O-18 and C-13 in fossil shells of Radix sp from the sediment succession of a dammed palaeo-lake in the Yarlung Tsangpo valley, Tibet, China

doi:10.1111/bor.12231

	O-18 and C-13 in fossil shells of Radix sp from the sediment succession of a dammed palaeo-lake in the Yarlung Tsangpo valley, Tibet, China
	Hu, HP (Hu, Hai-Ping)2,3; Feng, JL (Feng, Jin-Liang)2; Chen, F (Chen, Feng)1,2,3; Feng, JL
刊名	BOREAS
	2017
卷号	46 期号:3 页码:412-427
关键词	Eastern Pamirs Tajikistan Aquatic Gastropod Radix Age Calibration Curves Carbon-isotope Ratios Organic-matter Southeastern Tibet Late Pleistocene Stable Isotopes Mollusk Shells River Incision
DOI	10.1111/bor.12231
文献子类	Article
英文摘要	A series of confirmed and suspected dammed palaeo-lake sedimentary successions is scattered within the middle Yarlung Tsangpo valley in Tibet. However, the chronology, the genesis of the dam and its location, the water level of the dammed lake, the process of dam failure and the spatiotemporal relationships between the sedimentary successions remain controversial. Here, we focus on one sedimentary succession of the suspected dammed palaeo-lake at Xigaze. We measured the grain-size distribution, magnetic susceptibility, organic and inorganic carbon content, and C-13(org) and N-15(total) ratios of the sediments. In addition, we measured the O-18(shell) and C-13(shell) values of modern and fossil Radix sp. shells, and the O-18(water) and C-13(DIC) values of the ambient water with different hydrological regimes. The results indicate that the O-18(shell) values of modern Radix sp. and the O-18(water) of the ambient water body significantly depend on its hydrological status. In addition, a strong positive relationship was observed between O-18(shell) values of modern Radix sp. shells and the O-18(water) of the ambient water on the Tibetan Plateau. According to this correlation, the O-18(water) values of the palaeo-water body are reconstructed using the O-18(shell) values of Radix sp. fossil shells in the Xigaze section. Further, based on the O-18(shell) values of fossil Radix sp., the reconstructed O-18(water) of the palaeo-water body and the specific habitats of Radix sp., we infer that the sedimentary succession in the Xigaze broad valley was mainly formed within the backwater terminal zone of a dammed palaeo-lake and that the elevation of the water level of the lake was approximately 3811m a.s.l. AMS C-14 dating indicates that the deposits of the dammed palaeo-lake were formed at about 33-22cal. ka BP. Finally, the presence of Radix sp. fossil shells within the Xigaze section suggests that Radix sp. survived the late Last Glacial Period on the Tibetan Plateau.
学科主题	自然地理学
WOS研究方向	Physical Geography; Geology
语种	英语
WOS记录号	WOS:000404144500004
内容类型	期刊论文
源URL	[http://ir.itpcas.ac.cn/handle/131C11/8049]
专题	青藏高原研究所_图书馆
通讯作者	Feng, JL
作者单位	1.Shanxi Univ Finance & Econ, Dept Environm Econ, Taiyuan 030006, Peoples R China. 2.Chinese Acad Sci, Key Lab Tibetan Environm Changes & Land Surface P, Inst Tibetan Plateau Res, Beijing 100101, Peoples R China. 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China.
推荐引用方式 GB/T 7714	Hu, HP ,Feng, JL ,Chen, F ,et al. O-18 and C-13 in fossil shells of Radix sp from the sediment succession of a dammed palaeo-lake in the Yarlung Tsangpo valley, Tibet, China[J]. BOREAS,2017,46(3):412-427.
APA	Hu, HP ,Feng, JL ,Chen, F ,&Feng, JL.(2017).O-18 and C-13 in fossil shells of Radix sp from the sediment succession of a dammed palaeo-lake in the Yarlung Tsangpo valley, Tibet, China.BOREAS,46(3),412-427.
MLA	Hu, HP ,et al."O-18 and C-13 in fossil shells of Radix sp from the sediment succession of a dammed palaeo-lake in the Yarlung Tsangpo valley, Tibet, China".BOREAS 46.3(2017):412-427.