NexGen Announces Best Hole (RK-24-207) to Date and Material Expansion of Mineralized Zone at Patterson Corridor East
NexGen Announces Best Hole (RK-24-207) to Date and Material Expansion of Mineralized
Zone at Patterson Corridor East
Vancouver, BC, August 8, 2024 – NexGen Energy Ltd. ("NexGen" or the "Company") (TSX: NXE)
(NYSE: NXE) (ASX: NXG) is pleased to announce the mineralized zone at Patterson Corridor East (PCE)
has materially expanded since the original discovery in the 2024 Winter Program (see NexGen News
Release dated March 11, 2024) . The Summer Drill Program commenced May 21st, with eight (8) out of
twelve (12) drillholes intersecting mineralization to date (Figures 1 and 2, Table 1). Extensive mineralization
plunges to the east with a span of 540 m along strike and 600 m vertical extent, showing wide intervals of
elevated radioactivity that remain open at depth and along strike. In comparison, previously reported holes
from PCE had identified two mineralized holes, 275 m apart.
Off-scale (>61,000 cps) high-grade uranium mineralization has been intersected in four drillholes to date,
including RK-24-183, -197, -202, and -207. The most recent intersection in RK -24-207 contains the first
instance of massive replacement by uraninite, a key indicator of a strongly mineralized system (Figures 3
and 4, Table 1) with 1.5 m >10,000 cps (inc luding 0.3 m >61,000 cps) within cumulative interval
mineralization of 26.2 m > 500 cps (Table 2).
Results include the best and most recent intercept in RK-24-207, that confirms continuity of mineralization,
massive replacement uranium and significant high grade at PCE (Table 1) . The high -intensity style
mineralization is indicative of exceptional formation conditions linked to significant orebodies within the
Athabasca Basin and most notably the Arrow Deposit 3.5 km to the west. In addition, this zone of high -
intensity mineralization in RK-24-207 is at a similar depth to Arrow’s A2 high-grade heart. PCE, like Arrow,
is contained solely in the competent basement rock which is the ideal underground setting. The mineralized
signature is expressed as very analogous to Arrow, localized veins (up to off-scale >61,000 cps ) within
elevated radioactivity that extends over more than 100 m.
Summer drilling to date totals 10,045.5 m of the planned 22,000 m from 12 completed drillholes. Assays
from disclosed mineralized intersections are pending and due in Q4 2024.
As a consequence of these results, the focus of the summer program has substantially elevated with two
primary objectives:
- continue to test the extent of the mineralized system through bold step outs, and
- vector in on the high-grade zones within the broader mineralized system.
Leigh Curyer, Chief Executive Officer, commented: “ In the first two months of the summer program , the
results have rapidly indicated an expansive, mineralized footprint with remarkable continuity. Geological
characteristics are very analo gous to Arrow indicating a large, pervasive and high -grade system. The
summer program has been purposely bold with very large drill step outs and has intersected mineralization
in an additional 8 of the 12 holes drilled. Important to note, PCE has currently hit 4 holes with intense
mineralization >61,000 cps, with this occurring at Arrow for the first time in the 15 th hole - which led to
subsequently delineating broad ultra-high grade zones in the A2 shear of Arrow.
Discoveries of the calibre of Arrow all take their own path in terms of time and extent of drilling to fully
define. PCE is now commencing its path showing all the characteristics of Arrow at the same stage . PCE
validates the continued prospectivity of the NexGen land package is immense and underpins the southwest
Athabasca Basin as the future of Canada’s uranium industry growth over the balance of this century.
NexGen is at an incredibly exciting stage , focused on concluding the Federal Environmental Assessment
for the Rook I Project, construction readiness on receipt of final approvals and in parallel drilling a newly
discovered zone of mineralization.”
Mineralization is hosted as semi -massive to massive pitchblende veins, fracture coatings, and
disseminations. Structures focus the mineralization via reactivated shears and faults while competent wall
rock (silicified orthogneiss) acts as a physical trap. The mineralization and alteration patterns depict a well-
developed hydrothermal fluid system. Typical alteration associated with the mineralization includes the
formation of iron -rich minerals ( hydrothermal hematite ), iron oxide (limonite), clay, and chlorite. These
characteristics combined with the size of the mineralized footprint, as well as the presence of >61,000 cps,
demonstrates the similarities between PCE and Arrow at the same stage.
Figure 1: Schematic plan view of mineralized footprint at Arrow and PCE at the same stage of drilling; gravity as
background with low values in blue
Figure 2: Schematic long section of mineralized footprint at Arrow and PCE at the same stage of drilling
Figure 3: Core photo from RK-24-207; high grade mineralization is hosted across 7.1 m from 523.9 to 531 m with
outer low grade disseminated uranium extending above to 519.4 and below to 534.4 m; Narrow secondary veins are
hosted nearby in the footwall below
Figure 4: RK-24-207 close-up of off-scale (>61,000 cps) massive replacement by uraninite at 525.1 m
Figure 5: RK-24-202 uraninite as blebs along foliation and fracture coating at 934.4 m, max peak of >61,000 cps
Figure 6: RK-24-202 mineral replacement by uraninite within shear zone at 967.5 m, max peak of 49,000 cps
Table 1: 2024 Summer program spectrometer results to date
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-24-195 310 -70 588.0 N/A 171.5 172.0 0.5 <500 - 1,500
172.0 172.5 0.5 <500
192.0 192.5 0.5 <500
216.0 216.5 0.5 <500
RK-24-196 310 -70 841.0 103.4 701.5 703.0 1.5 <500
703.0 703.5 0.5 1,600 - 2,500
703.5 704.0 0.5 <500
704.0 704.5 0.5 570 - 1,320
705.5 706.0 0.5 <500 - 520
723.5 724.0 0.5 <500 - 600
731.0 731.7 0.7 <500
731.7 731.8 0.1 3,380 - 4,180
731.8 731.9 0.1 10,000 - 14,000
731.9 732.0 0.1 <500
732.0 732.1 0.1 <500 - 3,100
732.5 736.5 4.0 <500 - 3,100
741.0 741.5 0.5 <500 - 4,000
742.5 743.0 0.5 <500 - 1,000
744.5 745.0 0.5 <500
745.0 745.5 0.5 <500 - 1,350
745.5 746.0 0.5 <500
746.0 746.5 0.5 <500 - 520
746.5 747.0 0.5 <500 - 530
747.0 748.0 1.0 <500
748.5 749.0 0.5 <500
749.5 750.0 0.5 <500 - 3,200
750.0 750.5 0.5 <500 - 2,100
757.0 757.5 0.5 <500 - 2,350
758.0 758.5 0.5 <500
760.0 760.5 0.5 <500
765.5 766.6 1.1 <500
RK-24-197 310 -70 792.0 117.7 241.0 241.5 0.5 <500
518.0 521.5 3.5 <500
523.5 524.0 0.5 <500
524.0 524.5 0.5 <500 - 990
524.5 525.0 0.5 <500 - 2990
525.0 525.5 0.5 <500 - 2510
525.5 526.0 0.5 <500 - 660
526.0 526.4 0.4 <500 - 10,000
526.4 526.6 0.2 10,000 - 13,050
526.6 527.0 0.4 510 - 6,550
527.0 527.5 0.5 1,040 - 9,560
527.5 527.6 0.1 9,580 - 10,000
527.6 527.8 0.2 10,000 - 26,400
527.8 528.5 0.7 <500
528.5 528.8 0.3 940 - 10,000
528.8 528.9 0.1 10,000 - 46,400
528.9 529.0 0.1 865 - 2,250
529.0 529.5 0.5 <500
530.5 535.5 5.0 <500
536.0 536.5 0.5 <500
546.0 546.5 0.5 <500
546.5 547.0 0.5 <500
547.0 547.5 0.5 <500 - 670
547.5 548.0 0.5 <500
548.0 548.5 0.5 <500 - 890
548.5 548.6 0.1 1,000 - 8,200
548.6 548.8 0.2 21,200 - 33,800
548.8 549.0 0.2 42,600 - 52,800
549.0 549.5 0.5 600 - 1,500
549.5 550.0 0.5 2,200 - 4,400
550.0 550.5 0.5 <500 - 1,600
550.5 551.0 0.5 <500
551.0 551.5 0.5 <500 - 620
551.5 552.0 0.5 <500 - 550
552.0 552.5 0.5 1,300 - 2,000
552.5 552.6 0.1 25,000 - 32,000
552.7 552.9 0.2 40,100 - >61,000
552.9 553.0 0.1 17,100 - 25,000
553.0 553.5 0.5 <500 - 1,500
RK-24-198 310 -70 743.2 117.3 333.5 334.0 0.5 <500
669.5 670.0 0.5 <500
RK-24-199 310 -70 807.0 107.1 No Significant Intersections
RK-24-200 310 -70 804.0 112.6 339.0 339.5 0.5 <500
354.0 354.5 0.5 <500 - 750
465.5 466.0 0.5 <500 - 600
611.0 611.5 0.5 <500 - 660
612.0 612.5 0.5 <500
613.0 613.5 0.5 <500 - 970
619.0 619.5 0.5 <500 - 510
619.5 620.0 0.5 <500
623.0 623.5 0.5 <500
RK-24-201 310 -70 939.0 108.9 412.5 413.0 0.5 <500
673.5 674.0 0.5 <500
674.5 675.0 0.5 <500
675.0 675.5 0.5 <500 - 3,800
675.5 676.0 0.5 <500
677.5 678.0 0.5 <500 - 550
678.5 679.0 0.5 650 - 700
679.0 679.5 0.5 <500
680.0 681.0 1.0 <500
693.5 694.0 0.5 700 - 800
694.0 695.0 1.0 <500
695.0 695.5 0.5 700 - 900
695.5 696.0 0.5 <500
696.0 696.5 0.5 500 - 1,800
696.5 697.0 0.5 500 - 2,600
697.0 699.0 2.0 <500
699.5 700.5 1.0 <500
700.5 701.0 0.5 650 - 700
701.0 701.5 0.5 <500 - 550
701.5 702.0 0.5 <500 - 600
702.0 702.5 0.5 <500 - 750
703.0 703.5 0.5 <500
708.0 709.0 1.0 <500
721.5 722.0 0.5 <500
741.0 741.5 0.5 <500
765.5 766.0 0.5 <500 - 1300
819.0 819.5 0.5 <500 - 1800
822.5 823.0 0.5 <500 - 630
837.5 838.0 0.5 <500
867.5 868.0 0.5 <500
RK-24-202 310 -70 1138.2 106.3 622.5 623.0 0.5 <500
623.5 624.0 0.5 <500
732.0 732.5 0.5 <500
780.5 781.0 0.5 <500
846.0 850.3 4.3 <500
886.0 886.2 0.2 <500 - 1,780
886.2 886.3 0.1 10,000 - 14,100
886.3 886.5 0.2 <500 - 1,700
887.5 888.0 0.5 <500 - 1,300
895.5 896.0 0.5 <500 - 3,200
907.0 908.0 1.0 <500
922.5 923.0 0.5 <500 - 650
926.5 927.0 0.5 <500
928.0 928.5 0.5 <500 - 540
931.0 931.5 0.5 <500 - 3,400
931.5 932.0 0.5 <500 - 1,050
932.0 932.5 0.5 <500 - 650
933.5 934.0 0.5 <500 - 2,580
934.0 934.3 0.3 <500 - 6,100
934.3 934.4 0.1 55,500 - >61,000
934.4 934.5 0.1 <500
936.0 936.3 0.3 <500
936.3 936.4 0.1 12,000 - >61,000
936.4 936.5 0.1 530 - 650
943.5 944.0 0.5 <500 - 2,290
944.0 944.5 0.5 <500 - 800
947.0 947.5 0.5 <500
948.5 949.0 0.5 <500
951.0 951.5 0.5 <500
951.5 951.7 0.2 850 - 3,200