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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
Source PublicationLIMNOLOGY
ISSN1439-8621
Volume16Issue:1Pages:11-20
SubtypeArticle
Abstract

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.

KeywordSuspended Particulate Matter Lacustrine Organisms Authigenic Carbonates Lake Qinghai Sediment
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
DOI10.1007/s10201-014-0434-3
WOS KeywordChina ; Basin ; Balance ; Dust
Indexed BySCI
Language英语
WOS Research AreaMarine & Freshwater Biology
WOS SubjectLimnology
WOS IDWOS:000348982900002
PublisherSPRINGER JAPAN KK
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/9418
Collection加速器质谱中心
Corresponding AuthorJin, Zhangdong
Affiliation1.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
Recommended Citation
GB/T 7714
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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