气候变化领域集成服务门户(CCPortal): Trace element variability in single ostracod valves as a proxy for hydrochemical change in Nam Co, central Tibet, during the Holocene

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DOI	10.1016/j.palaeo.2014.01.014
	Trace element variability in single ostracod valves as a proxy for hydrochemical change in Nam Co, central Tibet, during the Holocene
	Yang, Qichao; Jochum, Klaus Peter; Stoll, Brigitte; Weis, Ulrike; Boerner, Nicole; Schwalb, Antje; Frenzel, Peter; Scholz, Denis; Doberschuetz, Stefan; Haberzettl, Torsten; Gleixner, Gerd; Maeusbacher, Roland; Zhu, Liping; Andreae, Meinrat O.
通讯作者	Yang, QC (通讯作者)
发表日期	2014
ISSN	0031-0182
EISSN	1872-616X
起始页码	225
结束页码	235
卷号	399
英文摘要	Ostracod shells, belonging to three taxa (Leucocytherella sinensis Huang, 1982, ?Leucocythere dorsotuberosa Huang, 1982 and ?L dorsotuberosa f. postilirata sensu Pang, 1985), were collected from two sediment cores from Lake Nam Co, on the central Tibetan Plateau. Two variants of LA-ICP-MS (laser ablation-inductively coupled plasma-mass spectrometry), spot and line-scan analyses, were used to investigate trace element concentrations (Mg, Sr, Ba, U and rare earth elements [REEs]) in single ostracod shells. The results suggest that the line-scan method can provide better precision than the spot analysis and is therefore preferred. No significant difference in trace element composition between taxa was detected in our study. Fluctuations of Mg/Ca and Sr/Ca in the shells show good agreement with the reported lake level changes during the Holocene, indicating that ostracod Mg and Sr can be related to palaeohydrochemical processes in this area. A high correlation between Ba/Ca and Sr/Ca was detected in our study, perhaps implying that both metals were controlled by the same mechanisms. A possible relationship between ostracod U/Ca and the past redox conditions on the lake bottom is discussed. Relatively low and constant La/Ca was observed, which could be due to the REE characteristics in the lake water, or ostracod biological processes, or even the associated Fe-Mn and/or organic contaminants. Future studies on more specimens from this area, especially shells from living ostracods, are essential to investigate the potential of ostracod Ba, U and REEs for use as palaeoenvironmental indicators. (C) 2014 Elsevier B.V. All rights reserved.
关键词	RARE-EARTH-ELEMENTS STABLE-ISOTOPE COMPOSITION BASIN WESTERN TIBET HYDROLOGICAL CHANGES PARTITION-COEFFICIENTS ENVIRONMENTAL-CHANGES CLIMATE DEVELOPMENT NORTHERN NIGERIA BARIUM UPTAKE LAKE AREA
英文关键词	Trace element; Nam Co; Tibetan Plateau; Shell chemistry; Palaeohydrochemistry; Holocene
语种	英语
WOS研究方向	Physical Geography ; Geology ; Paleontology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS记录号	WOS:000334978400018
来源期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258384
推荐引用方式 GB/T 7714	Yang, Qichao,Jochum, Klaus Peter,Stoll, Brigitte,et al. Trace element variability in single ostracod valves as a proxy for hydrochemical change in Nam Co, central Tibet, during the Holocene[J]. 中国科学院青藏高原研究所,2014,399.
APA	Yang, Qichao.,Jochum, Klaus Peter.,Stoll, Brigitte.,Weis, Ulrike.,Boerner, Nicole.,...&Andreae, Meinrat O..(2014).Trace element variability in single ostracod valves as a proxy for hydrochemical change in Nam Co, central Tibet, during the Holocene.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,399.
MLA	Yang, Qichao,et al."Trace element variability in single ostracod valves as a proxy for hydrochemical change in Nam Co, central Tibet, during the Holocene".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 399(2014).