How big? Ultrafine soil sampling hints at ‘size and scale’ of Summit’s Stallion rare earth project | spcilvly

  • SUM ultrafine soil analysis at Stallion confirms northward exploration potential
  • Multiple rare earth oxides (REO) anomalous results returned spanning 4 km
  • Results support Phase 2 drilling that confirmed widespread REE mineralization
  • Considered provisional inaugural resource before phase 3 drilling

UltraFine+ soil testing has confirmed further positive exploration north of Summit Minerals’ emerging Stallion Rare Earth Elements (REE) project in WA.

Analyzing soil samples for minerals or pioneer elements is a technique used by explorers to identify potential drilling targets.

Traditionally, particles of about a quarter of a millimeter (or 250 microns) were considered the smallest fraction of soil to analyze.

Developed by the big brains at CSIRO and now widely used by industry, the UltraFine+ process collects and analyzes particles. less than two microns in size.

To put it in context, a piece of dust that can be seen with the naked eye measures around 25 microns.

“These ‘ultrafine’ soil particles, such as clays and iron oxides, have more surface area that can bind gold and other metals moving in the environment and thus form geochemical signatures of deposits that lie many meters below soil or sand,” says the CSIRO.

Stallion: a growing rare earth game

Yesterday Summit Minerals (ASX:SUM) announced it had completed a 14-hole drilling campaign at Stallion, returning up to 1,664 ppm TREO and confirming widespread rare earth mineralization that remains open along strike to the north.

And it appears that the north is where the exploration potential lies, with new soil sampling using the UltraFine+ technique uncovering an additional REE (MHC Target) mineralized zone.

A total of 113 UFF samples were collected at Stallion and extended northward over the MHC target, interpreted from review of Manhattan Corporation‘s (ASX:MHC) historic drilling.

Numerous rare earth oxide (REO) anomalous results were obtained spanning 4 km, confirming that the MHC target could unlock greater potential to grow the project.

“The company is pleased to receive positive ground responses from these complex regolith environments,” said exploration manager Jonathan King.

“The strong spatial coincidence between the anomalous soils and REO mineralization indicated by recent and historical drilling, separated by up to 40 meters of coverage, is an exciting development for Summit.

“The knowledge gained from this campaign gives the company confidence in the size and scale of the potential resource.

“It also helps us better target future drilling, which should significantly reduce future discovery and exploration costs across the property package.”

Summit Minerals
Anomalous soils (>250ppm TREO) over anomalous perforations (MHC >500ppm pREO and SUM >500ppm TREO). Source: Supplied (SUM).

Planned drilling at MHC target

The company says results to date support employing the Ultrafine+ technique for targeting work in broader exploration of the properties (which have a combined area of ​​162 km2), reserving cash for drilling only where justified .

An interim initial resource is being considered ahead of a Phase 3 drilling campaign with the aim of growing the mineralized zone by expanding into the adjoining property.

Drilling will also move north to confirm MHC’s target at the Stallion North property.

Metallurgical work will also continue with testing of stronger leaches on the mineralized material before progressing with beneficiation testing and characterization work to define the REE species present and how they are maintained.

This article was developed in collaboration with Summit Minerals, a Stockhead advertiser at the time of publication.

This article does not constitute advice on financial products. You should consider obtaining independent advice before making any financial decisions.

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