Aftermath Silver Ltd. provided an update on on-going metallurgical test work on mineralized rock from its Berenguela Ag-Cu-Mn project in southern Peru underway at Kappes Cassiday and Associates' (KCA) Reno facility. The Company has prepared 16 composite samples of mineralized drill core from its 2021-2 drill program, representing the key geometallurgical domains identified in the NI43-101 resource estimate published April 12, 2023. Eight samples consist of crushed drill core for direct leaching tests and a further 8 samples consist of uncrushed core samples for possible ore sorting tests prior to leaching.
The initial test work was carried out on sample RD2MINA, from geometallurgical domain 2. Recent test work focused on sample RD4LOWA, from geometall surgical domain 4, which has roughly twice the combined content of calcium and magnesium of RD2MINA, and approximately half the content of manganese. Test results have successfully confirmed that, despite the wide range of metal content, both samples can be processed using the same treatment route outlined for RD2MINA. Detailed leaching and purification parameters derived from the first round of test work were successfully applied to RD4LOWA indicating that the entire range of material of lower dolomite content in the resource assaying <12% Ca+Mg can be processed by direct leaching methods, potentially without ore sorting - this represents approximately 33% of the contained Mn in M&I. Overall manganese recovery exceeds 94%.
