Noble Plains Uranium Achieves 87% Success Rate with Strong Initial Drill Results from First Eight Holes at Duck Creek Project in Wyoming
Noble Plains Uranium Achieves 87% Success Rate with Strong Initial Drill Results
from First Eight Holes at Duck Creek Project in Wyoming
December 1, 2025 – Vancouver, British Columbia – Noble Plains Uranium Corp. (TSX -V: 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 r esults 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 th ere
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” hole s
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 t hese 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
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 extr action. 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", "esti mate", "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 res ource
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.sedar plus.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.
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policies of the TSX Venture Exchange) accept responsibility for the adequacy or accuracy of this release.