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木圭松软锰储量较大,属难选贫锰矿类型. 有关单位曾先后对该矿物质组成进行过较深入的研究.1965年中南矿治学院地质系的研究指出:松软锰是高硅高铁氧化锰矿,以偏锰酸矿为主,夹有少量硬锰矿及锰土,还有褐铁矿.锰及大部分铁都穿插共生其中,呈胶状凝集.矿石中大部分硅呈微粒石髓包裹于偏锰酸矿颗粒中,少量高岭土也类似镶嵌.
Muguisu large reserves of soft manganese, which is refractory to the type of poor manganese ore.The unit has successively conducted a more in-depth study of the composition of the minerals.In 1965 Zhongnan Mining Institute Department of Geology of the study pointed out: soft manganese is high-silicon high-speed iron oxidation Manganese ore, with partial manganese ore as the main, with a small amount of hard manganese and manganese soil, as well as limonite, manganese and most of the iron interspersed intergrowth which was gel-like agglomeration. In the partial manganese ore particles, a small amount of kaolin is also similar inlaid.