NexGen Energy Ltd. - >>> The Arrow uranium deposit is the world’s largest undeveloped high-grade uranium resource, located in the Athabasca Basin, Saskatchewan, Canada, and fully owned by NexGen Energy Ltd.
Overview and Location
The Arrow deposit is situated within the Rook I Project in the southwestern Athabasca Basin, approximately 130 km north of La Loche and 640 km northwest of Saskatoon, Saskatchewan. It lies on Treaty 8 territory and the Métis Homeland, and is hosted entirely in basement crystalline rocks beneath the Athabasca Supergroup sandstones. Mineralization occurs from roughly 100 m below surface to depths of 950 m.
Ownership and Development
NexGen Energy Ltd. holds 100% ownership of the Arrow deposit and surrounding claims, having consolidated previous interests including Rio Tinto’s carried interest. The project is being developed as an underground mine with a surface mill and an underground tailings management facility (UGTMF) designed to safely store all processed waste. The Canadian Nuclear Safety Commission approved the Environmental Assessment and issued a Licence to Prepare Site and Construct in March 2026, allowing construction to begin later in the year.
Geological Characteristics
Arrow is a basement-hosted, unconformity-related uranium deposit with high-grade mineralization. The deposit occurs along a NE-SW-trending structural corridor known as the Patterson Lake corridor, controlled by brittle-ductile fault systems and reactivated shear zones. Uranium occurs primarily as uraninite (UO2), with secondary phases including coffinite and uranyl oxy-hydroxides. Structural reactivation and hydrothermal fluid migration have been key in forming the high-grade mineralization.
Resource Estimates
Measured and Indicated Resources: 357 million pounds U3O8 at 3.10% grade
Probable Mineral Reserves: 240 million pounds U3O8 at 2.37% grade
Feasibility Study Highlights: Average annual production of 28.8 million pounds U3O8 over a 10.7-year mine life, with an after-tax NPV of CAD 3.47 billion and IRR of 52.4% at US$50/lb U3O8
High-grade core: The A2 sub-zone contains exceptionally high uranium concentrations, with some drill holes showing off-scale radioactivity.
Mining and Processing
The project is designed for conventional long-hole stope underground mining, with a nominal mill capacity of 1,300 tonnes per day. The Arrow deposit’s high rock strength and low hydraulic conductivity allow for efficient underground extraction without the need for freezing, and the ore has clean metallurgy, simplifying surface processing. Tailings will be stored underground in mined-out stopes or purpose-built chambers, minimizing environmental impact.
Arrow is recognized as the largest undeveloped high-grade uranium deposit globally, comparable to top Athabasca Basin mines like McArthur River and Cigar Lake. Its high-grade core, strategic location, and fully consolidated ownership make it a key asset for NexGen Energy and a significant contributor to future global nuclear fuel supply.
Investing News Network
Exploration and Future Potential
The deposit remains open along strike and at depth, with ongoing exploration aimed at expanding resources. NexGen has conducted extensive geotechnical, hydrogeological, and environmental studies since 2013 to optimize development and ensure sustainable operations. The project also emphasizes ESG commitments, including community partnerships and environmental stewardship.
<<<
---
AI
Market Data 
Markets 
