs and battery metal mineralization in the district.
2. Assert District Dominance & Reinforce Sidney's Historic Presence
A second key purpose of this expansion is to reaffirm Sidney Resources' deep historical roots and long-standing presence in Idaho's mining industry. Founded in 1896 and incorporated in 1910, the Company carries forward a legacy that spans more than a century, and since 2003 has maintained an active and consistent presence in the Warren Mining District. This renewed momentum reflects Sidney's ongoing commitment to advancing responsible exploration and development in one of Idaho's most historic mining regions.
The addition of 380 new mining claims strengthens the Company's position as the dominant mineral rights stakeholder across one of Idaho's most prospective precious- and critical-mineral districts.
The map also includes a large blue-outlined claim block representing a recent expansion by an unrelated third party with ties to financier Thomas Kaplan. Sidney's expansion ensures that the Company maintains control over the core structural corridors, historic producers, and newly recognized REE-bearing pegmatite trends that define the heart of the Warren District mineral system.
By securing this ground now, Sidney protects its historic position, strategic access, and district-scale development plan.
CEO Commentary - Sean-Rae Zalewski
"Our recent breakthrough REE results revealed that Warren's mineralized system is significantly larger than originally understood," said Sean-Rae Zalewski, CEO of Sidney Resources Corporation. "This 380-claim expansion is our strategic response-locking down the pegmatite trends, structural pathways, and historic producers that are essential for building a true district-scale mining operation.
"This also ensures Sidney maintains leadership in the region despite new claim activity from unrelated third parties. Our Company has been part of Warren since 1896, and this expansion reinforces our long-standing position while setting the stage for future development, resource growth, and revenue generation across both precious and critical minerals."
A Strengthened Role in U.S. Critical Mineral Independence
With this expansion, Sidney Resources significantly increases its capacity to advance domestic supplies essential to:
National defense & aerospace
Electric vehicle motors & battery technologies
Wind energy systems
Clean-energy manufacturing
Hydrogen and advanced industrial applications
Combined with ongoing metallurgical success, the Warren District continues to emerge as one of the most strategically important domestic sources of precious, strategic, and critical minerals.
Figure 2 - Warren District Expansion Map:
Pink grid: existing Sidney Resources claim blocks.
Yellow pins: documented historic mineral occurrences.
Blue outline: recent third-party claim expansion (unaffiliated with SDRC; linked to interests associated with Thomas Kaplan).
Newly secured zones strengthen Sidney's control over historic producers and REE-prospective corridors.
About Sidney Resources Corporation
Sidney Resources Corporation (OTC:SDRC) is a U.S. mineral exploration and development company advancing high-grade rare earth elements, gold, silver, tungsten, and platinum-group metals in Idaho's historic Warren Mining District. Sidney controls over 4,000 acres of patented and unpatented claims and is now expanding an additional 7,600 acres across 380 newly staked mining claims targeting REE-bearing pegmatites and historically productive vein systems. Ongoing gravity and leach test work continues to validate near-term production pathways while the Company develops advanced mining and bioremediation technologies supporting responsible and sustainable operations.
Forward-Looking Statements
This press release contains forward-looking statements as defined within Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. These statements relate to future events, including our ability to raise capital, or to our future financial performance, and involve known and unknown risks, uncertainties and other factors that may cause materially different results, levels of activity, performance or achievements expressed or implied by these forward-looking statements. You should not place undue reliance on forward-looking statements since they involve known and unknown risks, uncertainties and other factors which are, in some cases, beyond our control and which could, and likely will, materially affect actual results, levels of activity, performance or achievements. Any forward-looking statement reflects our current views with respect to future events and is subject to these and other risks, uncertainties and assumptions relating to our operations, results of operations, growth strategy and liquidity. We assume no obligation to publicly update or revise these forward-looking statements for any reason, or to update the reasons actual results could differ materially from those anticipated in these forward-looking statements, even if new information becomes available in the future.
For a discussion of these risks and uncertainties, please see our filings with the OTC Markets Group Inc. Our public filings with the OTC Markets Group Inc are available from commercial document retrieval services and at the website maintained by the OTC Markets at https://www.otcmarkets.com/stock/SDRC/disclosure
For more information on Sidney Resources Corporation and its ESG initiatives, visit: https://sidneyresources.com/about-us/sustainability/
For further information, contact:
Dan Hally
COO, Sidney Resources Corporation
Phone: 509-552-9858
dan@sdrccorp.com
Website: https://sidneyresources.com/
SOURCE: Sidney Resources Corp.
View the original press release on ACCESS Newswire
FAQ
What did Sidney Resources (SDRC) announce on December 9, 2025 about Warren District claims?
What REE assay results did Sidney Resources (SDRC) report for the Warren District in December 2025?
How does the 380-claim expansion affect Sidney Resources (SDRC) strategic position?
Which critical minerals does Sidney target with the Warren District expansion (SDRC)?
Does the December 2025 announcement mention competing claim activity near Sidney (SDRC)?
What strategic sectors could benefit from Sidney Resources' (SDRC) Warren District REE potential?
