| 滇东南中三叠统法郎组锰矿床微生物成因的新证据 |
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| 引用本文： | 杜秋定,伊海生.滇东南中三叠统法郎组锰矿床微生物成因的新证据[J].地质科技情报,2009,28(5). |
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| 作者姓名： | 杜秋定 伊海生 |
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| 作者单位： | 1. 中国地质调查局成都地质矿产研究所,成都,610082
2. 成都理工大学沉积研究院,成都,610059 |
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| 基金项目： | "十一五"国家科技支撑计划项目 |
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| 摘 要： | 在滇东南中三叠统拉丁阶法郎组锰矿床的矿石中一般都可以观察到鲕、豆状结构,同心环带构造.对采自这一地区的斗南、岩子脚、老乌等典型矿床的锰矿石样品进行了系统的薄片显微镜和扫描电镜观察,同时应用阴极发光技术对有代表性的样品进行了分析.根据对鲕、豆状结构矿石显微结构特征的研究发现,这些矿石中的鲕、豆状结构是蓝绿藻类微生物凝聚形成的显微叠层构造,具有核形石特有的核心和包壳,其明暗纹层相间的显微结构特征可以与现代深海大洋铁锰结核类比,初步研究结果表明,该区锰的富集可能与微生物活动密切相关.
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| 关 键 词： | 锰质核形石 阴极发光 微生物成因 中三叠统法郎组 滇东南地区 |
New Microbiological Origin Evidence of Manganese Deposit in the Falang Formation of Middle Triassic,Southeast Yunnan |
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| DU Qiu-ding,YI Hai-sheng.New Microbiological Origin Evidence of Manganese Deposit in the Falang Formation of Middle Triassic,Southeast Yunnan[J].Geological Science and Technology Information,2009,28(5). |
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| Authors: | DU Qiu-ding YI Hai-sheng |
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| Institution: | 1.Chengdu Institute of Geology and Mineral Resources;China Geological Survey;Chengdu 610082;China;2.Institute of Sedimentary Geology;Chengdu University of Technology;Chengdu 610059;China |
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| Abstract: | The manganese deposit of Ladinian Falang Formation of the Middle Triassic lies in southeast Yunnan.Concentric rings structure are obviously observed in oolitic and pisolitic manganese ores.The thin sections from manganese ore samples are systematically observated from typical deposits in Dounan,Yanzijiao and Laowu.The microstructures of oolitic and pisolitic ores are described on the observation of microscope.The cathodeluminescence and SEM(scanning electron microscope) are firstly used to distinguish micro... |
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| Keywords: | manganese oncolite cathodeluminescence microbiogenic Falang Formation of Middle Triassic Southeast Yunnan |
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