The assets, worth about $1.2 billion, include Mineracao Corumbaense, Mineracao Mato Grosso, International Iron Company and Transbarge Navegacion ventures.
IGO says its takeover of nickel producer Western Areas might fall through after an independent expert concluded the offer was "neither fair nor reasonable".
Canada last month announced financial support for building two facilities that will make battery materials for electric vehicles, and one battery gigafactory.