Drill holes, AR-14-31 and -32, were 15m step outs to the northeast and southwest along strike from AR-14-30.
The AR-14-32 drill hole intersected 123.9m total composite mineralization including 10.13m off-scale radioactivity within a 343.45m section.
The AR-14-31 drill hole intersected 107.9m total composite mineralization within a 460.35m section.
NexGen completed the 2014 summer drill program totalling 18,885.8m in 33 drill holes on the Rook I property.
The company said drilling at the Arrow zone has delineated mineralization over a strike length of 515 m, a width of 215 m, and a depth extent of 650 m, which remains open in all directions.
Additional drilling is planned in winter 2015 to continue to delineate and expand the Arrow zone.
NexGen vice president of exploration and development Garrett Ainsworth said: "Drill holes AR-14-31 and -32 conclude NexGen’s tremendously successful summer drill campaign with advancing the Arrow zone.
"These last two holes have extended the strike length of robust mineralization from AR-14-30, which intersected the strongest and densest accumulations of high grade mineralization to date. After only 32 drill holes we have confirmation that the Arrow zone is a significant showing in the southwest Athabasca, which is located on land and within competent basement rocks."
