OD6 Metals finds more ‘excellent high-grade’ clay REEs at Splinter Rock Project, Western Australia

ASX-listed company OD6 Metals (ASX:OD6) reports it has found more ‘excellent high-grade’ clay hosted rare earth element (REE) mineralisation at the Splinter Rock Project in Western Australia.

The company says final assays have been received for all the remaining holes in the completed 179-hole drilling program except for 5 non-mineralised holes, and all assays were undertaken using 4 acid soluble digestion which do not return results for resistate non-acid soluble REE minerals.

Significant intercepts logged by OD6 include 17m @ 2,162ppm total rare earth oxide (TREO) from 15m in SRAC0091, 29m @ 1,842ppm TREO from 57m in SRAC0081, 21m @ 1,273ppm TREO from 24m in SRAC0082, and 30m @ 1,203ppm TREO from 30m including 18m @ 1,510ppm TREO from 30m, and 6m @ 909ppm TREO from 54m in SRAC0063.

OD6 Metals Managing Director Brett Hazelden says: “These excellent assay results from the Splinter Rock Project continue to excite, with further range extensions now shown in our maiden drill areas. Two additional prospects have been identified, with 6 in total now intersected from our first round of drilling.

“These excellent assay results from the Splinter Rock Project continue to excite, with further range extensions now shown in our maiden drill areas”

The previously defined Scrum and Prop Prospects now have multiple, perpendicular and parallel drill lines and each cover an area of between 6km by 4km and 13km by 5km respectively. The additional drill lines provide an added dimension to these prospects, with results continuing to return clay thicknesses between 10m to 30m, which are also close to the surface. These are vast areas.

Importantly, these assay results continue to validate the basis of our exploration model which hypotheses local clay rare earth mineral enrichment is formed from weathering of granites in the area. Our airborne electromagnetic survey is nearing completion and once the data has been fully assessed we expect to confirm additional, untested future drill targets.

Our attention now turns to prioritising our 6 defined prospects for advancement in the next phase of exploration drilling. We are working towards delineation of a potential mineral resource estimate (MRE) that optimises key economic factors such as metallurgical recoveries, acid consumption, depth of the shallow cover, stripping ratio, head grade and mineralised thickness.”

OD6 Metals reports 2 additional prospects have been defined, in addition to the original 4 significant prospects previously reported. All 6 prospects have been identified from the drill program, each of which span an ‘extensive’ 4km to 13km in drilled width and lie interspersed between granite outcrops.

Extensive clay vertical thickness generally varies between 10m to 30m and up to 80m and starts in the near-surface. All prospects include holes with grades and intervals greater than 20,000ppm TREO metres representing a ‘significant’ accumulation of mineralised clay-hosted REE deposits. All zones are open orthogonal to drill loans and are anticipated to extend laterally over several kilometres.

These 6 prospects include the Scrum, Centre, Flanker, Prop, Full Back, and Wing prospects, with Full Back and Wing being newly identified.

OD6 states assays received from 35 of the 67 holes have returned ‘significant’ TREO grades and thickness using a 750ppm cut-off grade with clay thickness intervals up to 39m, with magnetic REE oxides (MREO) making up an average of 22.3%, critical REE oxides (HREO) averaging 24.7%, and heavy REE oxides (HREO) averaging 11.5%.

Assays received from 60 of the 65 holes have returned ‘significant’ TREO grades and thickness using a 300ppm cut-off with clay thickness intervals ranging to 66m. MREOs make up an average of 21.5%, CREOs average 24.1% and HREOs make up 11.7%.


The Splinter Rock Project is a 2,579km-square tenement package located around 150km northeast of Esperance in Western Australian. The clay hosted REE mineralisation is currently inferred to be a mobilised weathering product of the REE enriched Booanya granite suite.

Based on historic work and compilation of a target geology, OD6 says the target area at splinter rock covers over 40km by 60km making it one of the largest known clay hosted REE targets in Australia.

The remaining pending assays for 5 non-mineralised holes are expected to be received over the coming weeks, concluding the initial assaying program at Splinter Rock.

After this, OD6 will complete an airborne electromagnetic survey and data analysis, metallurgical sampling and testing at ANSTO, a mineralogical assessment at Murdoch University, and lastly an infill drilling program planned on existing and new lines to expand prospect areas.

OD6 Metals is an Australian exploration and development company focused on its wholly owned Splinter Rock and Grass Patch projects, both located in the Goldfields-Esperance region of Western Australia.

Images: OD6 Metals Ltd
Written By Harry Mulholland
Hailing from the Central Coast region of NSW, Harry is a passionate journalist with a background in print, radio and ESG news. When not bashing away on his keyboard, he can be found brewing a coffee or playing with his dog.