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DOI	10.1016/j.palaeo.2014.08.003
	Ostracoda (Crustacea) as indicators of subaqueous mass movements: An example from the large brackish lake Tangra Yumco on the southern Tibetan Plateau, China
	Akita, Lailah Gifty; Frenzel, Peter; Haberzettl, Torsten; Kasper, Thomas; Wang, Junbo; Reicherter, Klaus
通讯作者	Frenzel, P (通讯作者)
发表日期	2015
ISSN	0031-0182
EISSN	1872-616X
起始页码	60
结束页码	74
卷号	419
英文摘要	A conceptual model of subaquaeous mass movements and ostracod distribution in lacustrine sediment event layers was tested. Integrated methods (geophysical, sedimentological and microfossil analyses) were performed on a short sediment core retrieved from 220 m water depth in the large brackish lake TangraYumco on the southern Tibetan Plateau, central Asia. The event layers of the core and their underlying and overlying sediments were investigated. Four major event layers composed of sandy silt with graded bedding are interpreted as turbidites. The fifth layer consisting of fine sand and silt and without graded bedding is characterized as a debrite. The ostracods, small bivalved aquatic crustaceans, identified are Leucocytherella sinensis Huang, 1982, Leucocythere? dorsotuberosa Huang, 1982, Limnocythere inopinata (Baird, 1843) and Fabaeformiscandona gyirongensis (Huang, 1982). Ostracod evidence is a good proxy for the evaluation of massive sediment event layers formed by subaqueous mass movements. Four assumptions of a conceptual model were confirmed: (i) fine grained sediments of event layers (turbidite deposits) contain very low numbers of ostracods compared to the underlying and overlying sediments; (ii) ostracods are sorted according to size and display high abundance and high proportion of adult valves of Leucocytherella sinensis at the base of event layers; (iii) a relatively low number of carapaces is present within the event layers; and (iv) the recolonization of newly event-generated habitats by pioneer assemblages transforming into pre-event association gradually. (C) 2014 Elsevier B.V. All rights reserved.
关键词	SEDIMENT DENSITY FLOWS SIZE DISTRIBUTION QUANTITATIVE-ANALYSIS HABITAT PREFERENCES TURBIDITY CURRENTS LASER DIFFRACTION QILIAN MOUNTAINS IMAGE-ANALYSIS THIN-SECTIONS WATER MASSES
英文关键词	Ostracods; Microfossils; Lacustrine turbidites and debrites; Dang Reyongcuo; Tibetan Autonomous Region; 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:000349577500006
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/258514
推荐引用方式 GB/T 7714	Akita, Lailah Gifty,Frenzel, Peter,Haberzettl, Torsten,et al. Ostracoda (Crustacea) as indicators of subaqueous mass movements: An example from the large brackish lake Tangra Yumco on the southern Tibetan Plateau, China[J]. 中国科学院青藏高原研究所,2015,419.
APA	Akita, Lailah Gifty,Frenzel, Peter,Haberzettl, Torsten,Kasper, Thomas,Wang, Junbo,&Reicherter, Klaus.(2015).Ostracoda (Crustacea) as indicators of subaqueous mass movements: An example from the large brackish lake Tangra Yumco on the southern Tibetan Plateau, China.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,419.
MLA	Akita, Lailah Gifty,et al."Ostracoda (Crustacea) as indicators of subaqueous mass movements: An example from the large brackish lake Tangra Yumco on the southern Tibetan Plateau, China".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 419(2015).