| 滇黔桂典型锰矿床矿相学特征及其对成矿过程的指示 |
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| 引用本文：叶太平,韩雪,陈仁,王敏.2021.滇黔桂典型锰矿床矿相学特征及其对成矿过程的指示[J].地球学报,42(6):945-958. |
| DOI：10.3975/cagsb.2021.091601 |
| 摘要点击次数: 1901 |
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| 基金项目:中国地质调查局地质调查项目(编号: DD20190370-34);中国科学院地球化学研究所矿床地球化学重点实验室开放研究基金项目(编号: 201909);贵州省地质矿产勘查开发局项目(编号: 黔地矿科合〔2018〕29号) |
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| 中文摘要:滇黔桂地区代表性锰矿包括贵州松桃大塘坡锰矿、广西大新下雷锰矿、遵义铜锣井锰矿和云南砚山斗南锰矿。本文利用显微镜、X衍射仪、扫描电镜等仪器, 通过研究滇黔桂地区典型锰矿矿相学特征, 结合碳酸盐岩研究方法, 查明产于南华系大塘坡组第一段(Nh1d1)贵州松桃大塘坡锰矿矿物组合包括菱锰矿、钙菱锰矿、锰白云石、锰方解石、石英、伊利石, 微相为SMF2、沉积相FZ1(盆地相), 形成于沉积环境伸展阶段; 产于上泥盆统五指山组(D3w)广西大新下雷锰矿矿物组合包括褐锰矿、锰钾矿、菱锰矿、钙菱锰矿、蔷薇辉石、透闪石、石英, 微相为SMF2和SMF15-M、沉积相FZ7(台地相), 形成于沉积环境伸展阶段; 产于中二叠统茅口组第二段(P2m2)遵义铜锣井锰矿矿物组合包括菱锰矿、钙菱锰矿、锰方解石、锰白云石、硫锰矿、黄铁矿、闪锌矿、高岭石、伊利石、菱铁矿, 微相为SMF15-C和SMF17、沉积相FZ7(台地相), 形成于沉积环境收缩阶段; 产于中三叠统法郎组(T2f)其矿物成分包括云南砚山斗南锰矿矿物组合包括褐锰矿、水锰矿、钙菱锰矿、含锰方解石、方解石、石英, 微相为SMF4和SMF13、沉积相FZ4(斜坡相), 形成于沉积环境伸展阶段。 |
| 中文关键词:沉积锰矿 矿相学 成矿过程 滇黔桂地区 |
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| Mineragraphy Characteristics of Typical Manganese Deposits and Their Indications for Metallogenic Processes in Yunnan, Guizhou, and Guangxi |
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| Abstract:The representative manganese deposits in Yunnan, Guizhou, and Guangxi include Datangpo manganese deposit in Songtao, Guizhou; Xialei manganese deposit in Daxin, Guangxi; Tongluojing manganese deposit in Zunyi; and Dounan manganese deposit in Yanshan, Yunnan. The mineralogical characteristics of typical manganese deposits in Yunnan, Guizhou, and Guangxi were studied by means of a microscope, X-ray diffractometer and scanning electron microscope, to determine the formation environment of the deposits. The Datangpo manganese deposit in Songtao, Guizhou occurs in the first member (Nh1d1) of Datangpo formation of the Nanhua system, whose mineral assemblage characteristics include rhodochrosite, calcium rhodochrosite, manganese dolomite, manganese calcite, quartz, and illite. The microfacies of the Datangpo manganese deposit is SMF2, while the sedimentary facies is FZ1 (basin facies); these are formed at the extension stage of the sedimentary environment. The Daxin Xialei manganese deposit in Guangxi occurs in the Upper Devonian Wuzhishan formation (D3w), whose mineral assemblage characteristics include limonite, manganese potassium ore, rhodochrosite, calcium rhodochrosite, rosaxene, tremolite, and quartz. The microfacies of the Daxin Xialei manganese deposit are SMF2 and SMF15-M, while the sedimentary facies is FZ7 (platform facies); these are formed at the extension stage of the sedimentary environment. The Tongluojing manganese deposit in Zunyi occurs in the second member of Maokou Formation of Middle Permian (P2m2), whose mineral assemblage characteristics include siderite, calcium siderite, manganese calcite, manganese dolomite, sulfur manganese ore, pyrite, sphalerite, kaolinite, illite, and siderite. The microfacies of the Tongluojing manganese deposit are SMF15-C and SMF17, while the sedimentary facies is FZ7 (platform facies); these are formed at the shrinking stage of the sedimentary environment. The Dounan manganese deposit in Yanshan, Yunnan occurs in the Middle Triassic Franc formation (T2f), whose mineral assemblage characteristics include brown manganese ore, water manganese ore, calcium rhodochrosite, manganese bearing calcite, calcite, and quartz. The microfacies of the Dounan manganese deposit in Yanshan, Yunnan are SMF4 and SMF13, while the sedimentary facies is FZ4 (slope facies); these are formed at the extension stage of the sedimentary environment. |
| keywords:sedimentary manganese deposit mineralogy metallogenic process Yunnan, Guizhou, and Guangxi area |
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