Enrichment and Release of Rare Earth Elements during Weathering of Sedimentary Rocks in Wujiang Catchments,Southwest China

被引：3

作者：

宋照亮 ^{[1
]}

刘丛强 ^{[2
]}

韩贵琳 ^{[2
]}

王中良 ^{[2
]}

朱兆洲 ^{[3
]}

杨成 ^{[3
]}

机构：

[1] State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guizhou 550002, China,School of Environmental Science and Technology, Zhejiang College of Forestry, Linan 311300, China,Graduate School, Chinese Aca

[2] State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guizhou 550002, China

[3] State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guizhou 550002, China,Graduate School, Chinese Academy of Sciences, Beijing 100080, China

来源：

JournalofRareEarths | 2006年 / 04期

关键词：

rare earth elements; enrichment; release; weathering; sedimentary rocks;

D O I：

暂无

中图分类号：

O614.33 [镧系元素（稀土元素）];

学科分类号：

070301 ; 081704 ;

摘要：

Thirteen weathering profiles of sedimentary rocks such as limestone, dolomitic limestone, dolomite, sillicalite, black shale and purple sandrock from Wujiang catchments were selected for study on enrichment and release behavior of rare earth elements (REE) during weathering, and its impact on plant growth and riverine REE distribution in the catchments with methods of hierachical cluster analysis and mass balance calculation in order to set a basis for riverine material source research and agricultural production. The results show that the enrichment degree of REE in calcareous soils from the Wujiang catchments is much higher than that of limestone, yellow soil, upper continental crust (UCC), China soil (CS) and world soil (WS). The ability of enrichment and release of REE is partly controlled by distribution of REE in bedrocks, contents and adsorption ability of organic matters, clay minerals and Fe-oxides/hydroxides in weathering profiles. The REE released from weathering of carbonate rocks and clastic rocks can be absorbed and utilized by local plants. The results also reveal that release of REE and Fe mainly from weathering of carbonate rocks and partly from clastic rocks exerts an important control on riverine REE distribution.

引用

页码：491 / 496

页数：6