Brazilian Critical Minerals retrieve word-class MREO results at EMO Project

2 April 2024 10:26

Brazilian Critical Minerals‘ (ASX:BCM) has proved its prominence following the return of outstanding recoveries of Magnetic Rare Earth Oxides (MREO) at the EMA Project in Brazil’s Apui region.


Figure 1: Ema project location in the Apui region of Brazil

Metallurgical breakthrough

The metallurgical results for MREO hit 83%, bolstering phase one’s impressive recoveries of key rare earth elements – praseodymium (Pr), neodymium (Nd), dysprosium (Dy), and terbium (Tb).

These results match those of top ionic clay-hosted deposits worldwide, signalling EMA’s potential as a major non-Chinese deposit.

Leaching results

The following results were attained using a standard weak ammonium sulfate leaching solution with a pH of 4, at ambient temperatures, and within a short leach time of only 30 minutes.

Phase 1:

  • 13 metres @ 71% Nd, 62% Pr, 45% Dy and 52% Tb from 5m (TR-071)
  • 5 metres @ 66% Nd, 66% Pr, 52% Dy and 55% Tb from 12m (TR-059)
  • 10 metres @ 65% Nd, 61% Pr, 43% Dy and 50% Tb from 10m (TR-110)

Phase 2:

  • 10 metres @ 76% Nd, 74% Pr, 47% Dy and 54% Tb from 10m (EMA-TR-10)
  • 6 metres @ 66% Nd, 61% Pr, 56% Dy and 83% Tb from 10m (EML-TR-059)

Table 1: Hole EMA-TR-101 with total rare earth head grades and recovered (%) magnetic rare earth oxides


Table 2: Hole EML-TR-052 with total rare earth head grades and recovered (%) magnetic rare earth oxides

Composite samples retrieved from the high-grade zone were delivered to the Australian Nuclear Science and Technology Organisation facility in Sydney for further analysis, with results anticipated to be released in the coming months.

Ionic clay confirmation

The leachability analysis of samples validates extensive ionic clay rare earth mineralisation across the 82km² EMA site.

Specifically, ammonium sulfate leaching results correlate with elevated recovery rates in the highest-grade segments of each mineralised zone.

Notably, terbium and dysprosium exhibit exceptionally high recoveries, underscoring their increased value compared to critical light rare elements praseodymium and neodymium.


Figure 2: Ema-Ema East detailed location map showing ammonium sulphate leached holes > 100ppm MREO

Future outlook

Brazilian Critical Minerals Managing Director Andrew Reid anticipates promising Mineral Resource Estimate results, slated for release by April 2024.

“Very high recoveries achieved through standard ammonium sulphate leaching display stunning results which we believe will help deliver the company a sizeable maiden Mineral Resource Estimate over the coming weeks and we are confident that with our ongoing in-house exploration efforts, we can solidify our position in the rare earth sector,” he said.

Looking forward, the promising returns fuel further progress at the EMA project, paving a clear path to production, especially with approximately 107km² yet to be drilled and tested.

Following the return, Mr. Reid is confident the explorer will soon become a significant competitor within the rare earths sector.

“Phase 2 metallurgical characterisation of the Ema prospect is indeed vindication of the company’s view that it holds a world-class, emerging rare earths project,” he said.

BCM’s Australian Security Exchange-listed share price has risen 4.76% today and is currently trading at $0.022 (10:15 am UTC+ 8 hours).


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