| 表生作用下稀土元素地球化学特征——以海南岛北部玄武岩分布区为例 |
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| 引用本文： | 黄成敏,龚子同.表生作用下稀土元素地球化学特征——以海南岛北部玄武岩分布区为例[J].山地学报,2002,20(1):70-74. |
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| 作者姓名： | 黄成敏 龚子同 |
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| 作者单位： | 1. 成都理工大学沉积地质研究所,四川成都,610059;四川大学环境学院,四川成都,610065
2. 中国科学院南京土壤研究所,江苏南京,210008 |
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| 基金项目： | 国家自然科学基金重点项目 ( 4 98310 0 4) |
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| 摘 要： | 对海南岛北部玄武岩区岩石-土壤-植物-地下水系统中稀土元素迁移和分布模式的研究表明，随土壤的发育，REE出现分异，LREE逐渐富集；Ce由玄武岩中的负异常向土壤中正异常演化。地下水中REE的含量和分布模式主要受岩石风化和成土作用影响。植物虽对REE具有选择吸收作用，但REE的生物地球化学循环不活跃。
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| 关 键 词： | 稀土元素 玄武岩 土壤 植物 地下水 表生作用 地球化学特征 |
| 文章编号： | 1008-2786(2002)01-0070-05 |
| 修稿时间： | 2000年7月23日 |
REE Geochemistry of Hypergenesis in Basalt |
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| HUANG Cheng-min , and GONG Zi-tong.REE Geochemistry of Hypergenesis in Basalt[J].Journal of Mountain Research,2002,20(1):70-74. |
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| Authors: | HUANG Cheng-min and GONG Zi-tong |
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| Institution: | HUANG Cheng-min 1,2 and GONG Zi-tong 3 |
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| Abstract: | The partition of rare earth elements(REE)is great significant to study on geochemistry.The migration characteristics and distribution patterns of REE in rock-soil-plant-groundwater system in the basalt-distributing region of Northern Hainan Island have been dealt with to research on geochemical behavior of REE in process of hypergenesis.The results show that the fraction of REE in soils mainly depends on REE leaching in soil formation process and disparity of chemical properties among REE.With soil development, REE partition, and light rare earth elements (LREE) accumulate while heavy rare earth elements (HREE) lose gradually.Meanwhile the trends of positive Ce-anomaly and negative Eu-anomaly are remarkable with soil development.REE contents and distribution patterns in groundwater are influenced by rock weathering and soil formation, more HREE than LREE inflow into groundwater so that difference in quantity between LREE and HREE in groundwater is not so great as that in soils.Though plant absorbed REE selectively,biogeochemical cycle of REE is not active. |
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| Keywords: | REE basalt soil plant groundwater |
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