河流稀土元素地球化学研究进展

doi:10.11867/j.issn.1001-8166.2000.05.0553

地球科学进展 ›› 2000, Vol. 15 ›› Issue (5): 553 -540. doi: 10.11867/j.issn.1001-8166.2000.05.0553

河流稀土元素地球化学研究进展

王中良 ^①,刘丛强 ^①,徐志方 ^②,韩贵琳 ^①,朱建明 ^①,张劲 ^③

①中国科学院地球化学研究所环境地球化学国家重点实验室,贵州贵阳 550002；②中国科学院地质与地球物理研究所,北京 100101；③Department of Environmental Biology and Chemistry,Faculty of Science,Toyama University,Gofuku 3190,Toyama 930-8555,Japan

收稿日期:1999-11-08 修回日期:2000-02-29 出版日期:2000-10-01
通讯作者: 王中良(1970-),男,山东省巨野县人,博士研究生,主要从事环境地球化学和地表水体地球化学研究。
基金资助:
国家杰出青年科学家基金项目“流体-岩石反应体系中稀土元素和钇的地球化学”(编号:49625304)和攀登计划项目“地质流体作用及其成矿效应研究”(编号:95-预-39)资助。

ADVANCES IN RESEARCH ON GEOCHEMISTRY OF RARE EARTH ELEMENTS IN RIVERS

WANG Zhong-liang ^①, LIU Cong-qiang ^①, XU Zhi-fang ^②，HAN Gui-lin ^①, ZHU Jian-ming ^①, ZHANG Jin ^③

①State Key Laboratory of Environmental Geochemistry,Institute of Geochemistry,CAS,Guiyang550002,China;②Institute of Geology and Geophysics,CAS,Beijing100101,China;③Department of Environmental Biology and Chemistry,Faculty of Science,Toyama University,Gofuku3190,Toyama930-8555,Japan

Received:1999-11-08 Revised:2000-02-29 Online:2000-10-01 Published:2000-10-01

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河流系统中,稀土元素(REE)受区域地质背景、风化作用、溶液化学以及水与颗粒物相互作用等因素的影响发生分异。河流悬浮物显示轻稀土(LREE)适度富集;河水显示重稀土(HREE)富集,或在HREE富集的基础上又有适度的中稀土(MREE)富集;与其它微量元素相比,REE在河水与颗粒物之间有较小的分配系数(K≈10-6);河流沉积物多显示平坦的REE配分模式。

关键词: 河流, 稀土元素, 风化, 溶液化学, 水粒作用

Rare earth elements (REE) patterns of dissolved phase, suspended materials and sediments in rivers were established based on data referred from recent studies and our work. There are a number of factors or processes such as basin geology, weathering, solution chemistry and water-particle interaction controlled the geochemical behavior of REE in rivers. These factors and processes induced partition and fractionation of REE between suspended particles and solution. The shale-normalized REE patterns of suspended particles in rivers showed moderate light-REE (LREE) enrichment, and the solution of river waters showed significant heavy-REE (HREE) enrichment or convex curves that middle-REE (MREE) slight enrichment piled upon the HREE enrichment. The partition coefficient of REE between the suspended particles and solution (K≈10-6) was smaller comparing with most of other trace metals in rivers. The sediments in rivers showed a flat shale-normalized REE patterns.

Key words: River, Rare earth elements, Weathering, Solution chemistry, Water-particle interaction.

中图分类号:

X142

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