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NexGen Reports First Assays From Winter Program: Drills Most Continuous High-Grade Uranium Intercept over 2% U3O8 in the A2 Shear at the Arrow Zone

Vancouver, BC – NexGen Energy Ltd. (TSX-V:NXE) ("NexGen" or the "Company") is pleased to report the assay results for the first four drill holes (angled holes AR-15-33, -34b, and -35, and vertical hole AR-15-36) from the ongoing winter 2015 program at the Arrow zone on the 100% owned Rook I property, Athabasca Basin, Saskatchewan. The results include those from angled drill hole AR-15-34b, which shows continuous, broad, high-grade uranium mineralization within the A2 mineralized shear. Assays are presented in Table 1, a plan map of the Arrow zone is shown in Figure 1, cross and long sections highlighting AR-15-34b are shown in Figures 2 and 3, respectively.

Highlights:

Angled holes

• AR-15-34b assays 70.0 m at 2.2% U3O8 (522.0 to 592.0 m) including 11.0 m at 8.95% U3O8 (560.5 to 571.5 m);
• AR-15-35 assays 18.5 m at 0.33% U3O8 (394.5 to 413.0 m), and 12.0 m at 0.49% U3O8 (553.5 to 565.5 m);

Vertical hole

• AR-14-36 assays 51.0 m at 0.32% U3O8 (167.0 to 218.0 m);

The Arrow Zone is currently 515 m x 215 m with the vertical extent of mineralization commencing from 100 m and extending down to 820 m. It remains open in all directions and at depth.

Garrett Ainsworth, NexGen’s Vice-President, Exploration and Development, commented “This first set of assays from the winter 2015 drill program at the Arrow zone have exceeded our expectations. The A2 mineralized shear continues to impress us with what is now our widest high grade interval returned to date from angled drill hole AR-15-34b. The high grade uranium core associated with the A2 structure within Arrow is centered on drill hole AR-14-30 (see October 6th, 2014 news release), and is developing at a staggering pace with this important 30 m step-out to the southwest.“

Leigh Curyer, CEO commented, “AR-15-34b is the broadest continuous intercept greater than 2% U3O8 to date. Drilling at Arrow will continue to define this high grade zone within the A2 shear and in parallel test the newly discovered high grade zone within the A3 shear (see press release dated February 24, 2015).”

Click here to view tables and figures.

Composite parameters:

• Minimum thickness 0.5 m downhole
• Cutoff grade 0.01% U3O8 (weight %)
• Maximum internal dilution 2.00 m downhole
• U3O8 analyzed by ICP-OES at SRC laboratories, Saskatoon
• All depths and intervals are meters downhole

Split core samples were taken systematically, and intervals were submitted to SRC Geoanalytical Laboratories (an SCC ISO/IEC 17025: 2005 Accredited Facility) of Saskatoon for analysis. All samples were analyzed using ICP-MS for trace elements on the partial and total digestions, ICP-OES for major and minor elements on the total digestion, and fusion solution of boron by ICP-OES. Mineralized samples were analyzed for U3O8 by ICP OES and gold by fire assay.

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