VANCOUVER, BC, Sept. 12, 2022 /PRNewswire/ – First Mining Gold Corp. (“First Mining” or the “Company”) (TSX: FF) (OTCQX: FFMGF) (FRANKFURT: FMG) is pleased to provide an updated Mineral Resource Estimate (the “MRE”) on the Duparquet gold project (“Duparquet” or the “Project”) located in…