ISWC OpenIR  > 水保所知识产出(1956---)
3万年来卤阳湖沉积物地球化学元素变化特征及其环境意义
颜永毫1,2; 周杰1,3; 何忠1; 周新郢4; 赵克良4
2016
Source Publication水土保持学报
Volume30Issue:3Pages:208-219
Abstract

利用荧光光谱仪、等离子发射光谱,测定关中盆地卤阳湖区沉积物(0~280cm)元素含量变化,在光
释光定年与R型聚类分析基础上,探讨3万年来该区26种元素的地球化学行为特征及环境意义。结果表
明:卤阳湖沉积物元素大致可分4类:第1类Si、Zr、Hf、Na,指示4.6ka B.P.后湖泊萎缩,外源沉积减少;
第2类Ga、U、Sr,指示4.6ka B.P.和2.0ka B.P.前后的湖区干旱气候;第3类Cu、Hg、Mn、Mg,指示4.6
ka B.P.后湖水咸度的增加;第4类Ti、Sb、Pb、V、Th、Co、Fe、Bi、Cs、Zn、Ni、Rb、Ga、K、Al,这15种元素指示
湖水咸度与周边人为活动的增加。元素变化特征说明,卤阳湖在33~10.4ka B.P.之间,沉积环境稳定,全新
世前期(10.4~4.6ka B.P.)湖水变淡,4.6ka B.P.后,外源沉积减少,湖水咸度升高,在2.0ka B.P.前后,湖
泊干旱造成大量盐分生成,之后,虽气候转湿,但人为活动增加使湖泊快速走向衰亡。

Other Abstract

The characteristics of 26geochemical elements and their environmental implications in Luyang Lake
sediments(0~280cm)for the last 30,000years in Guanzhong basin were discussed based on the element
contents determinated by fluorescence spectrometer and plasma emission spectrometry,the OSL dating results
and the R—type cluster analysis.Results showed the geochemical elements in Luyang Lake sediments
could be divided into four categories:The first include Si,Zr,Hf,Na,indicating the decreased exogenetic
clastics and the lake shrink after 4.6ka B.P.,the second included Ga,U,Sr,indicating the arid climate at
4.6ka B.P.and 2.0ka B.P.,the third included Cu,Hg,Mn,Mg,indicating the increasing lake salty
since 4.6ka B.P.,the fourth contained 15elements,Ti,Sb,Pb,V,Th,Co,Fe,Bi,Cs,Zn,Ni,Rb,
Ga,K,Al,indicating the increasing lake salinity and the human activities around the lake.Different behaviors
of geochemical elements in Luyang Lake indicated the sedimentary environment in Luyang Lake was stable
between 33ka B.P.and 10.4ka B.P.,then the lake salinity decreased in the early Holocene(10.4~4.
6ka B.P.)while increased after 4.6ka B.P.accompanying with the reduced exogenetic clastics.The drying
process at 2.0ka B.P.caused a lot of salt formation,then the climate turned relatively wet,however,
the increasing human activities accelerated the lake disappearance.

Keyword湖泊沉积物 气候变化 地球化学元素 卤阳湖
Indexed By中文核心期刊要目总览
Language中文
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8713
Collection水保所知识产出(1956---)
Affiliation1.中国科学院水利部水土保持研究所/西北农林科技大学水土保持研究所
2.中国科学院大学
3.中国科学院昆明分院
4.中国科学院古脊椎与古人类研究所
First Author Affilication中国科学院水利部水土保持研究所
Recommended Citation
GB/T 7714
颜永毫,周杰,何忠,等. 3万年来卤阳湖沉积物地球化学元素变化特征及其环境意义[J]. 水土保持学报,2016,30(3):208-219.
APA 颜永毫,周杰,何忠,周新郢,&赵克良.(2016).3万年来卤阳湖沉积物地球化学元素变化特征及其环境意义.水土保持学报,30(3),208-219.
MLA 颜永毫,et al."3万年来卤阳湖沉积物地球化学元素变化特征及其环境意义".水土保持学报 30.3(2016):208-219.
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