Temperature-induced fractionation of oxygen isotopes of diatom frustules and growth water in Lake Sihailongwan in Northeast China

doi:10.1007/s11434-010-4121-4

	Temperature-induced fractionation of oxygen isotopes of diatom frustules and growth water in Lake Sihailongwan in Northeast China
	Li Dong; Han JingTai
刊名	CHINESE SCIENCE BULLETIN
	2010-11-01
卷号	55 期号:33 页码:3794-3801
关键词	diatom silica oxygen isotope isotopic fractionation Lake Sihailongwan Northeast China
ISSN号	1001-6538
DOI	10.1007/s11434-010-4121-4
文献子类	Article
英文摘要	Diatom oxygen isotopes have been widely applied in quantitative reconstruction of the paleoclimate and paleoenvironment, but have rarely been reported in China. In the present study, Lake Sihailongwan in Northeast China was selected for detailed investigation of oxygen isotopic fractionation between diatom frustules and lake water induced by growth temperature. This study involved a 2-year period of field monitoring of the lake water temperature at multiple depths and biweekly collections of traps for both sediment and water at shallow and bottom depths (7 and 49 m below the lake surface, respectively), diatom separation and purification of the trap sediments, and oxygen isotope measurement for diatom silica and lake water samples. The conditioned experiment conducted herein demonstrated that the laboratory device, methods and techniques used in this study were capable of generating reliable data for the typical oxygen isotope composition of diatom frustules. The data obtained revealed a prominent linear relationship between the oxygen isotope composition of the modern diatom and lake temperature during growth. The fractionation coefficient was about -0.185aEuro degrees/A degrees C-0.238aEuro degrees/A degrees C in the temperature range of 3.6-24A degrees C, which is consistent with the observations from various aquatic environments and laboratory culture with different diatom taxa. These findings provide strong support for the dominant control of the growth temperature on the oxygen isotope fractionation between the diatom frustules and ambient water. A notable difference in the fractionation coefficient was observed between the surface and bottom diatom oxygen isotopes, suggesting that various depositional processes and taphonomic effects influenced the surface and bottom trap samples. Another factor leading to this difference may be that enrichment by evaporation and dilution by rainfall have a stronger influence on the surface. Overall, the results presented here demonstrate significant progress in evaluation of diatom oxygen isotopes in China and draw attention to the differences between surface and bottom diatom oxygen isotope compositions.
WOS关键词	GANG VOLCANIC FIELD ; VARVED SEDIMENTS ; BIOGENIC SILICA ; JILIN PROVINCE ; MARINE DIATOMS ; PALAEOVARIATIONS ; RECORD ; CARBON ; OPAL ; FLUX
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000285101400009
资助机构	National Natural Science Foundation of China(40672114 ; National Natural Science Foundation of China(40672114 ; National Basic Research Program of China(2010CB950200) ; National Basic Research Program of China(2010CB950200) ; 40872112) ; 40872112) ; National Natural Science Foundation of China(40672114 ; National Natural Science Foundation of China(40672114 ; National Basic Research Program of China(2010CB950200) ; National Basic Research Program of China(2010CB950200) ; 40872112) ; 40872112) ; National Natural Science Foundation of China(40672114 ; National Natural Science Foundation of China(40672114 ; National Basic Research Program of China(2010CB950200) ; National Basic Research Program of China(2010CB950200) ; 40872112) ; 40872112) ; National Natural Science Foundation of China(40672114 ; National Natural Science Foundation of China(40672114 ; National Basic Research Program of China(2010CB950200) ; National Basic Research Program of China(2010CB950200) ; 40872112) ; 40872112)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/72362]
专题	中国科学院地质与地球物理研究所
通讯作者	Han JingTai
作者单位	Chinese Acad Sci, Key Lab Cenozo Geol & Environm, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Li Dong,Han JingTai. Temperature-induced fractionation of oxygen isotopes of diatom frustules and growth water in Lake Sihailongwan in Northeast China[J]. CHINESE SCIENCE BULLETIN,2010,55(33):3794-3801.
APA	Li Dong,&Han JingTai.(2010).Temperature-induced fractionation of oxygen isotopes of diatom frustules and growth water in Lake Sihailongwan in Northeast China.CHINESE SCIENCE BULLETIN,55(33),3794-3801.
MLA	Li Dong,et al."Temperature-induced fractionation of oxygen isotopes of diatom frustules and growth water in Lake Sihailongwan in Northeast China".CHINESE SCIENCE BULLETIN 55.33(2010):3794-3801.