Zambia’s state mining investment company ZCCM Investments Holdings (ZCCM-IH) has entered into a joint venture with mining services firm Array Metals to process production from a gold deposit, the company said in a statement on Wednesday. Africa’s second-largest copper producer, Zambia is trying to diversify its revenue base, and aims to produce 40 000 kg of gold in 2020 from primary and secondary sources including gold bought from small-scale miners.