VANCOUVER, BC, March 24, 2025
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.
Table 1: 2025 Spectrometer results as of March 13
| Drillhole | Unconformity | Handheld Spectrometer Results (RS-125) | ||||||
| Hole ID | Azimuth | Dip | Total | From | To (m) | Width | 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 |
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