IsoEnergy Intersects Additional Uranium Mineralization at the Hurricane Zone and Identifies New Target Areas
IsoEnergy Intersects Additional Uranium Mineralization at the
Hurricane Zone and Identifies New Target Areas
Vancouver, BC, August 28, 2019 – IsoEnergy Ltd. (“ IsoEnergy” or the “ Company”) ( TSXV: ISO; OTCQX: ISENF ) is
pleased to provide an update on its recently completed summer drilling program on the Hurricane zone at the
Larocque East property. Highlights include assay results from drill hole LE19-18C1, intersections of strong
radioactivity in LE19-28 and LE19-29, plus the intersection of mineralization on an aggressive 250m step-out to the
east. Additionally, interpretation of new DC-Resistivity data has identified new target areas along-strike to the east
of the Hurricane zone. 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).
Drilling Highlights
Chemical assays received for drill hole LE19-18C1, comprising 1.2% U 3O8 over 5.0m, including 3.9% U 3O8
over 0.5m
Strong uranium mineralization was intersected in drill hole LE19-28, with an intersection of 10.5m >1,000
CPS, including 1.0m >20,000 CPS
Strong uranium mineralization was intersected in drill hole LE19-29, with an intersection of 2.0m
>1,000CPS, including 0.5m >20,000CPS
Length of the Hurricane zone extended to 500m with an intersection of uranium mineralization on
section 4985E in drill hole LE19-22
Additionally, the newly defined strong resistivity anomaly to the east of the known Hurricane deposit
provides a high priority target for the follow-up winter 2019/2020 drill program
Steve Blower, Vice President of Exploration commented: “I’m encouraged by the success of our summer drilling
program, with several mineralized drill holes on the 4735E section, followed by mineralization on a big 250m step-
out to the 4985E section. Further, an undercutting drill hole completed an additional 200m to the east intersected
substantial sandstone faulting, alteration and elevated radioactivity and remains to be followed up. Our recently
completed DC-Resistivity survey supports our view that there are several kilometres of sparsely drilled favourable
geology extending to the east of Hurricane.”
Craig Parry, CEO commented: “With the zone now extending at least 500m along-strike, Hurricane is the most
exciting recent uranium discovery in the Athabasca basin. I’d like to thank our team and field crew for a well-run
drill program that has achieved our objectives in a safe and efficient manner - on-time and on-budget. Additional
drilling to evaluate the size of the system is clearly warranted, especially considering the results of our DC-Resistivity
geophysical survey. In addition to the positive results on the Hurricane deposit I am highly encouraged by the results
of our eastern most hole which suggests that the newly defined strong resistivity anomaly at the east end of the
Hurricane host conductor has further potential.”
Drill Hole LE19-18C1 Assays (Section 4735E)
Drill hole LE19-18C1 was designed to evaluate the potential for additional mineralization north of drill hole LE19-18.
The result was successful, with LE19-18C1 intersecting 1.2% U 3O8 over 5.0m, including 3.9% U 3O8 over 0.5m. The
location is shown in plan-view on Figure 2 and on a cross-section in Figure 3.
Drill Hole LE19-28 Mineralization (Section 4660E)
Drill hole LE19-28 (Figures 2 and 4) was completed as an along-strike step-out on the section 25m to the east of the
LE19-16A section. LE19-28 intersected a 10.5m interval (321.0-331.5m) of strong radioactivity >1,000 CPS that
includes a 1.0m subinterval >20,000 CPS. Almost all of the mineralization is located in the basal Athabasca
sandstone, with the sub-Athabasca unconformity being intersected at 331.4m. Drill hole LE19-28 is the only drill
hole completed on this section to date, and therefore this thick and high-grade portion of the zone is wide open for
expansion to both the north and south on this section.
Drill Hole LE19-29 Mineralization (Section 4610E)
Completed on section 4610E, 25m west of the LE19-16A section, drill hole LE19-29 (Figures 2 and 5) intersected a
2.0m interval (337.5-339.5m) of strong radioactivity >1,000 CPS that includes a 0.5m subinterval >20,000 CPS. The
drill hole is interpreted to have over-shot the strongest part of the Hurricane zone mineralization and the zone is
wide open for expansion to the north on this section.
Drill Hole LE19-22 Mineralization (Section 4985E)
Drill hole LE19-22 was completed on the 4985E section 250m east of previous drilling (LE19-18 and LE19-18C1) to
follow-up undercutting drill hole LE19-19 (Figures 2 and 6) and historical, weakly mineralized drill hole KER-07. The
result was successful, with the intersection of strong sandstone alteration and faulted graphitic gneiss associated
with visible secondary uranium mineralization (0.1% U 3O8 over 0.5m) intersected immediately beneath the sub-
Athabasca unconformity.
Drill Hole LE19-26 (Section 5185E)
Completed as an undercutting step-out drill hole 200m east of the LE19-22/KER-07 section (Figures 2 and 7), drill
hole LE19-26 intersected impressive sandstone faulting, alteration, and elevated radioactivity in the basal sandstone
and strongly faulted graphitic gneiss in the basement rocks. The graphitic faults, which are known to control the
location of Hurricane zone mineralization further west, will be targeted at the unconformity during the next drilling
program. Also, as LE18-01A (the Hurricane Zone discovery drill hole) followed up similar features in historical drill
hole KER-12, the strong faulting, alteration and elevated radioactivity in the basal sandstone indicate high priority
targets exist to the north and east of drill hole LE19-26 on this section.
DC-Resistivity Surveying
A 54 line-km ground geophysical survey (DC-Resistivity) was completed on 20 survey lines at 200m, 400m and 600m
spacing covering the entire western half of the Larocque conductor system on the Larocque East property. The
survey successfully tracks the Larocque conductor system east of the Hurricane zone (Figure 8) and highlights several
areas with apparent sandstone breaches that may be indicative of enhanced sandstone alteration. Importantly, the
strength of the graphitic conductor system clearly increases to the east of the current drill pattern and this increased
conductivity extends for several kilometres.
Next Steps
The summer drilling program is now complete. Geological interpretations will be finalized when all pending chemical
assays have been received. Integration of the summer drilling data with the DC-Resistivity results is on-going and
confirms the highly prospective nature of the eastern extension of the Hurricane trend on the 5185E section and
beyond. This area is expected to be a primary focus of future drilling activities, along with infill drilling on sections
of known but as-yet unconstrained mineralisation at Hurricane and testing of the large 200m gap in the drilling
between the 4985E and 5185E sections. This work is expected to commence in January 2020.
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
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
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 radioactivity 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
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
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
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
LE19-14B3 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
LE19-153 No significantly elevated radioactivity Section 4735E
LE19-16A3 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
LE19-173 No significantly elevated radioactivity Section 4635E
LE19-183 323.0 326.0 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
LE19-18C14,5 261.0 266.0 5.0 >1,000 1.2 0.0 0.0 Section 4735E
incl. 261.5 262.0 0.5 >10,000 3.9 0.0 0.0
LE19-194 No significantly elevated radioactivity Section 4985E
LE19-204 No significantly elevated radioactivity Section 4735E
LE19-21 No significantly elevated radioactivity Section 4985E
LE19-22 326.5 327.0 0.5 1,000 0.1 0.0 0.0 Section 4985E
LE19-23 321.0 322.0 1.0 >1,000 2.3 0.1 0.1 Section 4735E
incl. 321.0 321.5 0.5 >10,000 3.9 0.1 0.1
and 325.5 326.0 0.5 >1,000 0.3 0.0 0.0
LE19-24 No significantly elevated radioactivity Section 4735E
LE19-25 323.5 324.0 0.5 >1,000 1.8 0.0 0.2 Section 4685E
and 331.5 333.0 1.5 >1,000 0.5 0.6 0.0
incl. 332.5 333.0 0.5 >5,000 0.9 1.2 0.0
LE19-26 No significantly elevated radioactivity Section 5185E
LE19-27A No significantly elevated radioactivity Section 4610E
LE19-28 321.0 331.5 10.5 >1,000 Pending Section 4660E
Incl. 322.0 322.5 0.5 >5,000
and incl. 326.5 327.0 0.5 >5,000
and incl. 329.5 331.5 2.0 >5,000
incl. 330.5 331.5 1.0 >20,000
LE19-29 337.5 339.5 2.0 >1,000 Pending Section 4610E
incl. 338.5 339.5 1.0 >5,000
incl. 339.0 339.5 0.5 >20,000
Notes: 1. Radioactivity is total 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 uranium chemical assays.
3. Radioactivity and chemical assays previously disclosed
4. 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 4735E
Figure 4 – Cross Section 4660E
Figure 5 – Cross Section 4610E