Sediment fluxes and varve formation in Sihailongwan, a maar lake from northeastern China

doi:10.1007/s10933-005-4694-0

	Sediment fluxes and varve formation in Sihailongwan, a maar lake from northeastern China
	Chu, GQ ; Liu, JQ ; Schettler, G ; Li, JY ; Sun, Q ; Gu, ZY ; Lu, HY ; Liu, Q ; Liu, TS
刊名	JOURNAL OF PALEOLIMNOLOGY
	2005-10-01
卷号	34 期号:3 页码:311-324
关键词	Chrysophyte Cysts Diatom Northwestern China Radiometric Dating Sediment Flux Sediment Traps Varve Datings
ISSN号	0921-2728
DOI	10.1007/s10933-005-4694-0
文献子类	Article
英文摘要	Data derived from monthly sediment traps in Sihailongwan, a maar lake in northeastern China, yielded a detailed record of seasonal sediment fluxes. Sediment fluxes correspond to seasonal climatic variations. The diatom flux shows two distinct peaks in September and November, whereas the flux of chrysophyte stomatocysts shows a maximum in May. The blooms of diatoms may be related to the subsequent deepening of the thermocline in September and lake overturn in spring and November, and in flux of nutrient-rich groundwater sometime after the onset of the summer monsoon. The fluxes of organic matter and siliciclastics show a distinct seasonal pattern. They are varying between 0.03 and 0.56 g m(-2) d(-1) and reach a maximum in May. Quartz in the trap samples indicates that the siliciclastic matter may originate from distant aeolian sources. Sediment trap data and thin section investigations confirm the seasonality of Lake Sihailongwan sediments. Dark-colored layer, which mainly consists of valves of Cyclotella comta, might be deposited during autumn, and then is followed by a light-colored mixed layer starting with siliciclastics deposited after ice-out. The varved sediments in the U-shaped Lake Sihailongwan represent a sensitive siliciclastic and geochemical archive of paleoenvironmental variability in this data-sparse area. Detailed investigations of varved sediments should provide decadal to annual records of seasonal sediment flux and its relation to climatic parameters. Especially the diatomaceous layer is regarded to indicate summer climatic fluctuations, while the thick siliciclastic layer could be an indictor of dust events.
WOS关键词	SURFACE SEDIMENTS ; BIOGENIC SILICA ; DIATOMS ; ASSEMBLAGES ; DYNAMICS ; SEA ; RECONSTRUCTION ; VARIABILITY ; CALIFORNIA ; CARBONATE
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Marine & Freshwater Biology
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000231064100002
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/64815]
专题	中国科学院地质与地球物理研究所
通讯作者	Chu, GQ
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Geoforschungszentrum Potsdam, Potsdam, Germany 3.Chinese Acad Geol Sci, Inst Geol, Beijing, Peoples R China 4.Geol Anal Ctr, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Chu, GQ,Liu, JQ,Schettler, G,et al. Sediment fluxes and varve formation in Sihailongwan, a maar lake from northeastern China[J]. JOURNAL OF PALEOLIMNOLOGY,2005,34(3):311-324.
APA	Chu, GQ.,Liu, JQ.,Schettler, G.,Li, JY.,Sun, Q.,...&Liu, TS.(2005).Sediment fluxes and varve formation in Sihailongwan, a maar lake from northeastern China.JOURNAL OF PALEOLIMNOLOGY,34(3),311-324.
MLA	Chu, GQ,et al."Sediment fluxes and varve formation in Sihailongwan, a maar lake from northeastern China".JOURNAL OF PALEOLIMNOLOGY 34.3(2005):311-324.