NexGen Drills Massive Pitchblende at South Arrow
NexGen Drills Massive Pitchblende at South Arrow
Vancouver, BC, October 18, 2017 – NexGen Energy Ltd . (“NexGen” or the “Company”) (TSX:NXE,
NYSEMKT:NXE) is pleased to report radioactivity results for sixteen holes from South Arrow as part of our on-
going summer drilling program on our 100% owned, Rook I property, in the Athabasca Basin, Saskatchewan.
South Arrow
Aggressive step out drilling at the recently discov ered South Arrow has intersected significant off-scale
radioactivity in multiple holes , and has extended the strike length and vertical extent of high grade
mineralization to 240 m and 185 m , respectively . High grade uranium mineralization occurs as accumulations
of semi-massive to massive pitchblende similar to that seen in the High Grade Domains of the Arrow Deposit.
• AR-17-166c1 (250 m up-dip and southwest of discovery hole AR-17-151c1) intersected 41.0 m of total
composite mineralization including 6.2 m of total composite off-scale radioactivity (>10,000 to
>61,000 cps) within a 54.0 m section (182.5 to 236. 5 m). This is the shallowest significant off-scale
mineralization encountered anywhere on the Rook I property .
• AR-17-160c1 (203 m up-dip and southwest of discovery hole AR-17-151c1) intersected 30.0 m of
total composite mineralization including 3.5 m of total composite off-scale radioactivity (>10,000
to >61,000 cps) within a 157.0 m section (192.0 to 349.0 m).
• AR-17-163c1 (190 m up-dip and southwest of discovery hole AR-17-151c1) intersected 23.0 m of total
composite mineralization including 2.2 m of total composite off-scale radioactivity (>10,000 to
>61,000 cps) within a 109.5 m section (162.5 to 272.0 m).
Two diamond drill rigs remain in operation at South Arrow as the Company continues to aggressively and
systematically test this encouraging new zone. A total of eighteen assays remain pending.
A South Arrow longitudinal section and plan map with drill hole locations are shown in Figures 1 and 2.
Garrett Ainsworth, Vice-President, Exploration and Development, commented: “Drill hole AR-17-160c1
represents a highly successful 203 m step out to the southwest from the initial discovery hole at South Arrow.
The ability to hit high grade mineralization on an aggressive step out of this distance has been a com mon
characteristic of the Arrow Deposit, which is locat ed 400 m to the north of South Arrow on a separate
conductor. South Arrow contains a broad alteration halo that surrounds multiple parallel stacked mineralized
zones, which are two important features observed at the Arrow Deposit. Hole AR-17-166c1 at South Arro w
has encountered the shallowest significant high gra de mineralization anywhere on the Rook I property t o
date.”
Leigh Curyer, Chief Executive Officer, commented: “ The scale of these South Arrow results are very exc iting
considering its very early in the discovery stage. They are unprecedented on the Rook I property and highlight
the vast discovery potential of our dominant portfolio in the Southwest Athabasca Basin. An additional 5,000m
of drilling has been allocated to South Arrow before the conclusion of the 2017 drilling program.”
Figure 1: South Arrow Mineralized Long Section
Figure 2: South Arrow Drill Hole Locations
Table 1: South Arrow Drill Hole Data
Drill Hole
Athabasca
Group -
Basement
Unconformity
Depth (m)
Handheld Scintillometer Results (RS-120)
Hole ID
Azimuth
(From
Surface)
Dip
(From
Surface)
Total
Depth
(m)
From (m) To (m) Width (m) CPS Range
AR-17-151c3 327 -70 405.00 103.30 280.5 281.5 1 <500 - 18000
290.5 292.5 2 <500 - 980
AR-17-152c1 327 -70 456.50 96.40 294.5 296 1.5 <500 - 1000
302.5 303 0.5 <500 - 810
AR-17-152c2 327 -70 540.50 96.40 333 337.5 4.5 <500 - 3300
341 342 1 <500 - 860
387.5 388 0.5 <500 - 520
405.5 406 0.5 <500 - 520
470.5 471 0.5 <500 - 540
481 482 1 <500 - 2200
AR-17-153c1 327 -67 546.00 97.80 373 373.5 0.5 500 - 3000
388.5 389 0.5 <500 - 730
391.5 393.5 2 <500 - 1100
414 417 3 <500 - 21000
454.5 455 0.5 <500 - 750
AR-17-153c2 327 -67 558.50 97.80 411 420 9 <500 - 6300
AR-17-157c1 327 -70 597.50 N/A 385 385.5 0.5 <500 - 530
388.5 389 0.5 <500 - 1300
396 396.5 0.5 <500 - 540
488 488.5 0.5 <500 - 530
528 528.5 0.5 <500 - 570
531.5 532 0.5 <500 - 800
AR-17-157c2 327 -70 639.00 N/A 400.5 402 1.5 <500 - 900
535.5 536 0.5 <500 - 700
543 544.5 1.5 <500 - 1800
547 548 1 <500 - 780
561.5 564.5 3 <500 - 680
577.5 579 1.5 <500 - 2690
AR-17-158c1 327 -70 600.00 N/A 438.5 439 0.5 <500 - 610
445 445.5 0.5 <500 - 950
452.5 460.5 8 <500 - 1750
AR-17-158c2 327 -70 579.50 N/A 486.5 488.5 2 <500 - 1450
496 497 1 <500 - 800
522.5 523 0.5 <500 - 600
AR-17-160c1 327 -68 393.00 97.60 192 211 19 <500 - 48000
223.5 233.5 10 <500 - >61000
241.5 242 0.5 <500 - 530
348.5 349 0.5 <500 - 3600
AR-17-162c1 315 -68 442.50 96.80 145 145.5 0.5 <500 - 1100
156 162 6 <500 - 56000
178.5 179 0.5 <500 - 970
199 200 1 <500 - 2200
254.5 256.5 2 <500 - 15000
AR-17-163c1 315 -68 438.00 96.15 162.5 163 0.5 <500 - 810
241.5 262.5 21 <500 - >61000
270.5 272 1.5 <500 - 4650
AR-17-165c1 315 -80 249.00 91.40 116 118 2 <500 - 5800
AR-17-166c1 310 -70 303.00 N/A 182.5 200.5 18 <500 - 42200
213.5 236.5 23 <500 - >61000
AR-17-168c1 315 -68 471.00 N/A 315 316.5 1.5 <500 - 2700
AR-17-169c1 315 -68 345.00 N/A 134.5 135 0.5 <500 - 630
138.5 144 5.5 <500 - >61000
152 153.5 1.5 <500 - 15000
Parameters:
• Maximum internal dilution 2.00 m downhole
• All depths and intervals are metres downhole, true thicknesses are yet to be determined
• "Anomalous" means >500 cps (counts per second) total count gamma readings by gamma scintillometer type RS-120
• "Off-scale" means >10,000 cps (counts per second) total count gamma readings by gamma scintillometer type RS-120
• Where "Min cps" is <500 cps, this refers to local low radiometric zones within the overall radioactive interval
• Directional drilling has often resulted in mineralization intersected at a more favourable and shallower dip
South Arrow Drilling
AR-17-151c3
Hole AR-17-151c3 was a directional hole that depart ed pilot hole AR-17-151c1 at a depth of 123 m. It w as
designed to test the South Arrow zone 30 m above AR-17-151c1. Directional drilling was initiated at 144 m and
the mineralized horizons were intersected at an inclination of -61°. Basement lithologies were intersected from
the top of hole and dominantly consisted of semi-pelitic gneiss and orthogneiss of variable composition. Several
broad deformation zones were encountered throughout. Extensive zones of hydrothermal alteration were also
intersected which generally consisted of replacemen t- and hydrothermal breccia-style clay, chlorite an d
silicification. The hole intersected visible disseminated, and foliation-controlled pitchblende mineralization in
close association with deformation and hydrothermal alteration. A total composite mineralization of 3. 0 m
including 0.15 m of off-scale radioactivity (>10,00 0 to 18,000 cps) was intersected within a 12.0 m se ction
(280.5 to 292.5 m) before the hole was terminated at 405 m.
AR-17-152c1
Hole AR-17-152c1 was a directional hole collared from surface at an angled orientation (-70°) to the northwest
(327° azimuth). It was designed to test the South A rrow zone 40 m southwest of AR-17-151c1. Directiona l
drilling was initiated at 132 m and the mineralized horizons were intersected at an inclination of -58°. The hole
intersected Athabasca Group sandstones between 91.3 m and the unconformity at 96.4 m. Basement
lithologies consisted of semi-pelitic gneiss and orthogneiss of variable composition. Several broad deformation
zones were encountered throughout. Extensive zones of hydrothermal alteration were also intersected which
generally consisted of replacement- and hydrotherma l breccia-style clay, chlorite and silicification. The hole
intersected disseminated and fracture-hosted pitchblende mineralization in close association with deformation
and hydrothermal alteration. A total composite mineralization of 2.0 m was intersected between 294.5 m and
303.0 m. The hole was terminated at 456.5 m.
AR-17-152c2
Hole AR-17-152c2 was a directional hole that depart ed pilot hole AR-17-152c1 at 148 m. It was designed to
test the South Arrow zone 50 m below AR-17-152c1. D irectional drilling was initiated at 159 m and the
mineralized horizons were intersected at an inclina tion of -68°. Basement lithologies were intersected from
the top of the hole that included semi-pelitic gnei ss and orthogneiss of variable composition. Several broad
deformation zones were encountered throughout. Exte nsive zones of hydrothermal alteration were also
intersected which generally consisted of replacemen t- and hydrothermal breccia-style clay, chlorite an d
silicification. The hole intersected disseminated a nd fracture-hosted pitchblende mineralization in cl ose
association with deformation and hydrothermal alter ation. A total composite mineralization of 8.0 m wa s
intersected within a 149.0 m section (333.0 to 482.0 m) before the hole was terminated at 540.5 m.
AR-17-153c1
Hole AR-17-153c1 was a directional hole collared from surface at an angled orientation (-67°) to the northwest
(327° azimuth). It was designed to test South Arrow zone 50 m down-dip from AR-17-151c2. Directional drilling
was initiated at 126 m and the mineralized horizons were intersected at an inclination of -61°. The ho le
intersected Athabasca Group sandstones between 94.9 m and the unconformity at 97.8 m. Basement
lithologies consisted of semi-pelitic gneiss and orthogneiss of variable composition. Several broad deformation
zones were encountered throughout. Extensive zones of hydrothermal alteration were also intersected which
generally consisted of replacement- and hydrotherma l breccia-style clay, chlorite and silicification. The hole
intersected visible disseminated, fracture-hosted, foliation-controlled, and mineral replacement style
pitchblende mineralization in close association wit h deformation and hydrothermal alteration. A total
composite mineralization of 6.5 m including 0.55 m of off-scale radioactivity (>10,000 to 21,000 cps) was
intersected within an 82.0 m section (373.0 to 455.0 m). The hole was terminated at 546 m.
AR-17-153c2
Hole AR-17-153c2 was a directional hole that depart ed pilot hole AR-17-152c1 at 294 m. Directional dri lling
was initiated at 126 m and the mineralized horizons were intersected at an inclination of -69°. It was designed
to test the South Arrow zone 50 m down-dip of AR-17-153c1. Basement lithologies were intersected from the
top of the hole that included semi-pelitic gneiss a nd orthogneiss of variable composition. Several bro ad
deformation zones were encountered throughout. Exte nsive zones of hydrothermal alteration were also
intersected which generally consisted of replacemen t- and hydrothermal breccia-style clay, chlorite an d
silicification. The hole intersected disseminated a nd fracture-hosted pitchblende mineralization in cl ose
association with deformation and hydrothermal alteration. Continuous mineralization of 9.0 m was intersected
between 411 and 420 m before the hole was terminated at 558.5 m.
AR-17-157c1
Hole AR-17-157c1 was a directional hole collared from surface at an angled orientation (-70°) to the northwest
(327° azimuth). It was designed to test the South Arrow zone 50 m down-dip of AR-17-152c2. Directional drilling
was initiated at 198 m and the mineralized horizons were intersected at an inclination of -66°. The ho le
intersected Devonian-aged sandstones between 87.9 m and 93.7 m. No Athabasca Group sandstones were
encountered. Basement lithologies consisted of semi -pelitic gneiss and orthogneiss of variable composi tion.
Several broad deformation zones were encountered th roughout. Extensive zones of hydrothermal alteratio n
were also intersected which generally consisted of replacement- and hydrothermal breccia-style clay, chlorite
and silicification. The hole intersected disseminat ed and fracture-hosted pitchblende mineralization i n close
association with deformation and hydrothermal alter ation. A total composite mineralization of 3.0 m wa s
intersected within a 147.0 m section (385.0 to 532.0 m) before the hole was terminated at 597.5 m.
AR-17-157c2
Hole AR-17-157c2 was a directional hole that depart ed pilot hole AR-17-157c1 at 203 m. It was designed to
test the South Arrow zone down-dip of AR-17-157c1. Directional drilling was initiated at 264 m and the
mineralized horizons were intersected at an inclina tion of -70°. Basement lithologies were intersected from
the top of the hole that included semi-pelitic gnei ss and orthogneiss of variable composition. Several broad
deformation zones were encountered throughout. Exte nsive zones of hydrothermal alteration were also
intersected which generally consisted of replacemen t- and hydrothermal breccia-style clay, chlorite an d
silicification. The hole intersected disseminated a nd fracture-hosted pitchblende mineralization in cl ose
association with deformation and hydrothermal alter ation. A total composite mineralization of 9.0 m wa s
intersected within a 178.5 m section (400.5 to 579.0 m) before the hole was terminated at 639.0 m.
AR-17-158c1
Hole AR-17-158c1 was a directional hole collared from surface at an angled orientation (-70°) to the northwest
(327° azimuth). It was designed to test the South A rrow zone 50 m down-dip and northeast of AR-17-153c 2.
Directional drilling was initiated at 150 m and the mineralized horizons were intersected at an inclination of -
65°. The hole intersected Cretaceous-aged mudstone between 71.8 m and 90.8 m. Basement lithologies
consisted of semi-pelitic gneiss and orthogneiss of variable composition. Several broad deformation zo nes
were encountered throughout. Extensive zones of hyd rothermal alteration were also intersected which
generally consisted of replacement- and hydrotherma l breccia-style clay, chlorite and silicification. The hole
intersected disseminated and fracture-hosted pitchblende mineralization in close association with deformation
and hydrothermal alteration. A total composite mineralization of 9.0 m was intersected within a 22.0 m section
(438.5.0 to 460.5 m) before the hole was terminated at 600.0 m.