滇东南老乌锰矿床地球化学特征及其成因制约
Geochemical Characteristics and Their Constraints on the Genesis of the Laowu Manganese Deposit,SE Yunnan,China
查看参考文献63篇
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文摘
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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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其他语种文摘
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In order to explore the metallogenic environment,source of ore-forming materials and genesis of the Laowu manganese deposit in the southeastern Yunnan,a systematic study on the mineralogy,elemental geochemistry,and isotopic geochemistry of the deposit has been carried out in this paper. Results show that Mn grades of ores vary from 12.18% to~ 41.24%. Ores are composed of manganese oxides,mainly braunite,and manganese carbonates,mainly manganocalcite, calcimangite,and kutnohorite,with minor manganous silicates. Orebodies were mainly deposited in a marginal slope facies in the conjunction of the continental and basin margins,in a low salinity neritic sedimentary environment under the physical and chemical condition varying from weak reduction to weak oxidation,with overprints of hydrothermal and biological effects. |
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来源
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矿物岩石地球化学通报
,2016,35(3):540-551 【核心库】
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DOI
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10.3969/j.issn.1007-2802.2016.03.018
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关键词
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地球化学
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矿床成因
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老乌锰矿
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滇东南
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地址
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中国科学院地球化学研究所, 矿床地球化学国家重点实验室, 贵阳, 550002
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1007-2802 |
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学科
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地质学 |
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基金
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国家自然科学基金项目
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中国科学院贵阳地球化学研究所矿床地球化学中国科学院重点实验室基金
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文献收藏号
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CSCD:5746459
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