Noble Plains Uranium Achieves 87% Success Rate with Strong Initial Drill Results from First Eight Holes at Duck Creek Project in Wyoming

Rhea-AI Summary

Noble Plains Uranium (OTCQB: NBLXF) reported initial drill results from eight holes at the Duck Creek Project (Wyoming) with a reported >87% hit ratio: seven of eight holes intersected mineralisation. Average Grade‑Thickness (GT) of 1.0 (about 67% higher than the 0.598 GT used in the company's prior technical target) with an average intercept thickness of 17.6 ft and average grade of 0.057% eU3O8. Results come from a planned up-to-150‑hole, 37,400 ft program aimed at confirming historic data, expanding the 3‑mile Wasatch roll-front trend, and first-ever Fort Union tests. The company targets a NI 43‑101 resource estimate in H1 2026 and cautions eU3O8 gamma readings may not equal lab uranium concentrations and the exploration target is conceptual.

Positive

• Hit ratio >87% (7 of 8 holes mineralised)
• Average GT of 1.0, ~67% above the prior 0.598 assumption
• Average intercept 17.6 ft at 0.057% eU3O8

Negative

• Sample size limited to 8 holes so far
• Two holes returned GT below typical 0.2 cut-off (holes 25-28-002, 25-28-008)
• eU3O8 readings may not reflect actual uranium due to possible disequilibrium

Key Figures

Success hit ratio >87% First eight drill holes at Duck Creek

Average Grade-Thickness 1.0 GT First 7 of 8 mineralised holes vs 0.2 cutoff

Average thickness 17.6 ft Intercepts in first 7 of 8 holes

Average grade 0.057% eU3O8 First 7 of 8 mineralised holes at Duck Creek

Exploration target (low) 2.37M tons @ 0.03% U3O8 Technical Report exploration target lower range

Exploration target (high) 5.45M tons @ 0.05% U3O8 Technical Report exploration target upper range

Drill program size 37,400 ft / ~150 holes Permitted Duck Creek drill program

Fort Union tests depth ~1,200 ft Planned deep holes targeting Fort Union Formation

Market Reality Check

$0.1058 Last Close

Volume Volume 163,936 is 1.62x the 20-day average of 101,267 shares. high

Technical Price 0.10585 is trading above the 200-day MA at 0.09 after this positive drill update.

Peers on Argus

Peers showed mixed moves, with TCEFF down 10.26% and NVTQF down 90.96%, while STTDF and SUUFF rose 4.9% and 1.64%, suggesting NBLXF’s gain is more company-specific than sector-wide.

Historical Context

Date	Event	Sentiment	Move	Catalyst
Dec 09	Drill results update	Positive	+2.1%	Second batch of 16 Duck Creek holes with 81% success rate and strong GT.
Dec 01	Initial drill results	Positive	+3.1%	First eight Duck Creek holes with >87% hit ratio and GT well above plan.
Nov 25	Drill permit granted	Positive	-9.2%	Permit and launch of 37,400 ft, ~175-hole Duck Creek drill program.
Nov 03	CEO transition	Neutral	+1.0%	Appointment of Drew Zimmerman as CEO and Paul Cowley as COO.
Oct 08	Board appointment	Positive	-8.6%	Addition of veteran uranium geologist Chris Healey to board.

Pattern Detected

Positive Duck Creek drill updates have recently coincided with modest price gains, while permitting and board changes saw negative reactions despite constructive narratives.

Recent Company History

Over recent months, Noble Plains Uranium focused on advancing its Wyoming assets and corporate team. On Oct 08, it added veteran geologist Chris Healey to the board, followed by appointing Drew Zimmerman as CEO on Nov 03. The Duck Creek drill permit and 37,400 ft program were announced on Nov 25. The current Dec 01 release delivered strong initial Duck Creek drill results, which were reinforced by a second high‑success batch on Dec 09, all aimed at supporting a NI 43‑101 resource in 2026.

Market Pulse Summary

This announcement details strong initial drilling at Duck Creek, with seven of eight holes mineralised, an average GT of 1.0, and average thickness of 17.6 ft at 0.057% eU3O8. These results exceed GT assumptions used in the project’s conceptual exploration target and support a broader 37,400 ft, ~150‑hole program. Investors may watch future batches, deeper Fort Union tests, and progress toward a NI 43‑101 resource estimate targeted for the first half of 2026.

Key Terms

grade-thickness (gt) technical

"seven of the first eight holes intersected uranium mineralisation averaging five times above the industry standard Grade-Thickness ("GT") cut-off"

Grade-thickness (gt) is a simple measure used in mining to estimate how much valuable material lies in a slice of rock by multiplying the concentration of the commodity (grade) by the width of the mineralized zone (thickness). Think of it like multiplying the strength of a flavor by how wide a slice of cake is — higher gt means more contained metal per unit area, so investors use it to compare the economic potential of different drill results or deposits quickly.

roll front technical

"typically used in Wyoming roll front uranium deposits with an average GT of 1.0"

A roll front is a type of underground mineral deposit formed where oxygen-rich water meets reduced groundwater, causing dissolved uranium (or other metals) to precipitate out and concentrate along a moving chemical boundary. For investors, roll-front deposits matter because their shape, depth and chemistry influence how easily the material can be mined, the likely grade and recovery rates, and the environmental and permitting challenges—think of it like a stain line in a cup where valuable particles collect and determine how hard they are to clean up and extract.

national instrument 43-101 regulatory

"support a uranium resource prepared in accordance with National Instrument 43-101 standards"

National Instrument 43-101 is a set of rules and guidelines that govern how mineral exploration and mining companies must report information about their projects. It ensures that the details shared with investors are accurate, consistent, and reliable—similar to how a detailed, verified blueprint ensures a building’s safety. This helps investors make informed decisions based on trustworthy information about a company's mineral resources.

gamma-ray probes technical

"based on equivalent uranium (eU3O8) of the gamma-ray probes calibrated at the Department of Energy's Test Facility"

Gamma-ray probes are handheld or compact instruments that detect high-energy photons emitted by small amounts of radioactive material placed in or on the body, used during imaging or surgery to locate tumors, lymph nodes or other areas of disease. They matter to investors because improved detection tools can shorten procedures, raise success rates and cut follow-up costs, affecting clinical adoption, regulatory clearance, reimbursement and the revenue prospects of medical device and biotech firms — like a metal detector guiding a surgeon to a hidden target.

mud-rotary rig technical

"drilling was completed by Tyler Exploration Inc. utilizing a truck mounted mud-rotary rig"

A mud-rotary rig is a type of drilling setup that uses a rotating drill bit and a continuous flow of drilling fluid (called “mud”) to cut into rock, carry rock fragments to the surface, cool the bit, and maintain pressure in the hole. For investors, the rig signals how quickly and cheaply a well can be drilled, the likely operational risks and environmental controls required, and thus influences project timelines, capital spending and potential production revenue — think of the rig as the engine and circulation system that keeps a drilling job running smoothly.

AI-generated analysis. Not financial advice.

Vancouver, British Columbia--(Newsfile Corp. - December 1, 2025) - Noble Plains Uranium Corp. (TSXV: NOBL) (OTCQB: NBLXF) (FSE: INE0) ("Noble Plains" or the "Company"), a U.S. focused uranium exploration and development company, is pleased to announce strong thickness and grade results demonstrating a >87% success hit ratio from the initial eight drill holes completed at its flagship Duck Creek Project in Wyoming's Powder River Basin.

"These first holes represent the initial results from a planned 150-hole program and have exceeded expectations," stated Paul Cowley, Chief Operating Officer of Noble Plains. "Seven of the first eight holes intersected uranium mineralisation averaging five times above the industry standard Grade-Thickness ("GT") cut-off of 0.2 typically used in Wyoming roll front uranium deposits with an average GT of 1.0. GT is a simple calculation of thickness times grade. Average thickness of intercepts in these first 7 of 8 holes is 17.6 feet at an average grade of 0.057% eU3O8. These early results set a positive tone and are strong building blocks for evaluating and quantifying the 3-mile-long uranium trend at Duck Creek."

Table 1: Drill Intercept Highlights

Hole ID	Hole Depth  (ft)	From (ft)	To (ft)	Length (ft)	Grade (% eU3O8)*	Grade x Thickness (GT)
25-28-001	225	131.0	145.0	14.0	0.092	1.29
25-28-002	220	62.5	66.5	4.0	0.042	0.17
25-28-003	220	85.5	105.0	19.5	0.063	1.30
25-28-004	220	93.0	120.0	27.0	0.037	1.00
25-28-005	220	94.0	113.0	19.0	0.049	0.93
25-28-006	220	56.0	73.0	17.0	0.049	0.83
25-28-007	220	124.5	146.5	22.0	0.055	1.21
25-28-008	220	133.0	145.0	12.0	0.036	0.43

 

Including:

Hole ID	Hole Depth  (ft)	From (ft)	To (ft)	Length (ft)	Grade (% eU3O8)*	Grade x Thickness (GT)
25-28-001	225	131.5	141.0	9.5	0.127	1.21
25-28-003	220	93.0	101.5	8.5	0.120	1.02
25-28-007	220	130.5	142.0	11.5	0.085	0.98

 

The Company filed a Technical Report, available on SEDAR+ under the Company's profile, on the Duck Creek Project on August 14, 2025, which outlined an exploration target ranging from 2.37 million tons at 0.03% U₃O₈ to 5.45 million tons at 0.05% U₃O₈. These ranges were based on assumed Grade-Thickness ("GT") values of 0.2 for the lower case and 0.598 for the upper case. The exploration target is conceptual in nature, does not meet the standards to be classified as mineral resources or mineral reserves, and there is no certainty that the exploration target will be realized.

The Company notes that the first seven mineralised holes returned an average GT of 1.0, approximately 67% higher than the 0.598 GT used in the upper range of the Technical Report. While only eight holes have been completed so far, these early results are materially stronger than the assumptions used in the project's original valuation.

The Company is releasing these initial results early to demonstrate that the drill program is performing better than anticipated and to highlight the strength of the historic dataset the Company relied upon for acquisition, valuation, and program design. Figure 1 shows the location of the first eight holes within the 3-mile-long trend of historic drilling. These first holes are part of the 130 planned "expansion" holes referred to under the Ongoing Drill Program Overview section below. Larger batches of drill results will be released as the program advances.

"These results are a robust validation of our entire strategy at Noble Plains," said Drew Zimmerman, CEO of Noble Plains Uranium. "We moved quickly on Duck Creek because the historic dataset showed clear potential for meaningful pounds in the ground, and these early holes confirm we were right to have that conviction. Achieving an average GT of 1.0, five times the typical cut-off, on our very first holes is exceptional. We acquired an undervalued brownfield asset with over 4,000 historic holes and are now working to quantify the full potential of mineralization that is off to a strong start. This is our aim as a company: identify undervalued brownfield projects, execute decisively, and work to convert legacy data into pounds in the ground with urgency. With drilling continuing, momentum is building, and we're just getting started."

Figure 1 - New Drillhole Locations

To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/3717/276387_32f2f7438442eba9_001full.jpg

Ongoing Drill Program Overview

The Duck Creek drill program, permitted for up to 37,400 ft across ~150 holes, is structured around three key objectives:

1. Confirmation of Historic Data - 16 Holes

To verify 1,317 historic intercepts in the Wasatch Formation and support a uranium resource prepared in accordance with National Instrument 43-101 standards.

2. Expansion of Shallow Mineralisation ~ 130 Holes

Designed to extend mineralised boundaries and target higher-grade areas along the 3-mile-long Wasatch roll-front corridor.

3. First-Ever Drilling of the Fort Union Formation ~ 10 Holes

For the first time, Noble Plains will drill to ~1,200 ft to test the Fort Union, where neighbouring projects host the majority of their compliant resources.

Details of the Drilling Program

* The geophysical results are based on equivalent uranium (eU3O8) of the gamma-ray probes calibrated at the Department of Energy's Test Facility in Casper, Wyoming. A geophysical tool with gamma-ray, spontaneous potential, resistivity, and drift detectors was utilized. The reader is cautioned that the reported uranium grades may not reflect actual concentrations due to the potential for disequilibrium between uranium and its gamma emitting daughter products.

• Mineralized holes with thicker, higher-grade intercepts are interpreted to be in the Interface, Nose, or Near Seepage ground located within the projected roll front system.
• Mineralized holes with thinner, below cutoff grade intercepts are interpreted to be in the tails (Near Interior) or Remote Seepage ground located behind (altered) or ahead (reduced) of the projected roll front system, respectively.
• The drill results were determined using thickness and grade % cutoffs of 2-ft and 0.02% eU3O8.

The drilling was completed by Tyler Exploration Inc. utilizing a truck mounted mud-rotary rig and the geophysical logging by Hawkins CBM Logging, both of Wyoming. Bradley Parkes P.Geo, VP Exploration and Paul Cowley P.Geo, Chief Operating Officer for Noble Plains Uranium Corp., supervised the drilling activities.

Next Steps and Outlook

Drilling is ongoing and the Company will continue releasing results in batches to maintain transparency and demonstrate progress as the confirmation and expansion phases advance. The first deep Fort Union tests are planned for later in the program.

With the results of the first drill campaign currently in progress and the historic database, the Company continues to aim for a resource estimate prepared in accordance with National Instrument 43-101 standards in the first half of 2026.

About Noble Plains Uranium

Noble Plains Uranium Corp. is a U.S.-focused uranium exploration and development company advancing a portfolio of high-potential projects amenable to In Situ Recovery (ISR) — the most capital-efficient and environmentally responsible method of uranium extraction. Our strategy targets historically drilled and underexplored assets in proven jurisdictions, with the objective of rapidly delineating NI 43-101 compliant resources and building a scalable inventory of domestic uranium.

On Behalf of the Board of Directors,

"Drew Zimmerman", CEO & President

For further information, please contact: Drew Zimmerman: (778) 686-0973
Website: www.nobleplains.com

Bradley Parkes, P.Geo., VP Exploration of Noble Plains Uranium Corp., is the Qualified Person as defined in National Instrument 43-101, who has read and approved the technical content of this news release.

This news release includes certain forward-looking statements as well as management's objectives, strategies, beliefs and intentions. Forward-looking statements are frequently identified by such words as "may", "will", "plan", "expect", "anticipate", "estimate", "intend" and similar words referring to future events and results. Forward-looking statements include, but are not limited to, statements regarding the planned drill program, the timing of drilling and results, the potential to outline a uranium resource prepared in accordance with National Instrument 43-101 standards, the potential to confirm or expand mineralisation, and the expected advancement of the Company's exploration strategy. Forward-looking statements are based on the current opinions and expectations of management. All forward-looking information is inherently uncertain and subject to a variety of assumptions, risks and uncertainties, including but not limited to: the Company's ability to complete the drill program as planned, the interpretation of historic data, the accuracy of geological modelling, the results of drilling and downhole probing, operational risks and weather delays, regulatory approvals, availability of equipment and personnel, the speculative nature of mineral exploration and development, and fluctuating commodity prices, as described in more detail in our recent securities filings available at www.sedarplus.ca. Actual events or results may differ materially from those projected in the forward-looking statements and we caution against placing undue reliance thereon. We assume no obligation to revise or update these forward-looking statements except as required by applicable law.

Neither the TSX Venture Exchange nor its Regulations Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accept responsibility for the adequacy or accuracy of this release.

To view the source version of this press release, please visit https://www.newsfilecorp.com/release/276387

FAQ

What did Noble Plains (NBLXF) announce on December 1, 2025 about Duck Creek drilling?

Noble Plains reported initial results from eight holes with a >87% hit ratio and an average GT of 1.0 from the Duck Creek drill program.

How many holes and total footage is the Duck Creek program planned for under Noble Plains (NBLXF)?

The program is permitted for up to ~150 holes and 37,400 ft of drilling.

What are the average thickness and grade reported by Noble Plains for the first Duck Creek holes?

The first seven mineralised holes averaged 17.6 ft intercepts at 0.057% eU3O8.

Does Noble Plains plan a formal resource for Duck Creek and when (NBLXF)?

Yes; the company aims to prepare a NI 43‑101 compliant resource estimate in H1 2026.

What caveats did Noble Plains give about the reported eU3O8 grades (NBLXF)?

Grades are based on gamma probe eU3O8 readings and may not equal laboratory uranium concentrations if disequilibrium exists.

How do the initial Duck Creek results compare to the company's previous exploration target (NBLXF)?

The reported average GT of 1.0 is about 67% higher than the 0.598 GT used for the upper case of the prior exploration target.