气候变化领域集成服务门户(CCPortal): 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

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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, Hai-Ping; Feng, Jin-Liang; Chen, Feng
通讯作者	Feng, JL (通讯作者)
发表日期	2017
ISSN	0300-9483
EISSN	1502-3885
起始页码	412
结束页码	427
卷号	46 期号:3
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.
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
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000404144500004
来源期刊	BOREAS
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/258963
推荐引用方式 GB/T 7714	Hu, Hai-Ping,Feng, Jin-Liang,Chen, Feng. 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]. 中国科学院青藏高原研究所,2017,46(3).
APA	Hu, Hai-Ping,Feng, Jin-Liang,&Chen, Feng.(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).
MLA	Hu, Hai-Ping,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).