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NexGen Extends Arrow Discovery Zone. Second Hole Intersects Several Highly Anomalous Radioactive Zones, Rook I West, SW Athabasca Basin

VANCOUVER, BRITISH COLUMBIA -- (Marketwired) -- 03/13/14 -- Highlights


--  Second drill hole at the "Arrow" Prospect, Rook I west area intersects
    several radioactive zones

--  Multiple sections of high cps total count gamma spectrometer readings
    including one zone totaling 15.05 meters (containing several intercepts
   greater than 10,000cps) of radioactive anomalism

--  Arrow mineralised zone is currently extended to a minimum 32 meters down
    dip across two holes

--  Structural interpretation validated

NexGen Energy Ltd. (TSX VENTURE: NXE) ("NexGen" or the "Company") is pleased to announce the discovery of further new zones of uranium mineralisation within a second hole (RK-14-27) in the Arrow prospect, Rook 1 project in the SW Athabasca Basin, extending the known zone of uranium mineralisation down dip and along strike.

The first hole at Arrow, RK-14-21 (as previously reported on Sedar, February 24, 2014), was completed at 663.0m. It intersected uranium-mineralised brecciated structural zones over several zones downhole, including 26.2m from 204.8-231.0m, 0.6m from 318.5-319.1m, 26.8m from 517.9-544.5m, and 4.0m from 580.0-584.0m. Four further holes have been completed at Arrow (holes RK-14-24, -25, -26, and -27) (see Figure 1).

The most recent hole, RK-14-27, was completed to a depth of 576m. It intersected uraniferous structurally-disturbed zones similar to the zones in hole RK-14-21, and interpreted to be continuations of those zones. These include downhole radioactively anomalous intercepts in RK-14-27 of 0.25m from 224.45-224.70m, 15.05m from 240.65-255.70m (Figs 2 and 3), 1.25m from 359.20-360.45m, and 0.20m from 435.70-435.90m.

Andrew Browne, NexGen's Vice-President, Exploration and Development, commented, "The structural interpretation of uranium mineralised zones at Arrow has been validated. We are greatly encouraged by this confirmation of both along strike and down dip extensions, and by the preliminary thickness and strength of the radioactivity. Further drilling at Arrow is designed to continue to confirm the strike and dip extent of this newly discovered uranium mineralised prospect."

Leigh Curyer, NexGen's CEO commented, "Andrew Browne, James Sykes and Matthew Schwab (the core NexGen technical team) have done a terrific job in only the 5 holes drilled to date at Arrow. The arrival of a third drill rig for the summer program will significantly expedite the results and potential of Arrow and the other identified geophysical targets on the western section of Rook I."

As previously reported, the Arrow zone is structurally complex, with a range of basement lithologies having variable competency contrast. Hole 21 suffered a deviation from its planned trace apparently due to a combination of boulders in the glacial overburden and foliated basement. Holes RK-14-24, -25, and -26 were planned and drilled to ascertain the orientation of the dominant mineralised structures. While no major radiometric zones were intersected, analysis of structures in these holes meant that hole -27 was successfully planned to intersect the interpreted mineralised zones both along strike and down dip. The next follow up hole, RK-14-29, is planned a further 40m SW along strike to again intersect the interpreted mineralised Arrow zones.

Hole RK-14-27 has been probed radiometrically, using a Mt Sopris 2PGA-1000 total count natural gamma scintillometer probe (Fig 4). The significant radioactive zones have been measured using a hand-held Radiation Solutions Inc RS-125 spectrometer (Table 1), and this has confirmed that all radiometric activity is due to uranium. Currently, NexGen defines "significant" as a minimum of 5cm greater than 500 cps (counts per second). Note that the Radiation Solutions RS-125 spectrometer now used for core scanning is a different instrument to the Exploranium GR-110 previously used. The RS-125 spectrometer has a larger detector crystal than the Exploranium GR-110, but the total count gamma scan readings in counts per second (cps) are in the same range and it is used for qualitative indications of radioactive anomalism.

As in hole RK-14-21, the host lithology throughout most of hole RK-14-27 comprises variably chloritised medium/coarse-grained quartz-garnet-feldspar gneiss, with localized graphitic zones, shearing, brecciation, minor silicification, local dravitic clay veins, and clay alteration. All mineralised zones are being sampled for chemical analysis.

Hole RK-14-28 is in progress, and is designed to intersect the cause of the gravity low at Arrow.

To view Figures 1-4, please visit the following link: http://media3.marketwire.com/docs/933100_F1-4.pdf.


              Table 1 Radioactively anomalous zones in RK-14-27

----------------------------------------------------------------------------
                             Interval
              From       To        (m            Min            Max
Hole           (m)      (m) downhole)            cps            cps Comments
----------------------------------------------------------------------------
RK-14-27    224.45   224.70      0.25  less than 500            600     0.25
----------------------------------------------------------------------------
RK-14-27    239.45   239.70      0.25  less than 500            600     0.25
----------------------------------------------------------------------------
RK-14-27    240.65   241.00      0.35            800           1000     2.35

RK-14-27    241.00   241.20      0.20           1000           2500
RK-14-27    241.20   241.55      0.35  less than 500           1000
RK-14-27    241.55   241.70      0.15           1000           1300
RK-14-27    241.70   242.00      0.30  less than 500           1000
RK-14-27    242.00   242.10      0.10           1400           1700
RK-14-27    242.10   242.30      0.20           1800           2400
RK-14-27    242.30   242.40      0.10           1100           1300
RK-14-27    242.40   242.55      0.15           1800           2000
RK-14-27    242.55   242.70      0.15           3000           3500
RK-14-27    242.70   242.85      0.15            550            650
RK-14-27    242.85   243.00      0.15  less than 500            550
                           -------------------------------------------------
RK-14-27    243.00   243.30      0.30                 less than 500
                           -------------------------------------------------
RK-14-27    243.30   243.40      0.10  less than 500            700     12.4

RK-14-27    243.40   243.75      0.35  less than 500            600
RK-14-27    243.75   243.85      0.10            600            700
RK-14-27    243.85   244.05      0.20            750            850
RK-14-27    244.05   244.20      0.15           1250           1500
                                                       greater than
RK-14-27    244.20   244.35      0.15           6100         10,000
                                        greater than   greater than
RK-14-27    244.35   244.50      0.15         10,000         10,000
RK-14-27    244.50   244.60      0.10           1700           2600
RK-14-27    244.60   244.80      0.20           1500           2100
RK-14-27    244.80   244.95      0.15           2200           3200
RK-14-27    244.95   245.15      0.20           3000           4500
RK-14-27    245.15   245.40      0.25           5500           7000
RK-14-27    245.40   245.50      0.10           4000           4500
RK-14-27    245.50   245.55      0.05            950           1200
RK-14-27    245.55   245.65      0.10            850            950
RK-14-27    245.65   245.95      0.30           1500           1800
RK-14-27    245.95   246.00      0.05           1000           1200
RK-14-27    246.00   246.20      0.20           2200           3000
RK-14-27    246.20   246.40      0.20           1100           1300
RK-14-27    246.40   246.55      0.15            800           1000
RK-14-27    246.55   246.85      0.30            500            850
RK-14-27    246.85   246.95      0.10           1000           1350
RK-14-27    246.95   247.15      0.20           1700           2000
RK-14-27    247.15   247.30      0.15           3500           4500
RK-14-27    247.30   247.50      0.20           6000           7000
                                                       greater than
RK-14-27    247.50   247.90      0.40           8000         10,000
RK-14-27    247.90   248.10      0.20           2500           4000
RK-14-27    248.10   248.30      0.20           3000           4200
RK-14-27    248.30   248.65      0.35           2500           3600
                                                      greater than
RK-14-27    248.65   248.85      0.20           9000         10,000
                                        greater than   greater than
RK-14-27    248.85   249.00      0.15         10,000         10,000
RK-14-27    249.00   249.20      0.20           1000           1300
RK-14-27    249.20   249.35      0.15           1400           1800
RK-14-27    249.35   249.45      0.10           4000           5000
RK-14-27    249.45   249.65      0.20           5500           8000
RK-14-27    249.65   249.75      0.10           3700           5200
RK-14-27    249.75   249.85      0.10           5500           9000
                                        greater than   greater than
RK-14-27    249.85   250.05      0.20         10,000         10,000
                                        greater than   greater than
RK-14-27    250.05   250.25      0.20         10,000         10,000
RK-14-27    250.25   250.35      0.10            900           1000
RK-14-27    250.35   250.65      0.30           1300           2000
RK-14-27    250.65   250.70      0.05           1000           1150
RK-14-27    250.70   250.85      0.15            850           1000
RK-14-27    250.85   250.95      0.10            700            750
RK-14-27    250.95   251.25      0.30            550            700
RK-14-27    251.25   251.55      0.30            800           1100
RK-14-27    251.55   251.65      0.10           2000           3000
RK-14-27    251.65   251.80      0.15           2500           4000
                                        greater than   greater than
RK-14-27    251.80   252.00      0.20         10,000         10,000
                                                       greater than
RK-14-27    252.00   252.40      0.40           7000         10,000
                                        greater than   greater than
RK-14-27    252.40   252.50      0.10         10,000         10,000
                                        greater than   greater than
RK-14-27    252.50   252.65      0.15         10,000         10,000
                                                       greater than
RK-14-27    252.65   252.95      0.30           7000         10,000
RK-14-27    252.95   253.15      0.20           4000           8000
                                                       greater than
RK-14-27    253.15   253.30      0.15           8000         10,000
                                        greater than   greater than
RK-14-27    253.30   253.40      0.10         10,000         10,000
                                        greater than   greater than
RK-14-27    253.40   253.50      0.10         10,000         10,000
                                        greater than   greater than
RK-14-27    253.50   253.95      0.45         10,000         10,000
RK-14-27    253.95   254.05      0.10            800           1200
                                        greater than   greater than
RK-14-27    254.05   254.15      0.10         10,000         10,000
                                        greater than   greater than
RK-14-27    254.15   254.25      0.10         10,000         10,000
RK-14-27    254.25   254.35      0.10           4000           5000
                                                       greater than
RK-14-27    254.35   254.50      0.15           7500         10,000
RK-14-27    254.50   254.70      0.20           2100           3600
RK-14-27    254.70   254.85      0.15            800           1200
RK-14-27    254.85   255.00      0.15            600            750
RK-14-27    255.00   255.70      0.70  less than 500            550
----------------------------------------------------------------------------
---------------------------
RK-14-27    260.40   260.55      0.15  less than 500            650     0.15
----------------------------------------------------------------------------
----------------------------------------------------------------------------
RK-14-27    359.20   359.55      0.35  less than 500            600     0.35
                           -------------------------------------------------
RK-14-27    359.55   360.00      0.45                 less than 500
                           -------------------------------------------------
RK-14-27    360.00   360.45      0.45            550            800     0.45
----------------------------------------------------------------------------
----------------------------------------------------------------------------
RK-14-27    435.70   435.90      0.20            600            700      0.2
----------------------------------------------------------------------------
   (i) "Anomalous" means min 5cm at less than 500 cps (counts per second)

      (ii) Total count gamma readings by gamma spectrometer type RS-125

Natural gamma radiation in drill core reported in this news release was measured in counts per second (cps) using a Radiation Solutions Inc RS-125 gamma-ray spectrometer, and a Mt Sopris 2PGA-1000 natural gamma probe. The reader is cautioned that total count gamma readings may not be directly or uniformly related to uranium grades of the rock sample measured; they should be used only as a preliminary indication of the presence of radioactive minerals. All intersections are downhole. Core interval measurements and true thicknesses are yet to be determined.

Qualified Person

Andrew Browne, FAusIMM(CP), NexGen's Vice President, Exploration & Development, is a "qualified person" for the purposes of National Instrument 43-101 - Standards of Disclosure for Mineral Projects, and has reviewed and approved the contents of this news release.

About NexGen

NexGen is a British Columbia corporation with a focus on the acquisition, exploration and development of Canadian uranium projects. NexGen has a highly experienced team of exploration professionals with a track record in the discovery of unconformity-style uranium deposits in Canada.

NexGen owns a portfolio of highly prospective uranium exploration assets in the Athabasca Basin, Saskatchewan, Canada, including, an option to earn a 70% interest in the Radio Project, immediately adjacent to Rio Tinto's Roughrider Deposit and a 100% interest in Rook 1, immediately adjacent to the north east of Patterson Lake South.

The TSXV has neither approved nor disapproved the contents of this press release. Neither the TSXV nor its Regulation Services Provider (as that term is defined in the policies of the TSXV) accepts responsibility for the adequacy or accuracy of this release.

Forward-Looking Information

This news release contains "forward-looking information" within the meaning of applicable Canadian securities laws. Generally, but not always, forward looking information is identifiable by the use of words such as "will" and planned" and similar expressions. Forward-looking information is based on the then current expectations, beliefs, assumptions, estimates and forecasts about the Company's business and the industry and markets in which it operates. Such information is not a guarantee of future performance and undue reliance should not be placed on forward-looking information. Assumptions and factors underlying the Company's expectations regarding forward-looking information contained herein include, among others: that general business and economic conditions will not change in a material adverse manner; that financing will be available if and when needed on reasonable terms; that the Company's current exploration activities can be achieved and that its other corporate activities will proceed as expected; that third party contractors, equipment and supplies and governmental and other approvals required to conduct the Company's planned exploration activities will be available on reasonable terms and in a timely manner.

Although the assumptions made by the Company in providing forward-looking information are considered reasonable by management at the time the forward-looking information is given, there can be no assurance that such assumptions will prove to be accurate. Forward-looking information also involves known and unknown risks and uncertainties and other factors, which may cause actual events or results in future periods to differ materially from any projections of future events or results expressed or implied by such forward-looking information, including, among others: risks related to the availability of financing on commercially reasonable terms and the expected use of the proceeds; changes in the market; potential downturns in economic conditions; industry conditions; actual results of exploration activities being different than anticipated; changes in exploration programs based upon results of exploration; future prices of metal; availability of third party contractors; availability of equipment and supplies; failure of equipment to operate as anticipated; accidents, effects of weather and other natural phenomena and other risks associated with the mineral exploration industry; environmental risks; changes in laws and regulations; community relations; and delays in obtaining governmental or other approvals or financing. There can be no assurance that forward-looking information will prove to be accurate, as actual results and future events could differ materially from those anticipated, estimated or intended. NexGen undertakes no obligation to update or reissue forward-looking information as a result of new information or events except as required by applicable securities laws. The reader is cautioned not to place undue reliance on forward-looking information.

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