| 引用本文： |
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陈儒庆,龙斌,曹长春.广西煤的稀土元素分布模式[J].广西科学,1996,3(2):32-36. [点击复制]
- Chen Ruqing,Long Bin,Cao Changchun.Rare-earth Element Distribution Patterns of Coals in Guangxi[J].Guangxi Sciences,1996,3(2):32-36. [点击复制]
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| 摘要: |
| 广西不同产地、不同时代、不同煤种的煤灰稀土元素分析结果表明,未变质煤的球粒陨石标准化图呈右倾斜"V"型曲线,北美页岩标准化图呈近水平直线,煤中稀土元素没有发生分离和迁移。区域变质煤的球粒陨石标准化图呈右倾斜的"V"型曲线,煤中稀土元素受后期热水溶液影响发生轻微迁移,向富重稀土方向演化。热液变质煤中稀土元素发生了强烈的分离和迁移;煤变质程度越高,时代越早,煤中稀土元素的分离和迁移就越强烈。 |
| 关键词: 稀土元素 地球化学 煤 |
| DOI： |
| 投稿时间：1995-12-11 |
| 基金项目:国家自然科学基金资助项目(项目编号49070168),广西区科委科技攻关项目。 |
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| Rare-earth Element Distribution Patterns of Coals in Guangxi |
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Chen Ruqing, Long Bin, Cao Changchun
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| (Guilin Institute of Technology, 12 Jiangan Road, Guilin, Guangxi, 541004) |
| Abstract: |
| Ashes of the coals with different ages and coal ranks from different localities of Guangxi were analysed for their rare-earth elements. The chondrite-normalized diagram of unmetamorphosed coal shows a v-shaped curve inclining towards the right. The north American shale normalized diagram shows nearly a level straight line. No fraction and migration occurred for the rareearth elements in the coal. The chondrite-normalized diagram of regional metamorphosed coal also shows a v-shaped curve inclining towards the right. The rare-earth elements in the coal migrated,to a certain extent, towards enriching heavy rare-earth elements because of being affected by hot water solution in late stage. The rare-earth elements of hydrothermal-metamorphosed coal fractionized and migrated strongly. and their fraction and migration were positively proportional to the metamorphic degree and ages of the coal. |
| Key words: rare-earth elements geochemistry coal |
