干旱区生态环境知识资源中心(Arid): 青海尕斯库勒盐湖沉积物孢粉组合特征与铀分布关系初探

Arid

	青海尕斯库勒盐湖沉积物孢粉组合特征与铀分布关系初探
其他题名	Priliminary Study of the Relationship between Pollen Assemblages and Uranium Distribution in Gasikule Salt Lake’s Sediments,Qaidam Basin
	叶传永; 王志明; 赵世勤; 郝伟林; 韩军; 林效宾
来源期刊	地质论评
ISSN	0371-5736
出版年	2013
卷号	59 期号:3 页码:479-488
中文摘要	以青海省柴达木盆地西部尕斯库勒盐湖干盐滩ZK06钻孔岩芯为研究对象,结合孢粉、年代学和铀含量数据,探讨了盐湖沉积物中铀分布与古气候变化的关系。研究表明,自280ka以来,尕斯库勒盐湖经历6次成盐期和6次淡化期;植被演化趋势为疏林草原一灌丛草原一荒漠草原;气候由凉略湿逐渐变为冷干。盐湖沉积物中铀含量与孢粉总浓度、灌木浓度、蒿属浓度呈明显正相关;与草本植物浓度呈正相关。孢粉带内沉积物的铀含量比成盐期高得多,平均铀含量为成盐期的3倍。孢粉组合特征可能为研究铀及其他元素在盐湖沉积物中的影响因素提供一些古植物和古气候条件证据。
英文摘要	The drill core of ZK06 in Gasikule Salt Lake,which was located at the southwest of the Qaidam Basin in Qinghai Province,was selected as the research object. Based on the pollen data,geochronology and uranium concentration in sediments,this paper discussed the relationship between uranium distribution and paleoenvironment. The results revealed that Gasikule Salt Lake undergo 6 times of saline deposition and 6 times of detrital deposit from 280ka. Paleo-vegetation changed from veld to desert steppe,and the paleo-climate changed from cool and mid wet to cold and dry. Uranium concentration in sediment was significantly correlated with total sporo-pollen concentration,shrubs and artemisia. The uranium concentration in pollen zone was three times compare to saline deposits. Finally, the arid and cold climate both went against the uranium enrich in sediment, but the temperate and wet climate were adversely. Pollen assemblage characteristics maybe provide paleovegetation and paleo-climate evidences for uranium and others trace elements sediment in salt lake.
中文关键词	青海尕斯库勒盐湖 ; 孢粉 ; 古气候 ; 铀分布
英文关键词	Gasikule Salt Lake pollen paleo-climate uranium distribution
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOLOGY
WOS研究方向	Geology
CSCD记录号	CSCD:4841977
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/229402
作者单位	核工业北京地质研究院, 中核集团铀资源勘查与评价技术重点实验室, 北京 100029, 中国
推荐引用方式 GB/T 7714	叶传永,王志明,赵世勤,等. 青海尕斯库勒盐湖沉积物孢粉组合特征与铀分布关系初探[J],2013,59(3):479-488.
APA	叶传永,王志明,赵世勤,郝伟林,韩军,&林效宾.(2013).青海尕斯库勒盐湖沉积物孢粉组合特征与铀分布关系初探.地质论评,59(3),479-488.
MLA	叶传永,et al."青海尕斯库勒盐湖沉积物孢粉组合特征与铀分布关系初探".地质论评 59.3(2013):479-488.