Metallum Resources Inc. announced that it has signed an agreement with First Quantum Minerals Ltd. (FQML) to extend the Company's option to purchase the Winston Lake portion of the Superior Zinc and Copper Project. The option has been extended until the earlier of February 2023, or when an updated Closure Plan for Winston Lake is approved by the mining authorities and an updated Closure Financial Assurance is determined. Under the extension terms, the Company may exercise the option by assuming responsibility for the updated Closure Financial Assurance, and FQML will reimburse Metallum for any amount over C$3M in assurance required.