干旱区生态环境知识资源中心(Arid): 青海湖沉积物中微量元素纵向分布反映的古环境意义

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	青海湖沉积物中微量元素纵向分布反映的古环境意义
其他题名	Paleoenvironmental records from the vertical distribution of trace elements in the sediments of Qinghai Lake
	郭雪莲 1; 王金鹏 2; 史基安 2; 王琪 2
来源期刊	兰州大学学报. 自然科学版
ISSN	0455-2059
出版年	2005
卷号	41 期号:1 页码:19-24
中文摘要	通过对青海湖QH1岩心沉积物中微量元素Li,V,Cs,Co,REE(La,Ce,Pr,Nd,Sm,Eu,Gd,Tb,Dy,Er,Yb)及wCs/wRb的高分辨率分析,结果表明:微量元素在沉积物中的质量分数变化与沉积环境密切相关,在温暖湿润的气候环境下,沉积物中wREE,wLi,wV,wCs,wC.较高、wCs/wRb较大;而在冷干的气候环境条件下,元素质量分数相对较低.REE(稀土总量)与wCs/wRb之间呈良好的正相关性,REE可以作为反映青海湖环境的一个有效指标.近8500年来湖区气候环境变化特征表现为冷干与暖湿的交替,气候的突变在沉积物上表现为元素质量分数的突变.
英文摘要	Based on high-resolution analyses of trace elements of Li, V, Cs, Co, REE(La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Er, Yb) concentrations and ivcs/wKb in sediments of Qinghai Lake, it can be concluded that the sediments from Qinghai Lake have very similar REE distribution patterns, which are moderately rich in light rare earth element(LREE). Indicating that the sediments at different depths have the same (or the similar) source supply and formation process. Trace elements content of lake core are changed with environmental change. There is a well positive correlation between ]T)REE contents and lUcs/’WRb which has obviously environmental significance for indicating climatic and environmental changes. J^REE, Li, V, Cs, Co concentrations and wcs/wr^, are all relatively high, This indicates the warm and humid climate, while the lower contents of chemical elements are corresponded with the cold and arid climate condition. The characteristic of climatic and environmental change was the replacement between cold-arid and warm-humid in recent 8500 years, the sudden change of elemental contents was in accordance with the transformation of climate. Therefore, J]REE in sediments of Qinghai Lake is an effective indicator to reflect the paleocliraatic and paleoenvironmental variation in the high-cold semi-arid areas.
中文关键词	微量元素 ; 古环境 ; 青海湖
英文关键词	trace element paleoenvironment Qinghai Lake
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:1992691
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/206414
作者单位	1.兰州大学,资源环境学院, 兰州, 甘肃 730000, 中国; 2.中国科学院,兰州地质研究所, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	郭雪莲,王金鹏,史基安,等. 青海湖沉积物中微量元素纵向分布反映的古环境意义[J]. 兰州大学,2005,41(1):19-24.
APA	郭雪莲,王金鹏,史基安,&王琪.(2005).青海湖沉积物中微量元素纵向分布反映的古环境意义.兰州大学学报. 自然科学版,41(1),19-24.
MLA	郭雪莲,et al."青海湖沉积物中微量元素纵向分布反映的古环境意义".兰州大学学报. 自然科学版 41.1(2005):19-24.