NexGen Announces Best Ever Discovery-Phase Intercept At Rook I Property

Company news release Source: Cision
24 March 2025, 6:30 a.m. EDT
  • RK-25-232 intersects broad zone of intense mineralization including 3.9 m of >61,000 cps
  • High-grade subdomain doubles in size to 210 m strike and 335 m vertical extent
  • Represents best hole drilled at any NexGen property, including Arrow, during the discovery-phase of exploration

VANCOUVER, BC, March 24, 2025 /PRNewswire/ - NexGen Energy Ltd. ("NexGen" or the "Company") (TSX: NXE) (NYSE: NXE) (ASX: NXG) is excited to announce the best hole drilled to date, RK-25-232 (Figures 1 and 2). This hole has materially expanded the shallow inner high-grade subdomain at Patterson Corridor East (PCE).

Drillhole RK-25-232 intersected 3.9 meters ("m") of >61,000 cps, indicating rich uranium concentration within a larger 13.8 m mineralized interval that starts at 452.2 m (Figures 3 and 4, Table 1). It is one of the shallowest high-grade intersections at PCE and open in all directions (including 300 m up dip) within the competent basement rock. Four additional winter drillholes all located a minimum 50 m from RK-25-232 have all encountered high-grade intercepts containing >61,000 cps (RK-25-227, -230, -233, -236) expanding the high-grade subdomain to 210 m along strike and 335 m of vertical extent, doubling in size since last reported in November 2024 (previously 100 m strike and 170 m vertical extent). Ongoing exploration will focus on growing and defining this high-grade zone from hole RK-25-232.

Leigh Curyer, Chief Executive Officer, commented: "This intercept from RK-25-232 is geologically exceptional and represents a transformational moment taking PCE into a category to rival Arrow at the same stage of drilling. Discovering mineralization of this intensity so early in our 2025 program outpaces the success pattern experienced at the Arrow Deposit. Incredible, considering Arrow's status on the world stage. To put this into context, the width of high-grade intense mineralization in RK-25-232 at PCE was first encountered at Arrow well into the delineation phase of resource definition. Together with Arrow, it's validation a very significant regional mineralizing event has occurred at Rook I that we are only just beginning to assess the magnitude.

Today's result comes at a time the need for Canada to optimize the development of its energy fuel resources has never been more important. NexGen, Saskatchewan and our community partners are ready to immediately commence construction of the Rook I Project subject to the completion of the CNSC approval process."

Jason Craven, Vice President, Exploration, commented: "Another exciting evaluation milestone has been achieved by intersecting the surge of mineralization intensity in RK-25-232. Vein-type uranium is known to have high-grade zones within broad, structurally controlled footprints. Our focus is to expand the high-grade subdomain while also investigating for natural repetition within the evolving mineralized footprint, all of which is very similar to the approach to Arrow's resource development."

The development of PCE has advanced quickly over the past year; from an initial discovery of new vein-type basement-hosted uranium in February 2024, to a rapidly growing mineralized footprint and expanding high-grade, and now to a best-ever high-grade intersection in RK-25-232. An interpreted 3D model (Figures 1 and 2) provides a new visual representation of the scale and setting of the mineralization.

Reporting of assays from 2024 is expected in April once all results have been received and verified.

Figure 1: Interpreted model of mineralization at PCE (as of this release) and same exploration stage of the A2 shear mineralization from Arrow (as of Spring 2015); both are shown on long sections that look perpendicular to their primary mineralized planes; total mineralized footprint in orange and the high-grade subdomains in red; 2019 Feasibility Study notes 174.2 Mlbs U3O8 measured and indicated hosted by final A2 (CNW Group/NexGen Energy Ltd.)

Figure 2: Zoomed view of RK-25-232 and surrounding pierce points on the long section, significant space to be tested in all directions (CNW Group/NexGen Energy Ltd.)

Figure 3: Core photo of mineralization from RK-25-232; off-scale high-grade mineralization is near continuous within an overall vein width of 13.8 m from 452.2 to 466.0 m; yellow outlines >1,000 cps, red outlines >10,000 cps, purple outlines >61,000 cps (CNW Group/NexGen Energy Ltd.)

Figure 4: Massive replacement by uranium mineralization at 460.6 m in RK-25-232; examples of this intense mineralization style are spread throughout the high-grade subdomain (CNW Group/NexGen Energy Ltd.)

Table 1: 2025 Spectrometer results as of March 13

Drillhole

Unconformity

Depth (m)

                                Handheld Spectrometer Results (RS-125)                                           

Hole ID

Azimuth

Dip

Total

Depth (m)

From

(m)

To (m)

Width

(m)

CPS Range

RK-25-225

330

-70

684.0

108.6

475.00

475.5

0.5

 <500











479.5

480.0

0.5

 <500 - 1400











482.0

482.5

0.5

 <500 - 850











482.5

483.0

0.5

 <500











483.5

484.0

0.5

 <500











484.0

484.5

0.5

 <500











484.5

485.0

0.5

 <500











498.5

499.0

0.5

 <500 - 650











499.0

499.5

0.5

 <500 - 830











509.0

509.5

0.5

 <500 - 1300











509.5

510.0

0.5

 <500











510.5

511.0

0.5

 <500 - 750











511.0

511.5

0.5

 <500 - 1800











517.5

518.0

0.5

 <500











523.0

523.5

0.5

 <500











523.5

524.0

0.5

 <500











526.5

527.0

0.5

 <500











539.0

539.5

0.5

 <500











539.5

540.0

0.5

 <500











540.0

540.5

0.5

 <500











541.0

541.5

0.5

 <500 - 1600











541.5

542.0

0.5

 <500

RK-25-226

330

-70

655.5

N/A

539.0

539.5

0.5

 <500











540.5

541.0

0.5

 <500 - 550











578.5

579.0

0.5

 <500











579.5

580.0

0.5

 <500











580.0

580.5

0.5

 <500 - 880











580.5

581.0

0.5

 <500 - 510











582.0

582.5

0.5

 <500











583.0

583.5

0.5

 <500











583.5

584.0

0.5

 <500 - 2200











584.0

584.5

0.5

 <500 - 980











586.5

587.0

0.5

 <500











587.0

587.5

0.5

 <500











589.0

589.5

0.5

 <500











589.5

590.0

0.5

 <500











590.0

590.5

0.5

 <500











590.5

591.0

0.5

 <500 - 730











591.0

591.5

0.5

 <500 - 720











591.5

592.0

0.5

 <500











592.0

592.5

0.5

 <500 - 1200











592.5

593.0

0.5

 <500 - 1280











593.0

593.5

0.5

 <500 - 1150











594.0

594.5

0.5

 <500 - 890











594.5

595.0

0.5

 <500











595.0

595.5

0.5

1000 - 5400











595.5

596.0

0.5

 <500











596.0

596.5

0.5

 <500











597.5

598.0

0.5

 <500











598.0

598.5

0.5

 <500 - 770











598.5

599.0

0.5

 <500 - 1600











599.0

599.5

0.5

 <500











599.5

600.0

0.5

 <500 - 510











600.0

600.5

0.5

 <500 - 710











602.0

602.5

0.5

 <500











606.0

606.5

0.5

 <500

RK-25-227

330

-70

657.0

113.4

493.0

493.5

0.5

 <500











496.0

496.5

0.5

 <500











496.5

497.0

0.5

 <500











497.5

498.0

0.5

 <500 - 950











498.0

498.5

0.5

 <500











505.5

506.0

0.5

 <500 - 650











506.0

506.5

0.5

 <500 - 2300











506.5

507.0

0.5

 <500 - 650











507.0

507.5

0.5

 <500 - 1500











507.5

508.0

0.5

 <500 - 1250











508.0

508.5

0.5

 <500











508.5

509.0

0.5

 <500 - 1400











509.0

509.5

0.5

 <500 - 2500











509.5

510.0

0.5

 <500











510.5

511.0

0.5

 <500











511.0

511.5

0.5

 <500











511.5

512.0

0.5

 <500











512.5

513.0

0.5

 <500











513.5

514.0

0.5

 <500











514.0

514.5

0.5

 <500











514.5

515.0

0.5

 <500











515.0

515.5

0.5

 <500 - 1600











515.5

516.0

0.5

 <500











516.0

516.5

0.5

800 - 2000











516.5

517.0

0.5

600 - 2000











517.0

517.5

0.5

700 - 3000











517.5

518.0

0.5

1200 - 5700











518.0

518.5

0.5

1500 - 4500











518.5

519.0

0.5

1000 - 4500











519.0

519.5

0.5

 <500 - 1500











519.5

520.0

0.5

 <500 - 800











520.0

520.5

0.5

1000 - 14000











520.5

521.0

0.5

500 - 1300











521.0

521.5

0.5

1000 - 3000











521.5

522.0

0.5

800 - 3000











522.0

522.5

0.5

1500 - 5000











522.5

523.0

0.5

 <500 - 4000











523.0

523.5

0.5

 <500 - 600











523.5

524.0

0.5

 <500 - 900











524.0

524.5

0.5

 <500











533.0

533.5

0.5

 <500











533.5

534.0

0.5

 <500 - 1200











534.0

534.5

0.5

1200 - 1200











534.5

535.0

0.5

700 - 950











535.0

535.5

0.5

950- 1600











535.5

536.0

0.5

1200 - 4200











536.0

536.5

0.5

1200 - 6100











536.5

537.0

0.5

600 - 1600











537.0

537.5

0.5

3000 - 14000











537.5

538.0

0.5

>61000











538.0

538.1

0.1

45000 - 55000











538.1

538.5

0.4

>61000











538.5

539.0

0.5

850 - 6500











539.0

539.1

0.1

900 - 1200











539.1

539.2

0.1

25000 - 55000











539.2

539.5

0.3

20000 - 37000











539.5

539.6

0.1

>61000











539.6

539.7

0.1

25000 - 55000











539.7

540.0

0.3

>61000











540.0

540.5

0.5

1700 - 6500











540.5

541.0

0.5

800- 1400











541.0

541.5

0.5

 <500 - 900











541.5

542.0

0.5

 <500











542.0

542.5

0.5

 <500 - 1200











542.5

543.0

0.5

 <500 - 1200











543.0

543.5

0.5

 <500 - 1600











544.0

544.5

0.5

600 - 3800











544.5

545.0

0.5

 <500 - 9400











545.0

545.5

0.5

 <500











552.0

552.5

0.5

 <500 - 1500











552.5

553.0

0.5

 <500 - 700











553.0

553.5

0.5

 <500











562.0

562.5

0.5

 <500











562.5

563.0

0.5

<500 - 600











563.0

563.5

0.5

 <500











563.5

564.0

0.5

 <500

RK-25-228

330

-75

609.0

117.1

493.0

493.5

0.5

 <500











494.5

495.0

0.5

 <500 - 800











495.5

496.0

0.5

 <500











508.0

508.5

0.5

 <500











537.5

538.0

0.5

 <500 - 700











545.5

546.0

0.5

 <500 - 3000











561.5

562.0

0.5

 <500











562.0

562.5

0.5

 <500

RK-25-229

350

-70

681.4

113.2

570.0

570.5

0.5

 <500











570.5

571.0

0.5

 <500











571.0

571.5

0.5

 <500











573.5

574.0

0.5

 <500











576.5

577.0

0.5

 <500











578.0

578.5

0.5

 <500











578.5

579.0

0.5

 <500 - 700











582.0

582.5

0.5

 <500 - 600











606.5

607.0

0.5

 <500 - 30000











607.0

607.5

0.5

 <500 - 19000











607.5

608.0

0.5

 <500 - 3400











622.5

623.0

0.5

 <500 - 2200











623.0

623.5

0.5

 <500 - 1400











633.5

634.0

0.5

 <500











636.5

637.0

0.5

 <500 - 3700

RK-25-230

330

-70

598.0

112.5

441.5

442.0

0.5

 <500- 6700











442.0

442.5

0.5

 <500 - 1800











442.5

443.0

0.5

 <500 - 640











443.0

443.5

0.5

 <500 - 640











446.5

447.0

0.5

 <500











447.0

447.5

0.5

 <500 - 720











447.5

448.0

0.5

 <500 - 1400











448.0

448.5

0.5

<500 - 1800











448.5

449.0

0.5

 <500 - 620











475.0

475.5

0.5

 <500











475.5

476.0

0.5

 <500 - 1700











476.0

476.5

0.5

 <500 - 1660











476.5

477.0

0.5

 <500 - 580











477.0

477.5

0.5

 <500 - 1050











477.5

478.0

0.5

 <500 - 540











478.0

478.5

0.5

 <500 - 1080











479.0

479.5

0.5

 <500 - 710











479.5

480.0

0.5

 <500











480.0

480.5

0.5

 <500











480.5

481.0

0.5

 <500











481.0

481.5

0.5

 <500 - 860











481.5

482.0

0.5

 <500 - 1820











482.0

482.5

0.5

 <500 - 1100











482.5

483.0

0.5

<500 - 2700











483.0

483.5

0.5

 <500 - 10000











483.5

484.0

0.5

 <500 - 520











484.0

484.5

0.5

 <500











484.5

485.0

0.5

 <500 - 1360











485.0

485.5

0.5

 <500 - 1350











485.5

486.0

0.5

680 - 3400











486.0

486.5

0.5

540 - 2500











486.5

487.0

0.5

 <500











487.0

487.5

0.5

 <500 - 4420











487.5

488.0

0.5

740 - 7800











488.0

488.5

0.5

 <500 - 8000











488.5

489.0

0.5

 <500 - 2300











489.0

489.5

0.5

730 - 1900











489.5

490.0

0.5

820 - 7550











490.0

490.5

0.5

 <500 - 1250











490.5

491.0

0.5

 <500











491.0

491.5

0.5

 <500











491.5

492.0

0.5

 <500











492.0

492.5

0.5

 <500











492.5

493.0

0.5

 <500 - 1140











493.0

493.2

0.2

>61000











493.2

493.4

0.2

8000 - 28000











493.4

493.5

0.1

>61000











493.5

494.0

0.5

 <500 - 31000











494.0

494.5

0.5

 <500 - 5100











494.5

495.0

0.5

 <500 - 1160











495.0

495.5

0.5

2200 - 2200











495.5

496.0

0.5

 <500 - 1650











496.0

496.5

0.5

 <500 - 3700











496.5

497.0

0.5

1400 - 2600











497.0

497.5

0.5

 <500 - 4500











497.5

497.7

0.2

540 - 1100











497.7

498.0

0.3

>61000











498.0

498.5

0.5

1200 - 44000











498.5

498.7

0.2

>61000











498.7

499.0

0.3

5200 - 24000











499.0

499.5

0.5

540 - 8000











499.5

500.0

0.5

 <500 - 680

RK-25-231

329

-69.5

885.0

102.7

677.0

677.5

0.5

 <500 - 920











683.0

683.5

0.5

 <500 -1200











683.5

684.0

0.5

 <500 - 1500











684.0

684.5

0.5

580 - 1000











685.0

685.5

0.5

 <500











686.0

686.5

0.5

 <500











686.5

687.0

0.5

 <500 - 4000











687.0

687.5

0.5

 <500











687.5

688.0

0.5

 <500 - 6700











688.0

688.5

0.5

 <500 - 20000











689.0

689.5

0.5

 <500 - 6000











689.5

690.0

0.5

 <500 - 1000











690.0

690.5

0.5

 <500 - 2200











692.5

693.0

0.5

 <500 - 3600











693.0

693.5

0.5

 <500 - 4800











693.5

694.0

0.5

700 - 8100











694.0

694.5

0.5

4200 - 31000











694.5

695.0

0.5

 <500 - 11000











695.0

695.5

0.5

2000 - 21000











695.5

696.0

0.5

2000 - 17000











696.0

696.5

0.5

1200 - 16000











696.5

697.0

0.5

1500 - 6600











697.0

697.5

0.5

600 - 20000











697.5

698.0

0.5

3100 - 11000











698.0

698.5

0.5

3400 - 20000











698.5

699.0

0.5

3700 - 12000











699.0

699.5

0.5

620 - 2400











699.5

700.0

0.5

 <500











701.5

702.0

0.5

 <500











704.0

704.5

0.5

 <500











706.5

707.0

0.5

 <500 - 16000











707.0

707.5

0.5

 <500 - 900











707.5

708.0

0.5

 <500 - 800











708.0

708.5

0.5

 <500 - 8000











708.5

709.0

0.5

700 - 16000











709.0

709.5

0.5

 <500 - 720











709.5

710.5

1.0

 <500











711.5

712.5

1.0

 <500











713.0

714.0

0.5

 <500











716.0

716.5

0.5

 <500 - 15000











716.5

717.0

0.5

 <500 - 2800











725.5

726.0

0.5

 <500 - 9500











729.5

730.0

0.5

 <500 - 1100











731.5

732.0

0.5

 <500-1300











732.0

732.5

0.5

 < 300 - 2300











734.0

734.5

0.5

 <500 - 2300











737.0

737.5

0.5

 <500

RK-25-232

330

-70

501.0

112.5

395.0

395.5

0.5

 <500 - 750











408.0

408.5

0.5

 <500











408.5

409.0

0.5

 <500 - 650











409.5

410.0

0.5

 <500 - 900











411.5

412.0

0.5

 <500 - 700











411.5

412.0

0.5

 <500 - 1100











424.5

425.0

0.5

 <500











426.5

428.0

1.5

 <500











435.5

438.0

2.5

 <500 - 660











444.5

445.5

1.0

 <500 - 500











449.5

450.0

0.5

 <500 - 650











450.5

451.0

0.5

 <500











452.0

452.5

0.5

 <500 - 1100











452.5

453.0

0.5

3200 - 9700











453.0

453.5

0.5

3100 - 7500











453.5

454.0

0.5

900 - 2500











454.5

455.0

0.5

700 - 2300











455.0

455.5

0.5

8300 - 24000











455.5

456.0

0.5

1100 - 2200











456.0

456.5

0.5

1100 - 4800











456.5

457.0

0.5

4400 - 10000











457.0

457.5

0.5

1100 - 17000











457.5

457.8

0.3

24000 - 54000











457.8

458.0

0.2

>61000











458.0

458.1

0.1

32000 - 45000











458.1

460.3

2.2

>61000











460.3

460.5

0.2

1500 - 3400











460.5

460.6

0.1

16000 - 54000











460.6

461.3

0.7

>61000











461.3

461.5

0.2

2500 - 20000











461.5

462.0

0.5

600 -1200











462.0

462.5

0.5

600 - 2700











462.5

463.0

0.5

1200 - 1400











463.0

463.5

0.5

6600 - 34000











463.5

463.6

0.1

16000 - 25000











463.6

463.8

0.2

1200 - 2200











463.8

464.1

0.3

>61000











464.1

464.3

0.2

25000 - 45000











464.3

464.8

0.5

>61000











464.8

465.0

0.2

900 - 1200











465.0

465.3

0.3

1500 - 2500











465.3

465.5

0.2

14000 - 45000











465.5

466.0

0.5

 <500 - 1100











466.0

466.5

0.5

 <500 - 800











466.5

467.0

0.5

 <500 - 5500











467.0

467.5

0.5

 <500











467.5

468.0

0.5

 <500 - 650











468.0

468.5

0.5

 <500











468.5

469.0

0.5

 <500











469.0

469.5

0.5

 <500











469.5

470.0

0.5

 <500











470.0

470.5

0.5

 <500











470.5

471.0

0.5

 <500











471.0

471.5

0.5

 <500











471.5

472.0

0.5

 <500











472.5

473.0

0.5

 <500











480.0

480.5

0.5

 <500











481.5

482.0

0.5

 <500











482.0

482.5

0.5

 <500 - 610











482.5

483.0

0.5

 <500











483.5

484.0

0.5

 <500 - 520











484.0

484.5

0.5

 <500











484.5

485.0

0.5

1100 - 1100











485.0

485.5

0.5

 <500











485.5

486.0

0.5

 <500 - 1400











486.0

486.5

0.5

 <500 - 600











486.5

487.0

0.5

 <500











491.0

491.5

0.5

 <500











491.5

492.0

0.5

 <500











495.5

496.0

0.5

 <500 - 3400











496.0

496.5

0.5

 <500 - 750











496.5

497.0

0.5

 <500 - 700











499.0

499.5

0.5

 <500











499.5

500.0

0.5

 <500 - 1200











500.0

500.5

0.5

 <500 - 1200











500.5

501.0

0.5

 <500











502.0

502.5

0.5

 <500 - 800











502.5

503.0

0.5

900 - 900











503.0

503.5

0.5

 <500 - 650











505.0

505.5

0.5

 <500











509.5

510.0

0.5

 <500











510.0

510.5

0.5

 <500











515.5

516.0

0.5

 <500











516.0

516.5

0.5

 <500

RK-25-233

330

-70

694.0

109.7

561.0

561.5

0.5

 <500 - 600











561.5

562.0

0.5

 <500











562.0

563.5

1.5

 <500











563.5

564.0

0.5

 <500 - 650











564.0

565.0

1.0

 <500











565.0

565.5

0.5

 <500 - 700











565.5

566.0

0.5

 <500











566.0

566.5

0.5

 <500 - 600











566.5

567.0

0.5

 <500











567.0

567.5

0.5

 <500 - 600











567.5

569.5

2.0

 <500











570.0

571.0

1.0

 <500











571.0

571.5

0.5

 <500 - 600











571.5

572.0

0.5

 <500











575.0

575.5

0.5

 <500











576.0

576.5

0.5

 <500 - 1000











576.5

577.0

0.5

 <500 - 600











577.0

577.5

0.5

600 - 1200











577.5

578.0

0.5

 <500 - 1100











578.0

578.4

0.4

1000 - 8500











578.4

578.8

0.4

>61000











578.8

579.0

0.2

600 - 1000











579.0

579.5

0.5

2500 - 11000











579.5

580.0

0.5

2000 - 8000











580.0

580.5

0.5

800 - 15000











580.5

581.0

0.5

500 - 650











581.0

581.5

0.5

 <500 - 600











581.5

582.0

0.5

 <500











582.5

584.0

1.5

 <500











584.0

584.5

0.5

 <500 - 4000











584.5

585.0

0.5

1000 - 4300











585.0

585.5

0.5

2000 - 7000











585.5

586.0

0.5

1500 - 8500











586.0

586.5

0.5

2000 - 6000











586.5

587.0

0.5

20000 - 45000











587.0

587.5

0.5

20000 - 40000











587.5

588.0

0.5

1000 - 17000











588.0

588.5

0.5

500 - 1200











588.5

589.0

0.5

 <500 - 650











589.0

589.5

0.5

700 - 2400











589.5

591.0

1.5

 <500











591.0

591.5

0.5

 <500 - 1000











591.5

592.5

1.0

 <500











592.5

593.0

0.5

 <500 - 650











593.0

593.5

0.5

 <500











593.5

594.0

0.5

 <500 - 600











594.0

594.5

0.5

 <500 - 1200











594.5

595.0

0.5

1200 - 2400











595.0

595.5

0.5

500 - 700











603.0

603.5

0.5

 <500











603.5

604.0

0.5

 <500 - 4500











604.0

604.5

0.5

10000 - 30000











604.5

605.0

0.5

6000 - 13000











605.0

605.5

0.5

700 - 1000











605.5

606.0

0.5

500 - 1300











606.0

606.5

0.5

500 - 1400











606.5

607.0

0.5

 <500











607.0

607.5

0.5

500 - 1500











607.5

608.0

0.5

 <500 - 1300











608.0

609.0

1.0

 <500











609.0

609.5

0.5

 <500











624.5

625.0

0.5

 <500 - 600











625.0

625.5

0.5

 <500 - 1100











625.5

626.0

0.5

 <500 - 550











629.5

630.0

0.5

 <500











630.0

630.5

0.5

 <500 - 750











633.5

634.0

0.5

 <500











634.0

634.5

0.5

 <500 - 550











634.5

635.0

0.5

 <500 - 900











635.0

635.5

0.5

 <500 - 1100











635.5

636.0

0.5

2500 - 5000

RK-25-234

330

-70

747.0

113.0

668.0

668.5

0.5

 <500











672.0

672.5

0.5

 <500 - 1200











672.5

673.0

0.5

 <500 - 630











675.0

675.5

0.5

 <500 -520











675.5

676.0

0.5

 <500











677.0

677.5

0.5

 <500 - 520











677.5

678.0

0.5

 <500











679.5

680.0

0.5

 <500











682.0

682.5

0.5

 <500











685.0

685.5

0.5

 <500











687.0

687.5

0.5

 <500 - 9000











687.5

687.7

0.2

2000 - 14000











687.7

687.8

0.1

>61000











687.8

688.0

0.2

550 - 3300











688.0

688.5

0.5

 <500 - 8800

RK-25-235

270

-70

TBD

105.5

In Progress

RK-25-236

267

-65

541.0

129.0

377.5

379.0

1.5

 <500











379.0

379.5

0.5

 <500 - 600











379.5

380.0

0.5

 <500 - 1100











380.0

380.5

0.5

 <500











380.5

381.0

0.5

870 - 3400











381.0

381.5

0.5

1300 - 4400











381.5

382.0

0.5

 <500 - 1450











382.0

382.5

0.5

 <500











393.0

394.0

1.0

 <500











395.0

396.0

1.0

 <500











396.0

396.5

0.5

 <500 - 1000











396.5

397.0

0.5

600 - 1050











397.0

397.5

0.5

550 - 1180











400.5

401.0

0.5

 <500











401.0

401.5

0.5

560 - 980











401.5

402.0

0.5

2300 - 25000











402.0

402.5

0.5

850 - 1130











402.5

403.0

0.5

 <500 - 2250











404.0

404.5

0.5

 <500











411.0

414.0

3.0

 <500











414.5

415.0

0.5

 <500











427.5

428.0

0.5

 <500 - 570











428.0

428.5

0.5

 <500 - 600











457.5

458.0

0.5

 <500 - 525











458.0

458.5

0.5

 <500 - 720











458.5

459.0

0.5

 <500 - 530











459.0

459.5

0.5

 <500 - 600











459.5

460.0

0.5

 <500











460.0

460.5

0.5

 <500 - 550











461.5

462.0

0.5

 <500











464.0

465.0

1.0

 <500











465.0

465.5

0.5

 <500 - 3000











465.5

466.0

0.5

 <500 -980











466.0

466.5

0.5

900 - 11000











466.5

467.0

0.5

1000 - 5500











467.0

467.5

0.5

3000 - 16000











467.5

467.8

0.3

1300 - 57000











467.8

468.1

0.3

>61000











468.1

468.5

0.4

7000 - 40000











468.5

469.0

0.5

1500 - 9000











469.0

469.5

0.5

2000 - 11000











469.5

470.0

0.5

500 - 800











470.0

470.5

0.5

 <500 - 550











475.5

477.5

2.0

 <500











477.5

478.0

0.5

 <500 - 860











478.0

478.5

0.5

 <500











478.5

479.0

0.5

 <500 - 950











516.5

517.0

0.5

 <500

RK-25-237

340

-70

TBD

104.6

In progress

RK-25-238

279

-67

TBD

TBD

In progress

  • All depths and intervals are meters downhole, true thicknesses are yet to be determined.
  • "Off-scale" refers to >61,000 cps total readings by gamma spectrometer type RS-125.
  • "Anomalous" means >500 cps (counts per second) total count gamma readings by gamma scintillometer type RS-120.
  • Where "CPS Range" is <500 cps, this refers to local low radiometric zones within the overall radioactive interval.
  • Unconformity of 'N/A' denotes a lack of visible contact between Athabasca sandstone and basement rock.
  • Maximum internal dilution 2.0 m downhole.
  • All depths and intervals are metres downhole, true thicknesses are yet to be determined. Resource modelling in conjunction with an updated mineral resource estimate is required before true thicknesses can be determined.

About NexGen

NexGen Energy is a Canadian company focused on delivering clean energy fuel for the future. The Company's flagship Rook I Project is being optimally developed into the largest low-cost producing uranium mine globally, incorporating the most elite environmental and social governance standards. The Rook I Project is supported by an N.I. 43-101 compliant Feasibility Study, which outlines the elite environmental performance and industry-leading economics. NexGen is led by a team of experienced uranium and mining industry professionals with expertise across the entire mining life cycle, including exploration, financing, project engineering and construction, operations and closure. NexGen is leveraging its proven experience to deliver a Project that leads the entire mining industry socially, technically and environmentally. The Project and prospective portfolio in northern Saskatchewan will provide generational, long-term economic, environmental, and social benefits for Saskatchewan, Canada, and the world.   

NexGen is listed on the Toronto Stock Exchange, the New York Stock Exchange under the ticker symbol "NXE," and on the Australian Securities Exchange under the ticker symbol "NXG," providing access to global investors to participate in NexGen's mission of solving three major global challenges in decarbonization, energy security and access to power.  The Company is headquartered in Vancouver, British Columbia, with its primary operations office in Saskatoon, Saskatchewan.

Technical Disclosure*

All technical information in this news release has been reviewed and approved by Jason Craven, NexGen's Vice President, Exploration, a qualified person under National Instrument 43-101.

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 spectrometer. 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.

A technical report in respect of the FS is filed on SEDAR ( www.sedar.com ) and EDGAR (www.sec.gov/edgar.shtml ) and is available for review on NexGen Energy's website (www.nexgenenergy.ca ).

Cautionary Note to U.S. Investors

This news release includes Mineral Reserves and Mineral Resources classification terms that comply with reporting standards in Canada and the Mineral Reserves and the Mineral Resources estimates are made in accordance with NI 43-101. NI 43-101 is a rule developed by the Canadian Securities Administrators that establishes standards for all public disclosure an issuer makes of scientific and technical information concerning mineral projects. These standards differ from the requirements of the Securities and Exchange Commission ("SEC") set by the SEC's rules that are applicable to domestic United States reporting companies.   Consequently, Mineral Reserves and Mineral Resources information included in this news release is not comparable to similar information that would generally be disclosed by domestic U.S. reporting companies subject to the reporting and disclosure requirements of the SEC Accordingly, information concerning mineral deposits set forth herein may not be comparable with information made public by companies that report in accordance with U.S. standards.

Forward-Looking Information

The information contained herein contains "forward-looking statements" within the meaning of applicable United States securities laws and regulations and "forward-looking information" within the meaning of applicable Canadian securities legislation. "Forward-looking information" includes, but is not limited to, statements with respect to mineral reserve and mineral resource estimates, the 2021 Arrow Deposit, Rook I Project and estimates of uranium production, grade and long-term average uranium prices, anticipated effects of completed drill results on the Rook I Project, planned work programs, completion of further site investigations and engineering work to support basic engineering of the project and expected outcomes. Generally, but not always, forward-looking information and statements can be identified by the use of words such as "plans", "expects", "is expected", "budget", "scheduled", "estimates", "forecasts", "intends", "anticipates", or "believes" or the negative connotation thereof or variations of such words and phrases or state that certain actions, events or results "may", "could", "would", "might" or "will be taken", "occur" or "be achieved" or the negative connotation thereof. Statements relating to "mineral resources" are deemed to be forward-looking information, as they involve the implied assessment that, based on certain estimates and assumptions, the mineral resources described can be profitably produced in the future.

Forward-looking information and statements are based on the then current expectations, beliefs, assumptions, estimates and forecasts about NexGen's business and the industry and markets in which it operates. Forward-looking information and statements are made based upon numerous assumptions, including among others, that the mineral reserve and resources estimates and the key assumptions and parameters on which such estimates are based are as set out in this news release and the technical report for the property , the results of planned exploration activities are as anticipated, the price and market supply of uranium, the cost of planned exploration activities, that financing will be available if and when needed and on reasonable terms, that third party contractors, equipment, supplies and governmental and other approvals required to conduct NexGen's planned exploration activities will be available on reasonable terms and in a timely manner and that general business and economic conditions will not change in a material adverse manner. Although the assumptions made by the Company in providing forward looking information or making forward looking statements are considered reasonable by management at the time, there can be no assurance that such assumptions will prove to be accurate in the future.

Forward-looking information and statements also involve known and unknown risks and uncertainties and other factors, which may cause actual results, performances and achievements of NexGen to differ materially from any projections of results, performances and achievements of NexGen expressed or implied by such forward-looking information or statements, including, among others, the existence of negative operating cash flow and dependence on third party financing, uncertainty of the availability of additional financing, the risk that pending assay results will not confirm previously announced preliminary results, conclusions of economic valuations, the risk that actual results of exploration activities will be different than anticipated, the cost of labour, equipment or materials will increase more than expected, that the future price of uranium will decline or otherwise not rise to an economic level, the appeal of alternate sources of energy to uranium-produced energy, that the Canadian dollar will strengthen against the U.S. dollar, that mineral resources and reserves are not as estimated, that actual costs or actual results of reclamation activities are greater than expected, that changes in project parameters and plans continue to be refined and may result in increased costs, of unexpected variations in mineral resources and reserves, grade or recovery rates or other risks generally associated with mining, unanticipated delays in obtaining governmental, regulatory or First Nations approvals, risks related to First Nations title and consultation, reliance upon key management and other personnel, deficiencies in the Company's title to its properties, uninsurable risks, failure to manage conflicts of interest, failure to obtain or maintain required permits and licences, risks related to changes in laws, regulations, policy and public perception, as well as those factors or other risks as more fully described in NexGen's Annual Information Form dated  March 6, 2024 filed with the securities commissions of all of the provinces of Canada except Quebec and in NexGen's 40-F filed with the United States Securities and Exchange Commission, which are available on SEDAR at www.sedar.com and Edgar at www.sec.gov .

Although the Company has attempted to identify important factors that could cause actual results to differ materially from those contained in the forward-looking information or statements or implied by forward-looking information or statements, there may be other factors that cause results not to be as anticipated, estimated or intended.  Readers are cautioned not to place undue reliance on forward-looking information or statements due to the inherent uncertainty thereof.

There can be no assurance that forward-looking information and statements will prove to be accurate, as actual results and future events could differ materially from those anticipated, estimated or intended. Accordingly, readers should not place undue reliance on forward-looking statements or information. The Company 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.

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SOURCE NexGen Energy Ltd.