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美国矿山局正在通过野外勘查、矿物特性鉴定、选矿与水冶试验对阿肯色中西部矿区的钴和锰资源进行研究。这些结构受控的矿床位于Ouachita山脉,沿着形成山脊的背斜轴埋藏。角砾均密石英岩胶结有各种氧化锰的混合物,主要是钾硬锰矿和锂硬锰矿,钴富集在锂硬锰矿内,它是一种特殊的氧化锰矿相。原矿样化学分析结果为:锰25％、钴0.17％。磁选产品含锰41％、钴0.22％,其回收率分别为95％和93％。
The US Bureau of Mines is investigating the cobalt and manganese resources in the central and western Arkansas mining area through field exploration, mineral characterization, beneficiation and hydrometallurgy tests. These structurally controlled deposits lie in the Ouachita Mountains and are buried along anticline axes that form ridges. The brecciated homogeneous-dense quartzite is cemented with a mixture of various manganese oxides, mainly potassium and manganese, and cobalt is enriched in lithium-manganese ore and is a special manganese oxide phase. Chemical analysis of the ore sample results in 25% manganese and 0.17% cobalt. Magnetic separation products containing 41% manganese, 0.22% cobalt, the recovery rates were 95% and 93%.