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

  • 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 /CNW/ - 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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