新疆且末县绿洲土壤中4种稀土元素含量特征及其成因探讨  

Content characteristics and genesis of four rare earth elements in oasis soil of Qiemo county,Xinjiang

作　　者：张峰玮 周金龙[1,2] 曾妍妍[1,2] 陈云飞 顾思博[1,2] ZHANG Fengwei;ZHOU Jinlong;ZENG Yanyan;CHEN Yunfei;GU Sibo(College of Water Conservancy and Civil Engineering,Xinjiang Agricultural University,Urumqi 830052;Xinjiang Hydrology and Water Resources Engineering Research Center,Urumqi 830052;Xinjiang Institute of Engineering,Urumqi 830023,China)

机构地区：[1]新疆农业大学水利与土木工程学院,乌鲁木齐830052 [2]新疆水文水资源工程技术研究中心,乌鲁木齐830052 [3]新疆工程学院,乌鲁木齐830023

出　　处：《干旱区资源与环境》2021年第9期135-142,共8页Journal of Arid Land Resources and Environment

基　　金：中央返还两权款资金项目(S15-1-LQ)资助。

摘　　要：以新疆且末县绿洲区为研究区,对656组表层土壤、178组深层土壤钪(Sc)、钇(Y)、镧(La)、铈(Ce)4种稀土元素(REE)与土壤组分含量的测定结果进行统计。结果表明:且末县绿洲表层与深层土壤的4种稀土元素含量均低于中国土壤平均值,且基本属于均匀分布;4种稀土元素在本区广泛分布的洪积物与冲积物中的含量较高;4种稀土元素的表层土壤含量与深层土壤含量相近,人为活动对其影响较小。4种稀土元素与土壤常规指标的相关分析结果显示,研究区浅层与深层土壤中的4种稀土元素含量与土壤中SiO_(2)含量呈显著负相关;Sc、La、Ce元素含量与pH值呈显著负相关,与Al_(2)O_(3)、TFe_(2)O_(3)含量呈极显著正相关。根据分析结果推测研究区4种稀土元素的地球化学含量特征成因是干燥气候条件下由多个物源区物质经历多次物理分选及混合作用生成。Taking the oasis area of Qiemo county,Xinjiang as the study area,the test results of scandium(Sc),yttrium(Y),lanthanum(La)and cerium(Ce)in 656 groups of surface soil and 178 groups of deep soil were statistically analyzed.The results show that the content of four REEs in the surface and deep soil of Qiemo county is lower than the average values of Chinese soils,and it is basically evenly distributed.The contents of the four REEs in the diluvial and alluvial deposit widely distributed in this area are relatively high.The contents of the four REEs in surface soil are similar to that of the deep soil,and the human activities have little influence on them.The results of correlation analysis between four REEs and conventional soil physicochemical indexes showed that the contents of REEs in shallow and deep soil are significantly negatively correlated with SiO_(2)content in soil;the contents of SC,La and Ce are significantly negatively correlated with pH value,and positively correlated with the contents of Al_(2)O_(3)and Fe2O3.According to the analysis results,it is inferred that the geochemical content characteristics of the four REEs in the study area are generated by multiple physical separation and mixing of materials from multiple provenance areas in dry climate.

关 键 词：土壤 稀土元素 含量特征 成因探讨 新疆且末县 

分 类 号：S153.61[农业科学—土壤学]