Infinity Mining (ASX:IMI) reports it has defined exploration targets for rubidium (Rb) mineralisation with up to 6,489ppm Rb (0.724% Rb2O) at surface within exposed weathered pegmatites over its Tambourah South tenement in Western Australia.
The rubidium was identified following a review into the company’s initial assay results of a recent field rock chip sampling program over the western side of Tambourah South.
A total of 47 samples (21% of the initial assays) also returned greater than 0.25% Rb2O.
Infinity Mining reports this result also exhibited a large proportion of the samples with anomalous Rb, including 59% of the samples with greater than 1,000ppm Rb.
Infinity Mining CEO Joe Groot said Infinity is working on identifying the commercial potential of the mineralised system.
“The Tambourah South Tenement continues to bare out with consistently high-grade results for not only lithium, but now rubidium.
“The Tambourah South Tenement continues to bare out with consistently high-grade results for not only Lithium, but now rubidium”
The team are totally committed to leaving no stone unturned when it comes to identifying the commercial potential for this lithium and rubidium mineralised system.”
Infinity notes the Rb mineralisation is associated with previously announced pegmatite hosted lithium mineralisation.
The high Rb content plus the presence of anomalous beryllium (Be), ceasium (Cs), and tantalum (Ta) within the rock samples is indicative of highly fractionated complex rare element pegmatites.
Ongoing mapping, rock and lag sampling, plus possible soil sampling is carried out to support the drilling program as Infinity continues to identify less obvious and concealed pegmatites and re-assay’s selective rock samples for rare earth elements (REE).
Infinity has a Program of Works currently in place for a total of up to 2,500m of reverse circulation (RC) drilling over the existing mineralised pegmatites following the discovery of high-grade lithium.
Preparatory earthworks for the drilling will commence this month following the completion of a Heritage Survey carried out in conjunction with the Palyku People.
Samples for the assay were taken from 36 weathered outcropping pegmatites with over a 2.6km of strike length.
A main zone of Rb rich pegmatites is south western of the tenement, and ‘lower-grade’ zones have been found in the central western and north western parts of the tenement however results from additional samples taken from the central area are still awaited.
Undulating to steep topography in the region varies the exposure level of the host pegmatites, and poorly exposed pegmatites were identified under colluvium and alluvium suggesting that additional concealed pegmatites could also exist in and between these zones.
Infinity Mining holds 100% interest in 711km-square of tenements in the Pilbara and Central Goldfields regions of Western Australia, comprising 10 exploration licences, 2 mining leases, and 7 prospecting licences.
The tenements are located in ‘highly-prospective’ gold-copper-lithium terranes. Historically, Infinity has spent $5.5 million on exploration of these tenements.
Its company’s business strategy is to develop near-term gold targets in the Central Goldfields to support the longer-term investment needed to develop the Pilbara tenements (lithium, gold, and copper projects).
Macarthur Minerals (ASX:MIO) holds 21.65% of the issued equity in Infinity.
Macarthur’s spinoff to Infinity Mining of its non-core renewable energy assets in 2021 has allowed Macarthur to commit its full focus to its flagship Lake Giles Iron Project in Western Australia.
Images: Infinity Mining Ltd & iStock
