干旱区生态环境知识资源中心(Arid): 古尔班通古特沙漠不同粒级沉积物中稀土元素分布特征及其制约因素

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	古尔班通古特沙漠不同粒级沉积物中稀土元素分布特征及其制约因素
其他题名	Distribution Characteristics and Restriction Factors of Rare Earth Elements in the Size-differentiated Sediments from Gurbantunggut Desert
	刘秀帆; 张峰
来源期刊	稀土
ISSN	1004-0277
出版年	2021
卷号	42 期号:4 页码:1004-0277
中文摘要	古尔班通古特沙漠是周围山脉沉积物的汇。为研究沙漠沉积物稀土元素(REE)的粒度效应及其制约因素,采集了古尔班通古特沙漠不同位置的沉积物3件,测定了粒度并分析了各粒级的稀土元素含量。结果表明,沙漠东部样品粒度最粗,西北部次之,南部最细;样品稀土元素总量(SigmaREE)最大值均出现于<63 mum的粒级,东部样品SigmaREE含量最高(1164.1710~(-6)),西北部样品居中(783.0410~(-6)),南部样品最低(754.92*10~(-6))。稀土元素球粒陨石标准化模式表现出斜L型分布,与塔克拉玛干沙漠、巴丹吉林沙漠、库布齐沙漠和毛乌素沙地基本相同;样品轻重稀土分异明显,轻稀土占据绝对优势;样品Eu负异常明显且主要发生于细颗粒,Ce无明显异常。通过对REE参数的分析认为,各粒级沉积物REE含量的不同主要受控于各粒级样品矿物成分的差异,黏土和细沙中REE含量高的原因是黏土矿物对REE的吸附作用相对较强,而粗颗粒样品REE含量较少则缘于石英和长石的稀释作用。本研究揭示了古尔班通古特沙漠不同粒级沉积物REE含量差异及其影响因素,为REE应用于该沙漠沉积物的示踪研究提供了依据。
英文摘要	Gurbantunggut desert is thesinkof the surrounding mountains.In order to study thegranularity effectand restriction factor of rare earth elements(REE),this work including collecting samples in different location,grain size analysis and REE contents examination among different particle size fraction has been carried out.The results show:the samples in the east were the coarsest,in the northwest the second,and in the south the fine-grain.The maximum total REE contents(SigmaREE) of the three samples all occurred in the fraction of <63 mum,the content of the eastern samples was the highest(1164.17* 10~(-6)),the northwest samples was in the middle (783.04 * 10~(-6)),and the southern samples was the lowest(754.92*10~(-6)).The REE chondrite-normalized distribution patterns of all samples are similar to those of Taklamakan desert,Badain Jaran desert,Kubuqi desert and Maowusu Sandy Land,showing an obliqueLtype distribution with obvious differences in LREE and HREE,and LREE absolutely dominating in the total REE contents.Eu negative anomaly was obvious and mainly appeared in fine particles,while Ce anomaly was not obvious.Based on REE parameters,the REE contents difference among different grain size fractions is mainly controlled by the change of the mineral composition in sized-differentiated sediments,the high REE contents in clay and fine sand sediment result from the adsorption by clay and fine sand sediments,but the REE content in the coarse grain is less which is because of the dilution effect of quartz and feldspar.This study revealed the REE content differences and its influencing factors in sediments of sized-differentiated fractions in Gurbantunggut desert,and provided evidence for the application of REE in the provenance study of the desert.
中文关键词	古尔班通古特沙漠 ; 不同粒级沉积物 ; 稀土元素 ; 矿物
英文关键词	Gurbantunggut desert size-differentiated sediment REE mineral
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Geology
CSCD记录号	CSCD:7029999
来源机构	新疆大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/365351
作者单位	刘秀帆, 新疆大学资源与环境科学学院, 绿洲生态教育部重点实验室, 乌鲁木齐, 新疆 830046, 中国.; 张峰, 新疆大学资源与环境科学学院, 绿洲生态教育部重点实验室, 乌鲁木齐, 新疆 830046, 中国.
推荐引用方式 GB/T 7714	刘秀帆,张峰. 古尔班通古特沙漠不同粒级沉积物中稀土元素分布特征及其制约因素[J]. 新疆大学,2021,42(4):1004-0277.
APA	刘秀帆,&张峰.(2021).古尔班通古特沙漠不同粒级沉积物中稀土元素分布特征及其制约因素.稀土,42(4),1004-0277.
MLA	刘秀帆,et al."古尔班通古特沙漠不同粒级沉积物中稀土元素分布特征及其制约因素".稀土 42.4(2021):1004-0277.