Further to the report of February 20, below, IsoEnergy reports additional results from the winter 2020 drilling program at the Hurricane zone. The Hurricane zone is a new discovery of high-grade uranium mineralization on the Company’s 100% owned Larocque East property (the “Property”) in the Eastern Athabasca Basin of Saskatchewan.
Highlights to date (additional lab results pending):
- Assays received from previously reported drill hole LE20-40 average 20.5% U3O8 over 4.0 meters from depth of 322.5 to 326.5 meters bg.,
- The last six drill holes at the Hurricane zone all intersected thick intervals (>7 meters) of strong uranium mineralization, including two with off-scale sub-intervals (>65,000 CPS on the RS-125 hand-held spectrometer),
- Assays from the final six drill holes at the Hurricane zone are still pending.
Drill hole LE20-40 was completed on section with (and 8.5 meters south of) previously reported drill hole LE20-34 (8.5 meters @ 33.9% U3O8) to evaluate the extent of high-grade mineralization to the south of that drill hole. It successfully intersected 4.0 meters of strong uranium mineralization that averages 20.5% U3O8 from depth of 322.5 to 326.5 meters, including a sub-interval of very strong mineralization that averages 53.8% U3O8 over apparent thickness of 1.5 meters.
Drill holes LE20-36 and 38 (Hurricane Section 4460E)
Drill holes LE20-36 and 38 were completed on section 4460E as follow-ups to the north and south, respectively, of mineralization previously reported in drill hole LE20-30 (5.5 m @ 7.1% U3O8). Radioactivity in these drill holes was reported previously. Drill hole LE20-36 was completed 15 m north of LE20-30 and it intersected 3.7% U3O8 over 1.0 m from 332.5 to 333.5 m, toward the northern margin of the Hurricane zone. Drill hole LE20-38 was completed 14 m south of LE20-30 and intersected 7.5m @ 2.0% U3O8 from 319.5 to 327.0 m.
Drill holes LE20-42 and LE20-44 (Hurricane Sections 4410E and 4460E, respectively)
Drill holes LE20-42 and 44 were completed 16 m west and 36 m east, respectively, of strongly mineralized drill hole LE20-34. Both drill holes intersected weak uranium mineralization averaging 0.4% U3O8 over 3.0 m in LE20-42 and 0.3% U3O8 over 1.5 m in LE20-44. These drill holes are interpreted to be just north of the trend of higher-grade mineralization intersected in drill hole LE20-34.
New Intersections of Anomalous Radioactivity
Drill Hole LE20-51 (Hurricane Section 4510E)
Drilled on section with, and 8 m south of drill hole LE20-32A, drill hole LE20-51 was designed to evaluate the potential for additional high-grade mineralization south of that drill hole. LE20-51 successfully intersected a 7.5 m thick zone of strong uranium mineralization from 322.5 to 330.0 m that includes a 3.0 m subinterval of continuous mineralization measuring >30,000CPS (RS-125) . The subinterval contains abundant “worm-rock” textured intergrowths of pitchblende and hematite along with common nickel mineralization.
Drill Hole LE20-52 (Hurricane Section 4435E)
This drill hole was designed to evaluate the potential for additional high-grade mineralization to the south of drill holes LE20-40 and LE20-34. It successfully intersected 7.5m of strong uranium mineralization from 318.5 to 326.0m, 7m south of drill hole LE20-40 (Figures 2 and 3). The interval includes 1.5m of continuous off-scale radioactivity on the RS-125.
Drill Hole LE20-53 (Hurricane Section 4410E)
Completed 25 m along-strike to the west of drill hole LE20-52, this drill hole successfully intersected 10.5 m of strong uranium mineralization from 317.5 to 328.0 m. The intersection includes a 3.0 m subinterval of very strong uranium mineralization measuring >20,000 CPS (RS-125). It also includes a 0.5 m zone from 326.0 to 326.5 m that is off-scale on the RS-125.
Drill Holes LE20-46 and LE20-48 (Hurricane Section 4485E)
These drill holes were designed to evaluate the potential for additional high-grade uranium mineralization to the north and south of drill hole LE19-12. Both of the drill holes intersected thick intervals of uranium mineralization. Drill hole LE20-46 intersected 10 m (from 318.0 to 328.0 m) of strong uranium mineralization 6 m north of LE19-12, including 2.0 m that averages >20,000 CPS (RS-125). Drill hole LE20-48 intersected 11.5 m (from 316.0-317.5 m) of uranium mineralization 12 m south of LE19-12, including 0.5 m that averages >20,000 CPS (RS-125).
Drill Hole LE20-49 (Hurricane Section 4510E)
Drilled 15 m north of drill hole LE20-32A, drill hole LE20-49 intersected 9 m of uranium mineralization from 320.5 to 329.5 m, including 1 m that averages >10,000 CPS (RS-125).
Drilling to the East of the Hurricane Zone
Drill holes LE20-43, 45A, 47 and 50 were completed up to 1.6 km east of the Hurricane zone. Although no uranium mineralization was intersected, several important features were observed in the drill core that will require follow-up drilling in the area. These include strong graphitic brittle faults in the basement and strong sandstone alteration zones similar to those associated with uranium mineralization at the Hurricane zone. Geochemical analyses from the fault zones and alteration haloes are pending.
Next Steps
Winter drilling is now complete at the Larocque East property. Assays for the final six drill holes completed at the Hurricane zone are pending. Data compilation and interpretation are underway. Plans for a summer drilling program that will continue to define the extent of the Hurricane zone are being developed.
The Larocque East Property and the Hurricane Zone
The 100% owned Larocque East property consists of 20 mineral claims totaling 8,371 ha and is not encumbered by any royalties or other interests. 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 Property covers a 15-kilometer-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 neighboring 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. Dimensions are currently 575 m along-strike, 40 m wide and up to 11 m thick. The zone is open for expansion along-strike to the east and on most sections.
Mineralization is polymetallic and commonly straddles the sub-Athabasca unconformity 320 m below surface. The best intersection to date is 33.9% U3O8 over 8.5 m in drill hole LE20-34. Drilling at Cameco Corp.’s Larocque Lake zone on the neighboring property to the southwest has returned historical intersections of up to 29.9% 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 330 m 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.
Managed & Built by I2M Consulting, LLC | © 2010-
