Heavy Rare Earths Limited (ASX:HRE) has obtained highest rare earth assay grades to date at its wholly-owned Cowalinya rare earth project in the Norseman-Esperance region of Western Australia.
The company has received assays from another 49 air core holes of the now completed 438-hole exploration and resource expansion drilling programme.
This brings the total number of holes reported to 141, nearly one third of all holes drilled during the 2022 campaign.
The latest batch reported by LabWest Minerals Analysis features the highest-grade assay returned in drilling on the Cowalinya project to date: 0.72% TREO over 2m in hole AC225.
Hole AC225 is located 900m west of the Cowalinya South resource and sits amongst a cluster of 10 mineralized holes on two adjacent 400m-spaced drill lines (6359400N and 6359800N).
This cluster could represent the northern continuation of the 2km-wide zone of rare earth mineralization encountered in 11 consecutive holes AC190-AC201 1.2km to the south.
The 10 intercepts that define this newly discovered coherent zone of mineralization are as follows:
• AC211: 17m @402 ppm TREO from 20m
• AC212: 14m @1022 ppm TREO from 22m
• AC213: 12m @748 ppm TREO from 17m
• AC214: 5m @634 ppm TREO from 22m
• AC215: 4m @434 ppm TREO from 31m
• AC38 (drilled in 2021 and re-assayed in 2022): 9m @544 ppm TREO from 12m
• AC223: 17m @1069 ppm TREO from 11m
• AC224: 12m @509 ppm TREO from 9m
• AC225: 14m @3217 ppm TREO from 16m (incomplete)
• AC226: 14m @473 ppm TREO from 12m (incomplete).
Significantly, rare earth mineralization remains open at depth in holes AC225 and AC226 with assays not yet reported for the 30m – 35m depth interval in hole AC225 and for 26m – 54m in hole AC226. In addition, the mineralized zones have not been strike constrained with rare earth assays pending for some 90 holes west of 432600E between 6357800N and 6359800N.
To the east of the Cowalinya South deposit, further evidence emerges of a second new zone of mineralization. The mineralized horizon that grades as high as 895ppm TREO in holes AC243-AC248 in the north-east corner of HRE’s tenement has the potential to link with recently reported mineralization drilled in holes AC178-AC181 800m to the south.
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