The mine is an open pit mine which has two overlapping mines that produced 772 koz in 2020. 10. Loulo Gounkoto, Mali . Last on our list of the top ten biggest gold mines in the world is Loulo Gounkoto in Mali. The ownership of the open-pit mine has a 80% to 20% split, with Barrick owning the majority and the State of Mali owning the rest.