IsoEnergy Drills 4.5m of 4.2% U3O8 in Drill Hole LE19‐09 at the Hurricane Zone High‐Grade Uranium Discovery Uranium Mineralization Remains Open on All 5 Sections Drilled to Date and Along‐Strike in Both Directions
IsoEnergy Drills 4.5m of 4.2% U3O8 in Drill Hole LE19‐09 at the
Hurricane Zone High‐Grade Uranium Discovery
Uranium Mineralization Remains Open on All 5 Sections Drilled to Date and Along‐Strike in
Both Directions
Vancouver, BC, April 1, 2019 – IsoEnergy Ltd. (“ IsoEnergy” or the “ Company”) (TSXV: ISO; OTCQX: ISENF ) is
pleased to announce assay result for drill holes LE19‐09, LE19‐10 and LE19‐11. The highlight is drill hole LE19‐
0 9 , w h i c h i n t e r s e c t e d 4 . 5 m o f 4 . 2 % U3O8, including 2.0m of 6.8% U3O8. Drill hole LE19‐09 was collared 30
metres to the west of drill hole LE18‐01A, the original Hurrica ne zone discovery drill hole which returned 8.5
metres of 1.3% U3O8 including 2.5m of 3.6% U3O8.
Highlights
Drill hole LE19‐09 intersected 4.5m of 4.2% U3O8, including 2.0m of 6.8% U3O8.
Drill hole LE19‐10 intersected 1.5m of 0.6% U3O8, 1.7% Ni and 1.9% Co.
Drill hole LE19‐11 intersected 0.5m of 2.1% U3O8, well north of the expected extent of the zone.
The Hurricane zone is a new discovery of high‐grade uranium min eralization on the Company’s 100% owned
Larocque East property (the “Property”) in the eastern Athabasc a Basin of northern Saskatchewan (Figure 1).
The Company recently completed the first follow‐up drilling pro gram since the discovery in 2018. With 11 of
12 drill holes in the follow‐up campaign intersecting significa nt uranium mineralization, the program
successfully expanded the mineralized zone to 150m (long) x 38m (wide) and up to 8.5m thick. Mineralization
remains open on all five sections drilled to date, and along st rike in both directions. The Company, having
raised $5.5 million in December 2018, remains fully funded for a follow‐up drilling campaign that is planned
for the summer.
Steve Blower, Vice President, Exploration commented: “Continuity of the uranium mineralization at the
Hurricane zone, as exemplified by these drill results, continues to be encouraging. I’m particularly pleased with
the robust intersection in drill hole LE19‐09, and am impressed with the interval in LE19‐11, given that we
didn’t expect mineralization to extend that far north. The result bodes well for further drilling on that section.”
LE19‐09
Collared 30 metres west of the discovery section, drill hole LE 19‐09 intersected high‐grade uranium
mineralization along‐strike of discovery drill hole LE18‐01A an d drill hole LE19‐03 (Table 1). The main
intersection consists of 4.5 metres of fracture controlled, disseminated and replacement styles of pitchblende
uranium mineralization that averages 4.2% U3O8, 1.1% Ni and 0.8% Co, as summarized in Table 1. This includes
2.0 metres of 6.8% U3O8, 1.9% Ni and 1.3% Co. Figures 2 and 3 show the location of the drill hole in plan‐view
and cross‐section, respectively. Figure 4 is a core photo showing the mineralization.
LE19‐10
This drill hole was completed 12.5 metres south of LE19‐09 on section 4535E and intersected 1.5m of uranium
and base metal mineralization that averages 0.6% U 3O8, 1.7% Ni and 1.9% Co. The Hurricane zone remains
open to the south of LE19‐10.
LE19‐11
Drill hole LE19‐11 was the first hole drilled along‐strike to the west on section 4485E. It was drilled as an angled
hole from the north designed to locate target stratigraphy and structures for follow up with drill hole LE19‐12,
28m to the south. As such, drill hole LE19‐11 was not expected to be mineralized, but a 0.5m zone of strong
pitchblende mineralization was intersected at the unconformity that returned 2.1% U3O8. T h e 2 8 m g a p
between drill holes LE19‐11 and strongly mineralized LE19‐12 remains to be drilled.
Next Steps
Assay results from the last drill holes LE19‐12 and LE19‐13 will be reported in the coming weeks. A ground DC‐
resistivity survey will begin shortly over the Hurricane zone a nd potential eastern extensions. The results of
the survey will be used to help target a planned follow‐up drilling campaign expected to begin in June, 2019.
Larocque East
Larocque East consists of 6 mineral claims totaling 3,200 hectares and was purchased in May, 2018. The
Property is owned 100% by IsoEnergy and is not encumbered by any royalties or other interests. Larocque East
is immediately adjacent to the north end of IsoEnergy’s Geiger p r o pe r t y a n d i s 3 5 k i l o m e t r e s n o r t h w e s t o f
Orano Canada’s McClean Lake uranium mine and mill.
The Property covers a 15‐kilometre‐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 a neighbouring property to the southwest of Larocque East. The
c l o s e s t o f t h e s e t o L a r o c q u e E a s t a r e t h e L a r o c q u e L a k e a n d L a rocque North zones, which are located 6.5
kilometres and 0.4 kilometres, respectively, to the southwest of the western Larocque East property boundary.
Drilling at the Larocque Lake zone has returned historical intersections of up to 29.9% U3O8 over 7.0 metres in
drill hole Q22‐040. Drilling at the Larocque North zone has returned intersections of up to 2.05% U3O8 over 0.6
metres in drill hole Q22‐16. Like the nearby Geiger property, L a r o c q u e E a s t i s l o c a t e d a d j a c e n t t o t h e
Wollaston‐Mudjatik transition zone ‐ a major crustal suture rel ated to most of the major uranium deposits in
the eastern Athabasca Basin. Importantly, the sandstone cover on Larocque East is thin, ranging between 140
metres and 330 metres in previous drilling.
In addition to the Hurricane zone discovery, four historical dr ill holes have intersected weak uranium
mineralization at other locations on the Larocque East property to date, including drill hole KER‐07 (0.12% U3O8
over 0.1 metre), located 400 metres east of the discovery section.
Table 1 – Hurricane Zone 2019 Drilling Radioactive Intervals
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
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
LE19‐094 325.0 329.5 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
LE19‐104 331.5 333.0 1.5 >1,000 0.6 1.7 1.9 Section 4535E
LE19‐114 333.0 333.5 0.5 >5,000 2.1 0.1 0.1 Section 4485E
LE19‐124 320.5 329.0 8.5 >1,000 Pending Section 4485E
incl. 324.5 327.0 2.5 >10,000 Pending
incl. 324.5 325.0 0.5 >20,000 Pending
incl. 326.0 327.0 1.0 >20,000 Pending
incl. 328.5 329.0 0.5 >20,000 Pending
LE19‐134 320.0 320.5 0.5 >1,000 Pending Section 4635E
and 321.5 324.0 2.5 >1,000 Pending
incl. 322.5 323.0 0.5 >10,000 Pending
Notes: 1. Radioactivity is to tal gamma from drill core measured 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 chemical assays.
3. Radioactivity and chemical assays previously disclosed.
4. Radioactivity previously disclosed.
Figure 1 – Larocque East Property Location Map
Figure 2 –Hurricane Zone Detailed Planview
Figure 3 – Cross‐Section 4535E (Showing Drill Holes LE19‐09 and 10)
Figure 4 – Core Photo of Mineralization in Drill Hole LE19‐09
Qualified Person Statement
The scientific and technical information contained in this news release was prepared by Andy Carmichael,
P.Geo., IsoEnergy’s Senior Geologist, who is a “qualified perso n” (as defined in National Instrument 43‐101 –
Standards of Disclosure for Mineral Projects). Mr. Carmichael has verified the data disclosed. This news release
refers to properties other than those in which the Company has an interes t. Min eralizatio n o n tho s e o ther
properties is not necessarily indicative of mineralization on t he Company’s properties. An RS‐125 hand‐held
spectrometer was used to verify that the radioactivity is due to uranium. As the drill holes reported herein are
vertical or near‐vertical, and the mineralization is interprete d to be horizontal, the true thickness is expected
to be within 90% of the cored intervals.
About IsoEnergy
IsoEnergy is a well‐funded uranium exploration and development c o m p a n y w i t h a p o r t f o l i o o f p r o s p e c t i v e
projects in the eastern Athabasca Basin in Saskatchewan, Canada and a historic inferred mineral resource
estimate at the Mountain Lake uranium deposit in Nunavut. IsoE nergy is led by a Board and Management
team with a track record of success in uranium exploration, dev elopment and operations. The Company was
founded and is supported by the team at its major shareholder, NexGen Energy Ltd.
Craig Parry
Chief Executive Officer
IsoEnergy Ltd.
+1 778 379 3211
www.isoenergy.ca
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www.isoenergy.ca
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