滇东南老乌锰矿床地球化学特征及其成因制约

Bulletin of Mineralogy, Petrology and Geochemistry(2016)

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Abstract
为查明滇东南老乌锰矿的成矿环境、锰质来源及矿床成因,本文对该矿床开展了系统的矿物学、元素地球化学和同位素地球化学研究.结果表明,矿石品位为12.18%~41.24%;锰矿物组合特征为氧化锰矿与碳酸锰矿混生,其中氧化锰矿以褐锰矿为主,碳酸锰矿主要为钙菱锰矿、锰方解石、锰白云石等,可见少量含锰硅酸盐矿物;成矿环境为陆缘与盆缘接壤的边缘斜坡相的中低盐度浅海沉积环境,成矿物理化学条件主要为在弱氧化-弱还原之间起伏变化;主要成矿方式为陆源沉积成矿基础上叠加热液和生物作用成矿.
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Key words
Laowu manganese deposit,genesis,geochemistry,Southeastern Yunnan
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