| 煤中微量元素分布特征初步研究 |
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| 引用本文： | 王运泉,杨绍晋.煤中微量元素分布特征初步研究[J].地质科学,1997,32(1):65-73. |
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| 作者姓名： | 王运泉 杨绍晋 |
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| 作者单位： | 1. 中国矿业大学北京研究生部 北京 100083;2. 中国科学院高能物理研究所 北京 100080 |
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| 摘 要： | 采自我国不同聚煤区的不同时代的89件煤样品,用中子活化分析法(INAA)分别测定了29种微量元素。据统计分析结果表明:(1)绝大多数微量元素的平均值高于世界的平均值,含量范围也较美国宽。我国各聚煤区不同时代间相比较,煤中大多数元素的平均含量和富集因数,从华南二叠纪至华北石炭—二叠纪到全国中-新生代逐渐降低。(2)中-新生代的煤中,元素间的相关性较好,华南二叠纪次之,而华北石炭—二叠纪的煤最差。(3)REE分布模式类型以中-新生代的煤最复杂;而华北石炭—二叠纪的煤较简单。
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| 关 键 词： | 煤 微量元素 分布特征 稀土族 |
| 收稿时间： | 1995-08-07 |
DISTRIBUTION OF MINOR ELEMENTS IN CHINESE COALS |
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| Wang Yunquan,Ren Deyi,Lei Jiajin,Tang Yuegang,Yang Shaojin,Yang Yinan.DISTRIBUTION OF MINOR ELEMENTS IN CHINESE COALS[J].Chinese Journal of Geology,1997,32(1):65-73. |
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| Authors: | Wang Yunquan Ren Deyi Lei Jiajin Tang Yuegang Yang Shaojin Yang Yinan |
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| Institution: | 1. Beijing Graduate School, China University of Mining and Technology, Beijing 100083;2. Institute of High Energy Physics, Academia Sinica, Beijing 100080 |
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| Abstract: | Twenty nine elements in eighty nine Chinese coal samples (38 samples were taken from upper Permian of South China, 28 from Permo-Carboniferous of north China and 23 from Mesozoic or Cenozoic) have been investigated using IN AA (instrumental neutron activation analysis). The distribution patterns, and element correlation of different coal-bearing regions are very different: (1) The average of most minor elements in Chinese coals are higher than the world average, While concentration ranges are wider than those of American coals. The characteristics are related to the vast distribution scope and various coals-forming ages, and the complex development history of Chinese coal basins. Compared with one another among the different coal-accumulating areas, the average and enrichment factor (EF) decrease from south China coals, north China coals to Mesozoic or Cenozic coals, reflecting gradually weakening of marine influence. (2) The elements correlation of Mesozoic or Cenozoic coals is the best, South China coals next, and north China coals the worst. However, the cluster analysis among the samples have shown the correlation for north China coals is better than for those south China coals and Mesozoic or Cenozoic coals. (3) The REE distribution patterns of Mesozoic or Cenozoic coals are the most complicated and have five types, South China Coals are less complicated and have four types, while north China coals are the most simple and have only tow types. These results implied that the distribution patterns of minor elements in coals were controlled not only by elemental geochemical properties but also by various geological conditions during and after coal-forming period, such as weathering and sedementary history of coal basin, influence of sea water, magma hydrothermalism and characteristics of source area, etc. |
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