Pure copper ingots unlock secrets of Iron Age trade routes
Elemental and lead isotope analyses of ancient copper ingots unlocked secrets of Early Iron Age trade routes and how Indigenous Mediterranean communities functioned 2,600 years ago.
Proven and probable copper mineral reserves increased by 21% since the end of 2018 to 11.8 billion pounds, while gold mineral reserves gained 12% to reach 7.4 million ounces.