G50 Corp Gallium Grades Double in Arizona Proof-of-Concept

Earlier mineralogical work found that about 88% of Golconda's gallium was hosted in muscovite, the mica mineral that forms the main target for concentration. Sulphide flotation of deslimed material increased gold grades by about 10 times and silver grades by about five times. Gold recovery ranged from 70% to 90%, silver recovery from 30% to 50%. The single-stage open-cycle test showed selectivity for gold and silver minerals, though most silver had already moved to the fine fraction before flotation.

Separate mica flotation upgraded gallium by two to five times from the feed. The company recovered 40% to 50% of the gallium into about 10% to 20% of the flotation feed mass. G50 Corp identified scope to use scavenger flotation to lift overall gallium recovery and cleaner flotation to improve concentrate grades as it develops the preliminary flowsheet.

Golconda hosts gold, silver, zinc and gallium mineralisation over an area roughly 1,300 metres long, 400 metres wide, extending to about 400 metres depth. The current program remains preliminary and used a limited number of surface samples. It does not establish a mineral resource, ore reserve, or the technical and commercial viability of a development.

Mineralogy and liberation studies on the oxide material are ongoing. Geochemistry work includes comparing impurity-to-gallium ratios with gallium products from aluminium and zinc processing. Further metallurgical testing will seek broader deposit representation and assess variability. Additional drilling and sampling may follow from current project studies.