Brazilian Critical Minerals

APUI ENE REE

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12 metres @ 1,380 ppm TREO from surface, including 5m @ 1,942 ppm TREO from 7 metres (APTR 013)

3 metres @ 1,130 ppm TREO from surface (APTR 014)

4 metres @ 908 ppm TREO from surface (APTR 018)

A regional reconnaissance auger drilling conducted within two leases recently granted (Figure 4) east of Apuí located a new style of REE mineralisation associated with a sedimentary unit rich in potash.

The highest-grade portion of hole APTR 013 is coincident with a potash-rich zone, grading approximately 7% K2O (Table 3), interpreted as being related to a potassium-rich sedimentary horizon, potentially of significant areal extent. The hole was terminated at 12m in strongly-mineralised saprolite, grading 1804ppm TREO.

The multi-element distribution along the auger hole APTR013 (Table 3) indicates that the highest TREO grades from 7 metres down hole are directly correlated with a potash-rich sediment (7% K2O) anomalous in rubidium, with silica and iron contents typical of a mature glauconitic sandstone which occurs in extensive marine sediments. Glauconite decomposes into halloysite, kaolin and smectite where REEs may be ionic or colloidally hosted.

Uranium and thorium are low, compatible with ionic rare earth mineralisation.

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