Artisanal mining recovered the PGM from small rivers known locally as Big Water, and the Alako in the York area and ... (mineral assemblage, size, composition and surface features) of alluvial PGM led to proposals of a neoform origin for such PGM. This view has been taken during studies in Minas Gerais, Brazil (Hussak, Reference Hussak 1906; Cassedanne and Alves, Reference Cassedanne and Alves ...