Featured Project

A program of 1,909m in 6 drill holes was completed in March 2023. Drilling followed up favourable results identified in summer of 2022. Drill hole LE23-146 is the highlight of the winter program and intersected significant basement alteration consisting of hydrothermal hematite and clay that is associated with uranium mineralization in Athabasca Basin.

A program of 2,175m in 6 drill holes was completed at Larocque East. Four holes were dedicated to expansion of Hurricane.  Drill hole LE23-155 targeted the unconformity 26.5m west of drill hole LE21-78c1 and intersected 8.5m averaging 4.1% U3O8 between 325.0 to 333.5m downhole, which includes an intercept of 6.8% U3O8 over a 1.0 m interval from 327.0 to 328.0m and includes a higher-grade interval of 23% U3O8 over 1.0 m from 331.5 to 332.5m. Additionally, a single hole was completed to test resistivity targets north of Hurricane. The drill hole added valuable knowledge in understanding the geology of the project area.

An Innovative Ambient Noise Tomography (ANT) survey was completed on the Larocque East in collaboration with FLEET. The ANT survey successfully detected a significant low velocity feature coincident with the known Hurricane alternation.  It also identified a compelling 1-kilometre-long ANT target along strike of the Hurricane deposit with the same footprint as the feature associated with Hurricane. 

A program of 12,147m in 30 drill holes was completed in March 2022. The primary goal of the program was to systematically test Larocque Lake conductive trend. Five drill holes were planned to test proximal to Hurricane zone for potential southern expansion. Drilling intersected significant alteration and structure in several holes including in hole LE22-115A 2.0 m @ 1.03% U3O8, including 0.5m @ 3.26% U3O8.

A program of 1,998m in 6 drill holes was completed in July 2022. Three drill holes tested anomalous sandstone geochemistry within two kilometers of Hurricane deposit and one hole tested underexplored section of the Larocque trend in the eastern portion of the project. The remaining two drills holes were planned to follow-up anomalous geochemistry intersected in historical drilling on the Kernaghan trend.

A program of 12,694m in 30 drill holes was completed in November 2021. The drilling campaign had three main objectives: expansion of Hurricane zone, infill drill to test the continuity of the high-grade mineralization, and exploration of areas east of Hurricane. Drilling intersected mineralization in several holes, including:

• LE21-107: 6.5m @ 20.4 U3O8, including 3.5m @ 34.5% U3O8.
• LE21-78C1: 12m @ 5.2 U3O8, including 2.0m @ 27.6% U3O8.
• LE21-87A: 7.5m @ 4.5 U3O8, including 2.0m @ 9.2% U3O8.

A program of 10,325m of core drilling in 24 drill holes was completed in March with two drills.  One drill rig concentrated on the western end of the Hurricane zone footprint, expanding the mineralization west to the property boundary. A second drill rig began evaluating the potential for additional uranium mineralization well to the east (200m to 1,600m) of the Hurricane zone footprint.  Both of these efforts were successful. 

Western Hurricane Zone Expansion

All 14 drill holes completed were mineralized.  Further, a new zone characterized by very high-grade mineralization over thick intervals was intersected in several drill holes.  The best example is drill hole LE20-34, which intersected 33.9% U₃O₈ over 8.5m, including 57.1% U₃O₈ over 5.0m. All five of the westernmost sections remained open for expansion to the north and/or to the south. 

Eastern Potential

Drilling to the east of the Hurricane zone evaluated the western portion of a 5km long basement conductive zone mapped by the 2019 DC-resistivity survey.  Strongly graphitic basement gneisses hosting brittle faults were intersected in all the widely spaced reconnaissance drill holes completed up to 1.6km east of the Hurricane zone during the winter program.  Several of these drill holes also intersected significant sandstone alteration with elevated sandstone uranium geochemistry and/or illitic clay alteration.

A program of 9,578 metres in 24 drill holes was completed in October 2020, with many outstanding intersections obtained as the footprint expanded, including:

• LE20-76: 7.5m @ 38.8% U308, including 3.5m @ 74.0% U₃O₈
• LE20-72: 6.0m @ 6.2% U308, including 1.5m @ 20.7% U₃O₈
• LE20-68: 11.0m @ 6.9% U308, including 1.5m @ 49.3% U₃O₈
• LE20-64: 5.0m @ 48.8% U308 including 4.0m @ 57.5% U₃O₈
• LE20-62: 4.5m @ 6.2% U308 including 2.5m @ 11.1% U₃O₈
• LE20-57: 10.0m @ 11.7% U308 including 2.5m @ 46.0% U₃O₈
• LE20-54: 9.0m @ 12.8% U308 including 4.0m @ 27.1% U₃O₈

The first follow-up drilling program was completed in the winter (January to March).  The program was very successful with 11 of 12 drill holes intersecting significant uranium mineralization.

Highlights include:

• LE19-02: 3.5m @ 10.4% U₃O₈,
• LE19-03: 3.0m @ 2.7% U₃O₈, 2.3% Ni,
• LE19-06: 4.0m @ 3.8% U₃O₈,
• LE19-09: 4.5m @ 4.2% U₃O₈, 1.1% Ni, 0.8% Co
• LE19-12: 8.5m @ 3.2% U₃O₈ and 2.1% Ni

Following the winter drilling campaign, the Hurricane zone was open for expansion on most sections, along-strike in both directions, and measured 150 metres long, 40 metres across and up to 10 metres thick.

Drilling resumed in the summer of 2019 with a 17-drill hole campaign designed primarily to evaluate the potential for expansion along-strike to the east of the winter drilling.  This program was also successful, with the best intersection to date being obtained from drill hole LE19-16A (7.0m @ 5.4% U₃O₈, 0.7% Ni and 0.1% Co).  Drill holes LE19-18 (3.0m @ 1.5% U₃O₈) and LE19-18C1 (5.0m @ 1.2% U₃O₈) successfully extended high-grade uranium mineralization 100 metres to the east.

This was followed by a large, 250m further step-out to the historical drill hole KER-07 section.  Weak uranium mineralization in drill hole LE19-22 successfully extended the Hurricane zone footprint to 500 metres long.  A 40-metre gap on-section between drill holes LE19-22 and KER-07 may contain significant uranium mineralization. The next large step-out section 200m along-strike to the east was begun with drill hole LE19-26.  Intended to be a stratigraphic drill hole angled beneath the Hurricane zone target area, LE19-26 encountered a thick zone of sandstone alteration and structure characterized by elevated trace element geochemistry and radioactivity.  All of this occurs well north of the expected trace of the Hurricane zone.  The drill hole is located on the western edge of a prominent basement DC-resistivity low anomaly that extends to the east for several kilometres, likely indicating the presence of highly graphitic basement rocks – the preferred host for uranium deposits in the Athabasca basin.

The Hurricane zone was discovered by drill hole LE18-01A, IsoEnergy’s first ever drill hole at Larocque East.  Drill hole LE18-01A intersected a broad, 8.5-metre-long interval of elevated radioactivity averaging 1.26% U₃O₈ and includes a higher-grade subinterval of 3.58% U₃O₈ over 2.5 metres.  Within the higher-grade subinterval is a zone of off-scale radioactivity (>15,000 cps on an SRAT SPP2 scintillometer (the “SPP2”)) that averages 6.45% U₃O₈ over 1.0 metre.