Heavy Rare Earths

Highest Grade Rare Earths To Date At Cowalinya Project

Heavy Rare Earths Limited (“HRE” or “the Company”) is pleased to report assays from another 49 air core holes of the now completed 438-hole exploration and resource expansion drilling program at its 100 per cent-owned Cowalinya rare earth project in the Norseman-Esperance region of Western Australia.


  • Assays received for additional 49 holes from HRE’s rare earth exploration and resource expansion drilling program at Cowalinya
  • Highest rare earth assay at Cowalinya to date – 7222 ppm TREO
  • Rare earth grades exceed the Cowalinya resource grade (625 ppm TREO) in thick intervals of up to 22 metres in 35 drill holes. New intervals include:
    • AC225: 14 metres @ 3217 ppm TREO (32.5% magnet REOs) from 16 metres
      • including 6 metres @ 5848 ppm TREO from 24 metres
    • AC221: 10 metres @ 2087 ppm TREO (25.1% magnet REOs) from 17 metres
      • including 4 metres @ 4266 ppm TREO from 17 metres
    • AC223: 17 metres @ 1069 ppm TREO (26.3% magnet REOs) from 11 metres
      • including 4 metres @ 1897 ppm TREO from 23 metres
    • AC212: 14 metres @ 1033 ppm TREO (29.0% magnet REOs) from 22 metres
      • including 4 metres @ 2040 ppm TREO from 24 metres
    • AC244: 7 metres @ 895 ppm TREO (30.9% magnet REOs) from 20 metres
  • Evidence continues to build for substantial zone of rare earth mineralisation west of Cowalinya South deposit
  • Rare earth mineralisation not strike constrained in newly discovered western zone
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 2 metres in hole AC225. Hole AC225 is located 900 metres west of the Cowalinya South resource1 and sits amongst a cluster of 10 mineralised holes on two adjacent 400 metre-spaced drill lines (6359400N and 6359800N; see Figure 1). This cluster could represent the northern continuation of the 2-kilometre-wide zone of rare earth mineralisation encountered in 11 consecutive holes AC190-AC201 1.2 kilometres to the south (refer to ASX announcement 3 January 2023). The 10 intercepts that define this newly discovered coherent zone of mineralisation are as follows:

  • AC211: 17 metes @ 402 ppm TREO from 20 metres
  • AC212: 14 metres @ 1022 ppm TREO from 22 metres
  • AC213: 12 metres @ 748 ppm TREO from 17 metres
  • AC214: 5 metres @ 634 ppm TREO from 22 metres
  • AC215: 4 metres @ 434 ppm TREO from 31 metres
  • AC38 (drilled in 2021 and re-assayed in 2022): 9 metres @ 544 ppm TREO from 12 metres
  • AC223: 17 metres @ 1069 ppm TREO from 11 metres
  • AC224: 12 metres @ 509 ppm TREO from 9 metres
  • AC225: 14 metres @ 3217 ppm TREO from 16 metres (incomplete)
  • AC226: 14 metres @ 473 ppm TREO from 12 metres (incomplete).
Significantly, rare earth mineralisation remains open at depth in holes AC225 and AC226 with assays not yet reported for the 30-35 metre depth interval in hole AC225 and for 26-54 metres in hole AC226 (Figure 2). In addition, the mineralised 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 mineralisation. The mineralised horizon that grades as high as 895 ppm TREO in holes AC243-AC248 in the north-east corner of HRE’s tenement (see Table 1 and Figure 1) has the potential to link with recently reported mineralisation drilled in holes AC178-AC181 800 metres to the south (refer to ASX announcement 3 January 2023).

Assays for the remaining 297 drillholes, including those in the central and northern parts of the tenement, will be reported by the Company as results are received.


Click here for the full ASX Release

This article includes content from Heavy Rare Earths, licensed for the purpose of publishing on Investing News Australia. This article does not constitute financial product advice. It is your responsibility to perform proper due diligence before acting upon any information provided here. Please refer to our full disclaimer here.

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