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Further quantifying the fluxes and contributions of sources to modern sediment in Lake Qinghai, NE Tibetan Plateau
Wan, Dejun1,2; Jin, Zhangdong2,3; Zhang, Fei2; Chen, Hongyun1; Chen, Liumei2; Song, Lei1; Song, Chao1
2015
发表期刊LIMNOLOGY
ISSN1439-8621
卷号16期号:1页码:11-20
文章类型Article
摘要

Faithfully tracing sources of sediment and then quantifying the flux of each source are the first-order basis for reconstructing paleoclimate and paleoenvironment using lake sediments. The budget of various sources contributing to lake sediment in Lake Qinghai, the largest lake on the Tibetan Plateau, is controversial. In the previous study, the flux of the dust deposition to the modern lake sediment was obtained through 2-year observations, but estimations of other sources have some uncertainties due to inadequate data. In this study our new estimations for the modern Lake Qinghai sediment using new measured data show (1) that contribution (22.1 +/- A 5.2 %) of the fluvial particulate matter is of second significance, only about one-third of the dust deposition, to the modern lake sediment, when its quick deposition near river mouths is not considered, (2) that lacustrine organisms contribute only 5.2 +/- A 1.1 % of the sediment, but account for similar to 70 % of the organic matter in sediment, and (3) that authigenic carbonates contribute 21.0 +/- A 8.6 % of the sediment and 63.6 % of the total carbonates in the lake sediment, respectively, which is due to a direct precipitation of both Ca2+ and Mg2+ in the modern Ca2+-limited lake. These quantifications are instructive to understand the particulate fluxes to sediment pools in Lake Qinghai under the present conditions and to reconstruct paleoclimate and paleoenvironment via physical and geochemical proxies using past sediments.

关键词Suspended Particulate Matter Lacustrine Organisms Authigenic Carbonates Lake Qinghai Sediment
WOS标题词Science & Technology ; Life Sciences & Biomedicine
DOI10.1007/s10201-014-0434-3
关键词[WOS]China ; Basin ; Balance ; Dust
收录类别SCI
语种英语
WOS研究方向Marine & Freshwater Biology
WOS类目Limnology
WOS记录号WOS:000348982900002
出版者SPRINGER JAPAN KK
引用统计
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/9418
专题加速器质谱中心
通讯作者Jin, Zhangdong
作者单位1.Chinese Acad Geol Sci, Inst Hydrogeol & Environm Geol, Shijiazhuang 050061, Peoples R China
2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Peoples R China
3.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 710049, Peoples R China
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Wan, Dejun,Jin, Zhangdong,Zhang, Fei,et al. Further quantifying the fluxes and contributions of sources to modern sediment in Lake Qinghai, NE Tibetan Plateau[J]. LIMNOLOGY,2015,16(1):11-20.
APA Wan, Dejun.,Jin, Zhangdong.,Zhang, Fei.,Chen, Hongyun.,Chen, Liumei.,...&Song, Chao.(2015).Further quantifying the fluxes and contributions of sources to modern sediment in Lake Qinghai, NE Tibetan Plateau.LIMNOLOGY,16(1),11-20.
MLA Wan, Dejun,et al."Further quantifying the fluxes and contributions of sources to modern sediment in Lake Qinghai, NE Tibetan Plateau".LIMNOLOGY 16.1(2015):11-20.
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