IsoEnergy Intersects 5.4% U3O8 over 7.0m in Drill Hole LE19‐16A, Including 15.9% U3O8 over 2.0m
IsoEnergy Intersects 5.4% U3O8 over 7.0m in Drill Hole LE19‐16A,
Including 15.9% U3O8 over 2.0m
Vancouver, BC, July 25, 2019 – IsoEnergy Ltd. (“ IsoEnergy” or the “ Company”) (TSXV: ISO; OTCQX: ISENF ) is
pleased to provide an update on the ongoing drilling program on t h e H u r r i c a n e z o n e a t t h e L a r o c q u e E a s t
property. Highlights include assay results from drill hole LE1 9‐16A and the intersection of uranium
mineralization in drill hole LE19‐18C1. The Hurricane zone is located on the Company’s 100% owned Larocque
East property (the “Property”) in the Eastern Athabasca Basin of Saskatchewan (Figure 1).
Highlights
Drill Hole LE19‐16A returned the best interval to date at the Hurricane zone, comprised of 5.4%
U3O8 over 7.0m, including 15.9% U3O8 over 2.0m
Uranium mineralization was intersected in drill hole LE19‐18C1, with an intersection of 5.0m >1,000
CPS, including 0.5m >10,000 CPS
Drill Hole LE19‐19, a 250m eastern step‐out drill hole designed to locate key structures beneath the
Hurricane zone trend, successfully intersected several faults to be targeted by follow‐up drilling
Steve Blower, Vice President of Exploration commented: “Hurrica ne continues to deliver exceptional results,
including the best mineralized interval to date in drill hole LE 1 9 ‐ 1 6 A . I ’ m a l s o e n c o u r a g e d t h a t t h e k e y
Hurricane structures were identified in undercutting drill hole LE19‐19, a 250m step‐out east of the Hurricane
zone. This bodes well for the next drill holes on this section.”
Craig Parry, CEO commented: “The team has done a tremendous job of further testing and extending the
H u r r i c a n e D e p o s i t . T h e s y s t e m i s s h o w i n g i t h a s h i g h ‐ g r a d e p o t ential and now strike extent and scale. I’m
particularly excited to see the results from our eastern most p athfinder hole LE19‐19 and we look forward to
reporting further results from the program where we have a further eight drill holes planned.”
Drill Hole LE19‐16A Assays (Section 4635E)
Drill hole LE19‐16A intersected the Hurricane zone 13.5m south of winter drill hole LE19‐13. An interval of
strong sandstone hosted uranium mineralization was intersected at 315.5‐322.5m, just above the
unconformity. The entire 7.0m interval averages 5.4% U3O8, 0.7% Ni and 0.1% Co and includes a 2.0m
subinterval that averages 15.9% U3O8, 1.4% Ni and 0.1% Co. The highest‐grade assay in the interval was 36.5%
U3O8, 2 . 3 % N i a n d 0 . 1 % C o o v e r 0 . 5 m . T a b l e 1 c o m p a r e s t h e a s s a y r esults in LE19‐16A against previous
intersections at the Hurricane zone. The location of the drill hole is shown in plan‐view in Figure 2 and on a
cross‐section in Figure 3. Figure 4 is an annotated core photo of the mineralization.
Drill Hole LE19‐18C1 Mineralization (Section 4735E)
Drill hole LE19‐18C1 is a wedge off‐cut from mineralized parent drill hole LE19‐18. It was designed to evaluate
the potential for additional mineralization north of LE19‐18. The result was successful, with LE19‐18C1
intersecting 5.0m of uranium mineralization >1,000 CPS, including 0.5m >10,000 CPS. The location is shown in
plan‐view on Figure 2 and on a cross‐section in Figure 5. Assays are pending.
Drill Hole LE19‐18 Assays (Section 4735E)
Drill hole LE19‐18 (Figures 2 and 5) was completed as an along‐ strike step‐out 100m to the east of drill hole
LE19‐16A. Chemical assays have now been received from this drill hole and it intersected 3.0m averaging 1.5%
U3O8. The mineralization straddles the unconformity and includes 6.0% U3O8 over 0.5m.
Drill Hole LE19‐19 (Section 4985E)
Completed as an under‐cutting, along‐strike step‐out 250m east of drill holes LE19‐18 and LE19‐18C1, drill hole
LE19‐19 (Figures 2 and 6) was designed to locate the favourable structures and graphitic rock types associated
with the Hurricane zone mineralization. This cross‐section includes historical weakly mineralized drill hole KER‐
07. The results in drill hole LE19‐19 are encouraging. The key package of faults in graphitic basement rocks is
present in the drill core, and the intersection of those faults with the unconformity is currently being targeted.
This drilling is located 500m east of the westernmost Hurricane zone drill hole, LE19‐12.
Drill Hole LE19‐20 (Section 4735E)
Drill hole LE19‐20 (Figures 2 and 5) was completed on section w ith, and 12.5m north of, drill hole LE19‐18C1.
While it intersected considerable sandstone and basement altera tion, no significantly elevated radioactivity
was observed. This drill hole is interpreted to have intersected the unconformity north of the Hurricane zone.
Significant potential still exists on this section to the south of LE19‐18 – along strike of the strong mineralization
intersected by drill hole LE19‐16A. This area will be evaluated with drilling during this program.
Next Steps
Eight drill holes remain in the fully funded summer drilling program, as originally planned. The next drill holes
will comprise additional drill holes on the LE19‐18 and LE19‐19 sections, further step‐outs to the east, and infill
drill holes on other sections where necessary.
The Larocque East Property
The 100% owned Property consists of 20 mineral claims totaling 8,371ha and is not encumbered by any
r o y a l t i e s o r o t h e r i n t e r e s t s . L a r o c q u e E a s t i s i m m e d i a t e l y a d ja c e n t t o t h e n o r t h e n d o f I s o E n e r g y ’ s G e i g e r
property and is 35 kilometres northwest of Orano Canada’s McClean Lake uranium mine and mill.
Along with other target areas, the Property covers a 15‐kilomet re‐long northeast extension of the Larocque
Lake conductor system; a trend of graphitic metasedimentary basement rocks that is associated with significant
uranium mineralization at the Hurricane zone, and in several occurrences on Cameco Corp.’s neighbouring
property to the southwest of Larocque East. The Hurricane zone was discovered in July, 2018 and was recently
followed up with a 12‐hole drilling campaign in the winter of 2 019. Eleven of those 12 drill holes intersected
substantial uranium mineralization, including 10.4% U 3O8 over 3.5m in drill hole LE19‐02 and 3.2% U 3O8 over
8.5m in drill hole LE19‐12. Drilling at Cameco Corp.’s Larocque Lake zone on the neighbouring property to the
southwest has returned historical intersections of up to 29.9% U3O8 over 7.0 metres in drill hole Q22‐040. Like
the nearby Geiger property, Larocque East is located adjacent t o the Wollaston‐Mudjatik transition zone ‐ a
major crustal suture related to most of the major uranium depos i t s i n t h e e a s t e r n A t h a b a s c a B a s i n .
Importantly, the sandstone cover on the Property is thin, ranging between 140 metres and 330 metres in
previous drilling. In addition to the Hurricane zone discovery, four historical drill holes have intersected weak
uranium mineralization at other locations on the Property to date.
Table 1 – 2019 Hurricane Zone Intersections
Hole‐ID From (m) To (m) Length (m) Radioactivity 1,2 (CPS) Chemical Assays Location
U 3O8 (%) Ni (%) Co (%)
LE19‐023 316.5 320.0 3.5 >1,000 0.2 0.1 0.2 Section 4560E
and 326.5 330.0 3.5 >1,000 10.4 0.8 0.0
incl. 328.5 330.0 1.5 >20,000 23.6 1.6 0.0
incl. 329.0 329.5 0.5 >50,000 38.2 1.5 0.1
LE19‐033 324.0 324.5 0.5 >1,000 0.2 0.1 0.0 Section 4560E
and 326.5 329.5 3.0 >1,000 2.7 2.3 0.0
incl. 328.5 329.5 1.0 >5,000 7.6 6.6 0.1
incl. 329.0 329.5 0.5 >20,000 13.3 11.8 0.1
LE19‐043 329.0 329.5 0.5 >1,000 0.1 0.0 0.0 Section 4560E
and 333.0 333.5 0.5 >1,000 0.4 0.2 0.0
LE19‐053 No significantly elevated radi oactivity Section 4560E
LE19‐063 328.0 330.0 2.0 >1,000 0.4 0.1 0.1 Section 4585E
and 332.0 336.0 4.0 >5,000 3.8 1.1 0.0
incl. 333.5 335.5 2.0 >10,000 5.5 0.7 0.0
incl. 333.5 334.0 0.5 >20,000 13.7 1.2 0.0
LE19‐073 325.0 331.0 6.0 >1,000 0.4 0.8 1.4 Section 4585E
incl. 328.0 328.5 0.5 >5,000 1.0 4.9 9.3
LE19‐083 326.5 327.0 0.5 >1,000 0.4 0.1 0.1 Section 4535E
and 333.0 336.5 3.5 >1,000 0.8 1.5 0.4
incl. 335.5 336.0 0.5 >10,000 3.7 8.3 1.3
LE19‐093 325.0 329.5 4.5 >1,000 4.2 1.1 0.8 Section 4535E
incl. 327.0 329.0 2.0 >20,000 6.8 1.9 1.3
LE19‐103 331.5 333.0 1.5 >1,000 0.6 1.7 1.9 Section 4535E
LE19‐113 333.0 333.5 0.5 >5,000 2.1 0.1 0.1 Section 4485E
LE19‐123 320.5 329.0 8.5 >1,000 3.2 2.1 0.2 Section 4485E
incl. 324.5 327.0 2.5 >10,000 7.2 0.6 0.0
incl. 324.5 325.0 0.5 >20,000 3.5 0.3 0.0
incl. 326.0 327.0 1.0 >20,000 14.3 1.1 0.0
incl. 328.5 329.0 0.5 >20,000 12.8 15.0 0.4
LE19‐133 320.0 320.5 0.5 >1,000 0.2 0.0 0.0 Section 4635E
and 321.5 324.0 2.5 >1,000 0.6 0.2 0.5
incl. 322.5 323.0 0.5 >10,000 1.6 0.4 1.1
LE19‐14B4 323.0 325.0 2.0 >1,000 0.2 0.0 0.1 Section 4535E
and 327.5 331.0 3.5 >1,000 0.3 0.3 0.7
incl. 327.5 328.0 0.5 >5,000 0.6 0.1 0.4
incl. 329.0 329.5 0.5 >5,000 0.7 0.3 0.7
LE19‐154 No significantly elevated radi oactivity Section 4735E
LE19‐16A4 315.5 322.5 7.0 >1,000 5.4 0.7 0.1 Section 4635E
incl. 318.0 320.0 2.0 >10,000 15.9 1.4 0.1
and incl. 320.5 321.0 0.5 >10,000 3.2 2.1 0.0
LE19‐174 No significantly elevated radi oactivity Section 4635E
LE19‐184 323.0 326.0 3.0 >1,000 1.5 0.1 0.1 Section 4735E
incl. 325.0 325.5 0.5 >10,000 6.0 0.1 0.1
LE19‐18C15 261.0 266.0 5.0 >1,000 Pending Section 4735E
incl. 261.5 262.0 0.5 >10,000
LE19‐19 No significantly elevated radioactivity Section 4 985E
LE19‐20 No significantly elevated radioactivity Section 4 735E
Notes: 1. Radioactivity is total gamma from drill core measure d with an RS‐125 hand‐held spectrometer.
2. Measurements of total gamma cps on drill core are an indication of uranium content, but may not correlate with uranium chemical assays.
3. Winter 2019 drilling program – previously disclosed
4. Summer 2019 drilling program – radioactivity previously disclosed
5. Collared 59m down‐hole in LE19‐18
Figure 1 –Larocque East Property Map
Figure 2 – Drill Hole Location Map
Figure 3 – Cross Section 4635E
Figure 4 –LE19‐16A Core Photo Annotated with Assay Results