United Manganese of Kalahari (UMK) is a South African company, mining manganese in the John Taolo Gaetsewe District Municipality in the Northern Cape Province of South Africa. The Kalahari manganese fields are regarded as the largest manganese ore deposit globally. Established in 2005, UMK is 51% black owned and is the 4th largest manganese exporter in South Africa. In 2018 the mineral resources were estimated at 607mt with 200mt in measured and indicated categories. Mineral Reserves for Open Pit Mining are estimated at 112mt that provides a life of Open Pit Mine of more than 30 years.
卡拉哈里联合锰业（UMK）是一家南非矿业公司，在南非北开普省John Taole Gaetsewe区的卡拉哈里锰矿区开展业务。卡拉哈里锰矿区被认为是全球最大的锰矿床。该公司成立于2005年，是一家51%黑人控股的公司，是南非第四大锰矿出口商。2018年该公司矿产资源估计为6.07亿吨，其中实测和指示类矿产2亿吨。露天矿的矿产储量估计为1.12亿吨，开采寿命超过30年。