Noble Plains Uranium Secures Duck Creek Project in Heart of Powder River Basin Uranium District

Over 4,000 Historic Drill Holes Outline 3-Mile Uranium Trend in One of America's Most Prolific ISR Districts

Vancouver, British Columbia--(Newsfile Corp. - June 19, 2025) - Noble Plains Uranium Corp. (TSXV: NOBL) (OTCQB: IXIXF) (FSE: INE0) ("Noble Plains" or the "Company") is pleased to announce that it has entered into a property option agreement to acquire an 80% interest in the Duck Creek Project ("Duck Creek Property", "Duck Creek", the "Project", or the "Property"), a strategically located brownfield uranium asset in Wyoming's highly productive Powder River Basin.

The Project spans 4,133 acres (6.5 square miles) of mineral rights and is directly surrounded by a cluster of major in-situ recovery ("ISR") uranium resources and operations—including those held by Uranium Energy Corp., Cameco Corporation, and GTI Energy Limited (see Figure 1). These neighboring operations, together with the Project's dense historical drill coverage and shallow roll-front mineralization, strongly support the prospectivity and strategic value of Duck Creek.

"Duck Creek sits in the heart of a proven uranium district and is backed by an enormous amount of historical drilling, giving us high confidence in the geological potential," said Drew Zimmerman, President of Noble Plains. "This is exactly the kind of brownfield project we target—shallow mineralization, extensive data, and near existing infrastructure. It aligns with our goal of building out pounds in the ground quickly and efficiently to provide shareholders real leverage to the uranium market."

The Property includes 78 lode mining claims (1,573 acres) and four State of Wyoming mineral leases (2,560 acres). Importantly, the Project hosts a 3-mile-long corridor of high-density drilling completed by Kerr-McGee Nuclear Corporation in the 1970s. A total of 4,068 historical drill holes outline a consistent, shallow roll-front uranium system within the Eocene-aged Wasatch Formation, with mineralization occurring from less than 50 feet to 260 feet below surface. Surface features also show evidence of historic open-pit production from these same mineralized zones (see Figure 2).

"The Powder River Basin is reasserting its importance as a centre of U.S. uranium production," added Paul Cowley, CEO of Noble Plains. "Our review of the historic dataset for Duck Creek confirmed not only the continuity of near-surface mineralization, but also significant upside in the untested deeper Fort Union Formation which hosts resources and production from many of our neighbours. It's a rare combination of near-term development potential and meaningful exploration upside."