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IsoEnergy Ltd
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Close 2022-04-21 C$ 4.88
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IsoEnergy drills 12,147 m, 30 holes at Larocque East

2022-04-22 09:49 ET - News Release

Mr. Tim Gabruch reports

ISOENERGY PROVIDES WINTER EXPLORATION UPDATE

IsoEnergy Ltd. has released an update on the winter, 2022, exploration activities on its 100-per-cent-owned Larocque East, Geiger, Hawk and Ranger projects in the eastern Athabasca basin. Larocque East hosts the Hurricane zone, a high-grade uranium discovery located in the Eastern Athabasca basin of Saskatchewan. Winter, 2022, drilling at Hurricane has now concluded and advanced planning is under way for the follow-up summer program.

Highlights:

  • 30 drill holes totalling 12,147 metres completed at Larocque East;
  • 36 kilometres of conductor strike mapped in two target areas at Geiger;
  • Ground geophysical surveys completed at Ranger and Hawk.

Tim Gabruch, president and chief executive officer, commented: "IsoEnergy has successfully completed the winter drill program at Larocque East, and significantly advanced the understanding of Hurricane's current size and scope. Assay results are pending and, based on these winter drill results at Larocque East and forthcoming geophysical survey results, planning is well under way for an upcoming summer exploration program."

Andy Carmichael, vice-president of exploration, commented: "During the winter season, we continued to advance the project while developing a pipeline of drill-ready projects and targets. At Larocque East, drilling evaluated Hurricane for the potential for additional significant mineralization as well as systematically explored the highly prospective Larocque Lake conductive trend. Concurrently, geophysical surveying has been completed at Geiger, Ranger and Hawk and successfully generated quality drill targets for future drill programs."

Note: Radioactivity is total gamma counts per second (CPS) from drill core measured with an RS-125 hand-held spectrometer (RS-125).

Larocque East project

Drilling at Larocque East recently concluded and had two primary objectives: one, testing for stepout mineralization at the Hurricane zone and, two, systematic exploration of the Larocque Lake conductive trend within the project. Winter drilling comprised 30 diamond drill holes totalling 12,147 m.

At Hurricane, drilling followed-up mineralization intersected in LE21-101 (0.6 per cent over 4.5 m, including 3.1 per cent over 0.5 m) which was open to the east and for 150 m to the west. Testing comprised a series of systematic step outs to test for mineralization. Located 75 m west of LE21-101, LE22-115A intersected 2.0 m of radioactivity over 500 CPS from 335.0 m to 337.0 m, which included 0.5 m over 5,000 CPS from 335.5m to 336.0 m. No significant radioactivity was intersected in the four remaining 2022 Hurricane-area drill holes. Geochemical results, including U3O8 assays from LE22-115A, are pending and will influence future drilling plans at Hurricane.

The remaining 25 drill holes explored the fertile Larocque Lake conductive trend, which extends for approximately eight km east of Hurricane.

Twelve drill holes were completed in Area A to follow up anomalous results in previous drilling and test basement electromagnetic conductors with coincident zones of decreased resistivity in the overlying sandstone. Anomalous alteration and structure were intersected in several drill holes along the southeastern margin of the Area A. Key results include drill hole LE22-116, which intersected radioactivity over 500 CPS from 282.0 to 282.5 m immediately above the unconformity. Like mineralization at Hurricane, radioactivity in LE22-116 is associated with strong, sandstone-hosted hydrothermal hematite and sulphide alteration. A wide zone of weak bleaching was intersected in the basement, but no major structures were intersected by LE22-116. One kilometre northeast of LE22-116, LE22-119 intersected metre-scale zones of massive clay with strong hydrothermal hematite and weakly elevated radioactivity in the basal sandstone. LE22-138 intersected two zones of moderate basement alteration with the upper zone extending from the unconformity at 277.2 m to 292 m and the second zone extending from 300 m to 311 m.

Eight drill holes evaluated a 1.2-kilometre-long area interpreted to have geological and geophysical characteristics analogous to Hurricane. Completed as a series of two-hole fences, drilling defined a zone of significant sandstone structure and alteration rooted in variably altered basement structures. Follow up will be guided by pending geochemical results.

Four drill holes evaluated the southern limb of the Larocque Lake conductive trend at wide spacing. As in Area B, zones of sandstone structure and alteration rooted in basement structures were intersected and follow-up will be determined based on geochemical results.

One drill hole tested the northernmost conductor along the Larocque Lake trend which intersected weak sandstone structure and failed to locate the targeted conductor.

Geiger project geophysical results

Ten lines of fixed loop transient electromagnetic (FLTEM) surveying completed at the Geiger project mapped 36 km of basement conductor strike and advanced two areas to a drill-ready state.

Four FLTEM profiles completed in the Q23 area identified an over-15-kilometre-strike-length of basement conductors, of which 13 km are moderate to strong. The 2.5-kilometre-long Q23 survey area has been tested by only two historical drill holes, Q23-004 and Q23-011. Q23-004 intersected favourable alteration, structure and anomalous uranium content in the sandstone but was lost prior to reaching the unconformity. The 2022 survey results indicate Q23-004 was poorly located, being collared 130 m and 220 m away from conductors located to the east and west, respectively. Four hundred metres to the southwest, Q23-011 intersected zones of anomalous uranium content in the sandstone and a narrow zone of anomalous radioactivity 10m below the unconformity attributed to fault-hosted uranium mineralization. The depth to the unconformity in the survey area is approximately 275 m.

Six FLTEM profiles completed in the Q48 area identified an over-20-kilometre-strike-length of basement conductors, of which 14 km are moderate to strong conductors. The 4.0-kilometre-long Q48 survey area lies eight km along strike from the Murphy Lake uranium occurrence (0.25 per cent U3O8 over 6.0 m in drill hole MP-15-03) and has been tested by a single drill hole, Q48-003, which intersected a major zone of alteration and structure in the sandstone with coincident anomalous uranium geochemistry. The depth to the unconformity is approximately 250 m.

First-pass diamond drilling is planned for the second half of 2022 to follow-up the winter, 2022, survey results.

Ranger project geophysics

Electromagnetic surveying at Ranger has been completed and interpretation of results is under way. The objective of the survey work has been to evaluate historical conductors and advance Ranger to a drill-ready state. The approximately 4.5-kilometre-by-6.0-kilometre survey area has been tested by only five historical drill holes, all of which are in the smaller southeastern portion and indicate the depth to the unconformity is between 230 m and 300 m. Conductive stratigraphy in the larger northwest portion of the survey area is completely untested by drilling in the project.

Hawk project geophysics

Electromagnetic surveying has also been completed at Hawk and interpretation of results is under way. The objective of the surveying has been to pinpoint historical basement conductors along widely spaced ground electromagnetic (EM) profiles to permit first-pass drill testing of the project. The Hawk project contains over 10 km of magnetic low trends containing historical conductors. The sole drill hole within the project targeted a conductor mapped by airborne surveying and failed to intersect conductive basement; none of the prospective strike within the project has been tested by drilling. The depth to the unconformity is expected to be between 600 m and 750 m.

The Larocque East property and the Hurricane zone

The 100-per-cent-owned Larocque East property consists of 33 mineral claims totalling 16,780 hectares. Two of the project's claims distal to the Hurricane zone are subject to a 2-per-cent net smelter returns royalty, of which 1 per cent may be bought back for $1-million at IsoEnergy's discretion. Larocque East is immediately adjacent to the north end of IsoEnergy's Geiger property and is 35 km northwest of Orano Canada's McClean Lake uranium mine and mill.

Along with other target areas, the Larocque East 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 Cameco Corp. and Orano Canada Inc.'s neighbouring property to the southwest of Larocque East. The Hurricane zone was discovered in July, 2018, and was followed up with 29 drill holes in 2019, 48 drill holes in 2020 and 16 drill holes in 2021. Dimensions are currently 375 m along-strike, up to 125 m wide and 12 m thick. The zone is open for expansion along-strike to the east, and to the north and south on some sections. Mineralization is polymetallic and commonly straddles the subAthabasca unconformity 320 m below surface. The best intersection to date is 38.8 per cent U3O8 over 7.5 m in drill hole LE20-76. Drilling at Cameco's Larocque Lake zone on the neighbouring property to the southwest has returned historical intersections of up to 29.9 per cent U3O8 over 7.0 m in drill hole Q22-040. Like the nearby Geiger property, Larocque East is located adjacent to the Wollaston-Mudjatik transition zone -- a major crustal suture related to most of the uranium deposits in the eastern Athabasca basin. Importantly, the sandstone cover on the property is thin, ranging between 140 m and 450 m in previous drilling.

Qualified person statement

The scientific and technical information contained in this news release was prepared by Mr. Carmichael, PGeo, IsoEnergy's vice-president of exploration, who is a qualified person (as defined in National Instrument (NI) 43-101 -- Standards of Disclosure for Mineral Projects). Mr. Carmichael has verified the data disclosed. All radioactivity measurements reported herein are total gamma from an RS-125 hand-held spectrometer. As mineralized drill holes at the Hurricane zone are oriented very steeply (minus 70 to minus 90 degrees) into a zone of mineralization that is interpreted to be horizontal; the true thickness of the intersections is expected to be greater than or equal to 90 per cent of the core lengths. This news release refers to properties other than those in which the company has an interest. Mineralization on those other properties is not necessarily indicative of mineralization on the company's properties. All chemical analyses are completed for the company by SRC Geoanalytical Laboratories in Saskatoon, Sask. For additional information regarding the company's Larocque East project, including its quality assurance and quality control procedures, please see the technical report dated effective May 15, 2019, on the company's profile on SEDAR.

About IsoEnergy Ltd.

IsoEnergy is a well-financed uranium exploration and development company with a portfolio of prospective projects in the eastern Athabasca basin in Saskatchewan, Canada. The company recently discovered the high-grade Hurricane zone of uranium mineralization on its 100-per-cent-owned Larocque East property in the Eastern Athabasca basin. IsoEnergy is led by a board and management team with a record of success in uranium exploration, development and operations. The company was founded and is supported by the team at its major shareholder, NexGen Energy Ltd.

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