论文部分内容阅读
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。
A total of 89 coal samples collected from different ages in different coals in our country were determined by neutron activation analysis (INAA). According to statistical analysis results show that: (1) The average value of the vast majority of trace elements than the world average, the content range is wider than the United States. The average contents and enrichment factors of most elements in coal in different coal accumulations in China are gradually decreasing from Permian in South China to Carboniferous-Permian in North China to Mesozoic-Cenozoic in China. (2) In the Mesozoic-Cenozoic coal, correlation between elements is better, followed by Permian in South China, and coal in Carboniferous-Permian in North China is the worst. (3) The type of REE distribution model is the most complex in the Meso-Cenozoic coal; while the Carboniferous-Permian coal in North China is relatively simple.