Noble Plains Uranium Secures Strategic Ground IN Heart of Shirley Basin Uranium District
NOBLE PLAINS URANIUM SECURES STRATEGIC GROUND
IN HEART OF SHIRLEY BASIN URANIUM DISTRICT
June 3, 2025 – Vancouver, British Columbia – Noble Plains Uranium Corp. (TSX -V: NOBL, OTCQB: IXIXF,
FSE: INEN) (“Noble Plains” or the “ Company”) is pleased to announce that it has secured an option to
acquire a 100% interest in 30 highly strategic mineral claims collectively called the Shirley Central Property
in the prolific Shirley Basin of Wyoming, a historically productive and infrastructure rich uranium district
in the United States.
Several of the Shirley Central Property claims lie directly within Ur -Energy Inc.’s Shirley Basin permit
boundary, while others are surrounded by Uranium Energy Corp’s (UEC) land package —placing Noble
Plains in the middle of a rapidly developing uranium hub. Ur -Energy Inc.’s Shirley Basin Project currently
hosts a National Instrument 43-101 compliant Measured (1,367,000 short tons) and Indicated (549,000
short tons) Resource of 8.816 million pounds U₃O₈ at 0.23%1 and is under active construction2.
“This acquisition is a clear reflection of our strategy —targeting sound geological projects in premier U.S.
uranium jurisdictions,” stated Drew Zimmerman, President of Noble Plains. “We’re focused on acquiring
brownfield assets with proven potential and strong ISR amenability, and this new land package in the
Shirley Basin is a prime example.”
Figure 1: Shirley Central Property Acquisition Map
The Company has obtained, digitized, and interpreted historical aerial photos and records to reveal at
least five distinct areas of dense, systematic drilling within the Shirley Central Property as conducted by
past operators, such as Kerr-McGee (see Figure 1). These were drilled between former producing open -
pit mines, targeting uranium mineralization with denser grid spacing (25m by 25m) designed to delineate
higher-grade zones. Historic exploration density strongly suggests high -confidence targets for future ISR
resource delineation. Noble Plains plans to fast -track permitting to begin drilling on these “bullseye”
targets by late summer 2025.
“The Shirley Basin is very well-understood geologically and in a historically productive uranium district in
the United States,” said Paul Cowley, CEO of Noble Plains. “This land package sits between past-producing
open pits and has dense historical drilling with clear signs of mineralization that make it an exceptional
geological opportunity with five “bullseye” targets already identified for drill testing.”
The Shirley Central Property adds to the Company’s Shirley East Property (aka Hot Property), expanding
Noble Plains’ Shirley Basin footprint to a total of 101 unpatented mineral claims covering 8.44 km² (3.26
mi²), consolidating the Company’s position in a premier U.S. uranium district (see Figure 2).
Figure 2: Noble Plains’ Properties in Shirley Basin (pink and red)
Shirley Basin
Wyoming is the top uranium-producing state in the U.S. and hosts the country's largest ore reserves. The
Shirley Basin alone produced over 52 million pounds of U₃O₈ between 1960 and 1992 at an average grade
of 0.22% U₃O₈ —over three times the current U.S. average.
With ISR now the dominant method of uranium production in Wyoming, these newly optioned claims are
especially compelling. ISR offers lower capital and operating costs, minimal surface disturbance, and no
tailings—aligning with Noble Plains’ commitment to environmentally responsible development.
1 Updated Initial Assessment Technical Report Summary on Shirley Basin ISR Uranium Project, Carbon County
Wyoming, USA dated March 4, 2024 and prepared by Western Water Consultants, Inc.
2 Ur-Energy Announces Decision to Build Out Shirley Basin Mine: Press Release dated March 13, 2024
Terms of Transaction
The Company has signed a property option agreement (the “Agreement”) effective June 1, 2025, with a
private vendor pursuant to which the Company can acquire a 100% interest in the Shirley Central Property.
Pursuant to the Agreement, the Company will pay US$50,000 annually to the vendor. Between the third
anniversary of the effective date of the Agreement and a construction decision, the Company can exercise
the option to own a 100% interest in the Shirley Central Property subject to a 3% gross value royalty. At
that time, annual option payments of US$50,000 convert to an annual US$50,000 milestone payment. The
Shirley Central Property option transaction is considered an Exempt Transaction, as such term is defined
in the policies of the Exchange and, thus, does not require Exchange approval.
On Behalf of the Board of Directors,
“Paul Cowley”, CEO
For further information, please contact: Paul Cowley: (604) 340-7711
Website: www.nobleplains.com
Bradley Parkes, P .Geo., VP Exploration and Director 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 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 the speculative nature of mineral exploration and
development, fluctuating commodity prices, competitive risks and the availability of financing, as described
in more detail in our recent securities filings availa ble at www.sedar.com. 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
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