O3 Mining Provides Progress Update on Pre-Feasibility Study for Marban Engineering

TSXV: OIII | OTCQX: OIIIF – O3 Mining TORONTO, June 7, 2022 /PRNewswire/ – O3 Mining Inc. (TSXV: OIII) (OTCQX: OIIIF) (“O3 Mining” or the “Corporation) is pleased to provide a progress update on the mining, metallurgical, geomechanical, geotechnical, environmental and community engagement…