Blake, Cassels & Graydon LLP (Blakes), Stikeman Elliott LLP, Cassels Brock & Blackwell LLP, and Sullivan & Cromwell LLP are the legal advisors behind a $4.5 billion mining deal involving BHP and Lundin Mining. This venture aims to expand their copper exploration and mining activities in South America through the acquisition of the exploration company Filo. For more details, visit the original article here.