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学科主题: 地理学::自然地理学
题名: 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
作者: Hu, HP (Hu, Hai-Ping)1, 3; Feng, JL (Feng, Jin-Liang)1; Chen, F (Chen, Feng)1, 2, 3
通讯作者: Feng, JL
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
刊名: BOREAS
发表日期: 2017
DOI: 10.1111/bor.12231
卷: 46, 期:3, 页:412-427
收录类别: SCI
合作性质: 国内
文章类型: Article
类目[WOS]: Geography, Physical; Geosciences, Multidisciplinary ; Physical Geography; Geology
研究领域[WOS]: Physical Geography; Geology
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.
语种: 英语
WOS记录号: WOS:000404144500004
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.itpcas.ac.cn/handle/131C11/8049
Appears in Collections:图书馆_期刊论文

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作者单位: 1.Chinese Acad Sci, Key Lab Tibetan Environm Changes & Land Surface P, Inst Tibetan Plateau Res, Beijing 100101, Peoples R China.
2.Shanxi Univ Finance & Econ, Dept Environm Econ, Taiyuan 030006, Peoples R China.
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China.

Recommended Citation:
Hu, HP ,Feng, JL ,Chen, F . 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.
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