TORONTO, March 1, 2022 /PRNewswire/ - O3 Mining Inc. (TSXV: OIII) (OTCQX: OIIIF) ("O3 Mining" or the "Corporation") is pleased to provide an updated Mineral Resource Estimate ("MRE") for its 100 percent ("%") owned Marban Project located in Val-d'Or, Qubec, Canada. This MRE includes the results of 39,208 metres of infill and expansion drilling in and around the 2020 Marban Preliminary Economic Assessment ("PEA") pits.