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NexGen Energy Ltd.

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Summary

Project:

Rook I

Deposit:Arrow
Location:Canada
Commodities:Uranium
Date:6/7/2017
Report Code:NI43-101
Report Type:Exploration/Drilling Update
Project Stage:Pursuing Resource Increase/Upgrade
Report details:7-6-2017: NexGen Energy Ltd. announces an Exploration/Drilling Update report for its Arrow deposit at the Rook I project. Drilling results incl. 22.5m @ <500 ->61000cps from 805.5m (handheld scintillometer readings). Vancouver, BC, June 7, 2017 – NexGen E
Resources:(Resource): 1.18Mt @ 6.88% U3O8 (Ind.) and 4.25Mt @ 1.30% U3O8 (Inf.) at Arrow
CP/QP:[Overall Report]: Garrett Ainsworth (Internal)
ABSTRACT:Vancouver, BC, June 7, 2017 – NexGen Energy Ltd. (“NexGen” or the “Company”) (TSX:NXE, NYSE:NXE) is pleased to report radioactivity results for the final sixteen holes of the winter 2017 drilling program at our 100% owned, Rook I property, Athabasca Basin, Saskatchewan. Significant off-scale radioactivity continues to be encountered in the gap area near the southwest margin of the Arrow Deposit. The Southwest Gap represents a material resource expansion opportunity as it was not included in the March 2017 updated mineral resource estimate. Drilling northeast of the Arrow Deposit between the mineral resource domains and mineralized drill holes not included in the updated mineral resource estimate continues to return significant mineralization and off-scale radioactivity. In addition, the Company is pleased to announce the identification of visible pitchblende mineralization located 300 m southeast of the Arrow Deposit. Exploration hole RK-17-118w1 intersected 0.5 m of anomalous radioactivity measuring a maximum of 1,300 cps at 490.5 m down-hole. This new occurrence of anomalous radioactivity is located on an Arrow-parallel conductive feature where significant sections of stacked hydrothermal alteration and graphitic shear zones were intersected in the only two holes drilled in the area. Mineralized hole RK-17-118w1 was the last hole drilled prior to the termination of the winter program.

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