The Larocque East property, home of the newly discovered Hurricane zone, consists of 6 mineral claims totaling 3,200 hectares and was recently purchased in May, 2018. The unencumbered property is owned 100% by IsoEnergy. Larocque East is located 35 kilometres northwest of Orano Canada’s McClean Lake uranium mine and mill and is immediately adjacent to, but not quite contiguous with, the north end of IsoEnergy’s recently expanded Geiger property.
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 in several occurrences to the southwest of the Larocque East property. The closest of these are the Larocque Lake and Larocque 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 historic 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 0.8 metres in drill hole Q22-16. 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 major uranium deposits in the eastern Athabasca Basin. Importantly, the sandstone cover is thin, ranging between 140 metres and 330 metres in previous drilling. A total of 23 historic drill holes have been completed on the property along approximately 22 kilometres of graphitic conductors. Five historic drill holes have intersected weak uranium mineralization on the Larocque East property to date, including drill holes KER-07 (0.12% U3O8 over 0.1 metre) and KER-11 (0.06% U3O8 over 0.5 metre) near the western property boundary, within the general vicinity of 2018 drill hole LE18-01A.
The Hurricane zone was intersected by drill hole LE18-01A, recently completed as IsoEnergy’s first ever drill hole at Larocque East and the final drill hole of the 8 hole summer drilling program, which included 7 holes at the Geiger property.
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.
The uranium mineralization is associated with clay and hematite and is surrounded by moderate to strong hydrothermal alteration envelopes in the sandstone and basement. Strong faulting in the basement is likely the cause of a 15 metre offset in the unconformity between LE18-01A and historic drill hole KER-12.
Mineralization is open along strike, limited only by the property boundary 165 metres to the southwest, and drill hole KER-07, 415 metres to the northeast. KER-07 was likely drilled too far to the north to hit the prospective horizon. On section, the mineralization is limited only by drill hole KER-12, located 57 metres to the southeast.
Larocque East Property Map
LE18-01A Cross Section
LE18-01A Uranium Mineralization Core Photo