Carbon isotopes in surface-sediment carbonates of modern Lake Qinghai (Qinghai-Tibet Plateau): Implications for lake evolution in arid areas

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	Carbon isotopes in surface-sediment carbonates of modern Lake Qinghai (Qinghai-Tibet Plateau): Implications for lake evolution in arid areas
	Li, Xiangzhong 1; Liu, Weiguo 1,2; Xu, Liming 3
刊名	CHEMICAL GEOLOGY
	2012-03-18
卷号	300 页码:88-96
关键词	Carbon Isotopes Ostracods Bulk Carbonate Fine-grained Carbonates Dissolved Inorganic Carbon Lake Qinghai
文献子类	Article
英文摘要	To further investigate the significance of carbon isotopes of lake carbonates in arid areas, we examined the carbon isotopic composition of ostracods, bulk carbonate, fine-grained carbonates, and associated water DIC (dissolved inorganic carbon) from Lake Qinghai and several small lakes and ponds surrounding Lake Qinghai. We obtained three major results. 1) The carbon isotopic compositions of ostracods, bulk carbonate, and fine-grained carbonates in the lakes and ponds are clearly correlated with water delta C-13(DIC) values, which vary with water salinity in the Lake Qinghai area. 2) The variation in the delta C-13(DIC) values of lake water is mainly controlled by CO2 exchanges between the atmosphere and lake waters in the Lake Qinghai area. 3) Ostracods, bulk carbonate and fine-grained carbonates show consistent trends of isotopic composition in the study area, and the differences in carbon isotopic composition between authigenic carbonates and ostracods may be explained by the differences in carbon isotopic composition between the DIC of surface water and that of the water near to the sediment-water interface as well as the 'vital offsets' of ostracods.
WOS关键词	DISSOLVED INORGANIC CARBON ; STABLE-ISOTOPE ; OXYGEN-ISOTOPE ; LACUSTRINE CARBONATES ; ENVIRONMENTAL-CHANGE ; CLIMATE RECORD ; FRACTIONATION ; CHINA ; GEOCHEMISTRY ; OSTRACODS
WOS研究方向	Geochemistry & Geophysics
语种	英语
WOS记录号	WOS:000302762400009
内容类型	期刊论文
源URL	[http://ir.isl.ac.cn/handle/363002/5592]
专题	青海盐湖研究所_青海盐湖研究所知识仓储中国科学院青海盐湖研究所
作者单位	1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Peoples R China 2.Xi An Jiao Tong Univ, Sch Human Settlement & Civil Engn, Xian 710049, Peoples R China 3.CAS, Qinghai Inst Salt Lakes, Xining 810008, Peoples R China
推荐引用方式 GB/T 7714	Li, Xiangzhong,Liu, Weiguo,Xu, Liming. Carbon isotopes in surface-sediment carbonates of modern Lake Qinghai (Qinghai-Tibet Plateau): Implications for lake evolution in arid areas[J]. CHEMICAL GEOLOGY,2012,300:88-96.
APA	Li, Xiangzhong,Liu, Weiguo,&Xu, Liming.(2012).Carbon isotopes in surface-sediment carbonates of modern Lake Qinghai (Qinghai-Tibet Plateau): Implications for lake evolution in arid areas.CHEMICAL GEOLOGY,300,88-96.
MLA	Li, Xiangzhong,et al."Carbon isotopes in surface-sediment carbonates of modern Lake Qinghai (Qinghai-Tibet Plateau): Implications for lake evolution in arid areas".CHEMICAL GEOLOGY 300(2012):88-96.