Gold Mining in Sierra Leone. Sierra Leone has been producing gold for a long time. In both 2016 and 2017, the country produced 188 kg and 125 kg of gold. The average gold production in Sierra Leone from 1990 to 2017 is estimated to be 95 kg. Gold production data of Sierra Leone is updated yearly, and the record update started way back in 1990. Feb 09, 2021 The Minister of Mines and Mineral Resources, Musa Timothy Kabbah, on 3rd February 2021, launched the Komahun Gold Processing Plant, in Nimikoro chiefdom, Kono district, as part of the ceremony marking the start of full-scale gold mining and processing operations by Wongor Investment Mining Company. The plant, which happens to be the biggest gold Jan 27, 2016 Gold mining is one of the oldest activities in Sierra Leone. Just like much of West Africa, gold mining in alluvial deposits dates back to the prehistoric times. Even today, Sierra Leone has the largest deposit of alluvial gold, and mining of this gold has been ongoing throughout human history in the country.