Appia Announces Preliminary Desorption Results and Confirms

time: 2024-05-14

Appia Announces Preliminary Desorption Results and Confirms Ionic Adsorption Clay Rare Earth Mineralization in Brazil
Toronto, Ontario--(Newsfile Corp. - May 6, 2024) - Appia Rare Earths & Uranium Corp. (CSE: API) (OTCQX: APAAF) (FSE: A0I0) (MUN: A0I0) (BER: A0I0) (the "Company" or "Appia") announced today the confirmation of the presence of Ionic Adsorption Clay (IAC) rare earth elements (REE) at the PCH project. A total of 100 samples were sent to AGS Laboratories in La Serena, Chile and the results consistently indicated that the regolith developed over the Ipora Granite presented significant recoveries for Magnet Rare Earth Oxides (MREO) and Heavy Rare Earth Oxides (HREO) consistent with the expected profile of an IAC ore.
Stephen Burega, President, commented, "We are very excited with the recoveries of this first phase of testing. The desorbable Magnet and Heavy Rare Earth recoveries achieved in these initial desorption tests confirm high-grade ionic adsorption clay characteristics which compare very favourably to commercially viable operations in China and globally. We will now work towards fine-tuning the process to increase the level of recovery. Appia is confident that the expansion of our exploration efforts across the PCH project area will uncover many new targets exhibiting this same IAC profile and desorbability."
Samples selected from the different geological frameworks, and at distinctive grades, has led to the characterization of two REE mineralization styles. One is associated with the regolith originated from the weathering of the Ipora Granite intrusion, in which the IAC developed and favourable desorbability is present, and one is associated with a carbonatite intrusion-dyke with grades of from 269.7 to 95,156 parts per million (PPM) Total Rare Earth Oxide (TREO) (see Map 1).
Selected samples from Reverse Circulation (RC) drill holes showed TREO grades ranging from 1,236 ppm to 39,881 ppm and Total Desorbable Rare Earth Oxides (TREO D) ranging from 178.9 ppm to 1,617.8 ppm. The representative results from the desorption tests are presented in Table 1 below. The full set of results are included in this LINK.
Desorbable values from RC holes located in the weathered portion of the Ipora Granite show representative preliminary desorption results among the REE (Map 2) with Nd2O3 and Pr2O3 ranging from 0.5 ppm to 451.2 ppm, from 0.1% to 48.2% recovery, and Tb4O7 and Dy2O3 ranging from 0.2 ppm to 70.2 ppm, from 0.6 to 86.7% recovery (Table 1).
These favourable REE desorption results within the regolith open the potential to identify new targets across Appia's very large project area of +40,000 ha which strategically cover the majority (71.4%) of the Ipora Granite extension in the region. (See map 3)
The results presented are preliminary, and Appia's team will work to optimize the desorption process for future testing to maximize recoveries while minimizing operating and capital costs. As part of this process, samples from entire RC holes from Target IV and Buriti Zones as well as from selected new exploratory targets are being prepared to be sent for desorption test work.
Desorbability results were conducted using Ammonium Sulfate at 0.5M, pH4, for 20 minutes. No QAQC samples were introduced in this preliminary desorbability test.

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