内蒙古额仁陶勒盖银矿床锰矿物的矿物学初步研究

STUDY ON MANGANESE MINERALS OF E′RENTAOLEGAI SILVER DEPOSIT

额仁陶勒盖银矿床出现的锰矿物主要为软锰矿、水锰矿、六方锰矿、锰铅矿、锰钾矿、菱锰矿、铁菱锰矿及锰方解石。银主要以独立矿物和离子吸附状态的形式赋存于地表锰铅矿和锰钾矿中 ;而软锰矿、六方锰矿、锰铅矿、锰钾矿等锰的氧化物和锰的氢氧化物是原生锰碳酸盐矿物的氧化分解而形成的 ,而水锰矿可能为热液形成 ;菱锰矿等原生锰的碳酸盐类矿物形成于后期热液阶段。

Pyrolusite,cryptomelane,coronadite,psilomelane,nsutite manganese spar,manganite and manganocalcite were found in the E′rentaolegai silver deposit.Silver occurred in form of minerals in the cryptomelane,coronadite,psilomelane with minor silver absorbed in the manganese minerals.The manganese oxides and the manganese hydroxides were formed in the process of manganese calcite decomposition and the nsutite was probably crystallized in the hydrothermal system.Manganite and manganocalcite were crystallized in later hydrothermal stage.