| 华北若干晚古生代煤中稀土元素的赋存特征 |
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| 关键词:coal rare earth element distribution pattern Late Paleozoic |
| 基金项目:国家自然科学基金项目(编号:40202014和40072054) |
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| 摘要: |
| Modes of Occurrence of Rare Earth Elements in Some Late Paleozoic Coals of North China |
| The study of the rare earth elements (REE) in some Late Paleozoic coals from several coal mines of North China shows that the REE distribution in the coal-bearing strata (coal seams, roofs, footwalls, and partings)is complicated because it is controlled not only by the macro-geological settings but also by the micro-environment during the coal formation. The obvious depletion of δEu seems to be the common character of REE in coal-bearing strata, and their different concentrations constitute the main difference. The REE are mainly supplied by the terrigenous materials, and the concentrations of REE in Shanxi Formation are higher than those in Taiyuan Formation. To a large extent, the REE in coals of Shanxi Formation inherit the modes of occurrence from the parent rocks. The distribution of REE in coals of Taiyuan Formation is not like that in seawater, because the quantitative and distributive influences of the seawater on the REE in coals are not very obvious. The magmatic contact metamorphism might lead to the changes of REE distribution in coals. |
| DAI Shi-feng,REN De-yi,LI Sheng-sheng.2003.Modes of Occurrence of Rare Earth Elements in Some Late Paleozoic Coals of North China[J].Acta Geoscientica Sinica,24(3):273-278. |
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