NexGen Energy has detected mineralization with significant step-outs at Arrow Zone on its Rook I uranium property in Athabasca Basin, Saskatchewan, Canada.

The Arrow zone covers an area of 645m by 215m with a vertical extent of mineralization starting from 100 to 920m, and it remains open in all directions.

The company has detected mineralization at all five holes and the strike lengths of the high grade cores in the A2 and A3 shears have been tripled to about 300m and 295m, respectively.

AR-15-48c3 intersected 170.5m of total composite mineralization including 13.2 m of off-scale radioactivity within a 530.5m section.

NexGen intersected 160.25 m of total composite mineralization including 8m of off-scale radioactivity within a 462.5m section at AR-15-51.

The company has also intersected composite mineralization at several other sections.

NexGen Energy vice-president of exploration and development Garrett Ainsworth said: "Our bold objective that contemplated 50, 100, and 200 m step outs to the southwest of the A2 and A3 high grade cores have resulted in wide zones of mineralization across both shears with all three of these step outs encountering off-scale radioactivity.

"We are very pleased to be witnessing such strong continuity of mineralization, and consistent growth with these aggressive southwest step outs."