摘要
对末次冰期以来,山东地区平阴黄土剖面的稀土元素（REE）特征研究表明：山东平阴黄土剖面∑REE变化范围为201.28-141.71μg·g-1,平均值为168.84μg·g-1,REE呈现轻稀土元素（LREE）富集,重稀土元素（HREE）平坦,以及中等程度的Eu异常等特征。山东平阴黄土剖面的REE特征与位于渤海海峡的砣矶岛黄土最为接近,其次是我国西北内陆黄土,与黄河岸滩样品的REE特征相差甚多。该剖面不同层位的REE特征并不完全相同,表明平阴地区黄土与黄河岸滩物质来源差别比较大,与砣矶岛黄土物质来源十分相近,而与黄土高原黄土物源比较接近。同时,说明末次冰期以来平阴黄土剖面形成过程中沉积气候环境发生过明显变化,导致剖面沉积物近源和远源组分发生变化。
The rare earth elements variation of Pingyin loess profile in Shandong Province since the last glacial period in rare earth element（ REE） composition was studied,and the results show that ∑REE of samples from Pingyin loess profile varied in the range from 141. 71 to 201. 28 μg·g- 1,with an average of 168. 84 μg·g- 1.And the results show a pattern of enriched LREE,flat HREE and moderate Eu anomaly in the study area. The REE characteristics of Pingyin loess profile in Shandong Province are mostly close to the Tuo Rocky island loess in Temple island archipelago,Bohai Straits,followed by the inland northwest loess in our country,and there are significant differences between the samples from Yellow River beach. What＇s more,there are a few differences in the REE characteristics of the samples from different layers in Pingyin section. It is show that the provenance of Pingyin loess profile is very similar to the Tuo Rocky island loess,and in the process of the profile the paleoclimate and palaeoenvironment had obvious changed.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2015年第9期188-192,共5页
Journal of Arid Land Resources and Environment
基金
国家自然科学基金项目(41172160
41472159)资助
关键词
山东平阴
黄土
稀土元素
物源
Pingyin of Shandong Province
loess
REE
provenance
