摘要
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≈ 1 0 -6) ;河流沉积物多显示平坦的 REE配分模式。
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.
出处
《地球科学进展》
CAS
CSCD
2000年第5期553-558,共6页
Advances in Earth Science
基金
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 :4962 5 3 0 4)
攀登计划项目!"地质流体作用及
关键词
河流
稀土元素
风化
溶液化学
地球化学
River
Rare earth elements
Weathering
Solution chemistry
Water particle interaction
