Optical dating of sediments from manas lake in northwestern china: Paleoenvironmental and neotectonic implications

• Autorzy: Tse Y.-Y. , Li S.-H.

Identyfikatory

DOI

10.1515/geochr-2015-0063

• Konferencja: Conference Proceedings of the 4th Asia Pacific Luminescence and Electron Spin Resonance Dating Conference Nov 23rd-25th, 2015, Adelaide, Australia
• Języki publikacji: EN

Abstrakty

EN

Manas Lake is a closed lake basin in northern Xinjiang Province of China, with its current lake bed at 244 m a.s.l. Sediments from the lake area provide valuable information about the paleoenvironmental changes in the Westerlies-dominated arid region. To obtain a chronological constraint on the past changes, optically stimulated luminescence dating was conducted on sediments from the lake beaches. The results show that lacustrine episodes dated at ~80–73 ka ago were recorded in northwestern side of the lake at 270 m a.s.l., while paleoshoreline to near-shore environments during ~80–90 ka ago were recorded in the opposite side of the lake at 262 m a.s.l. The ~80 ka old sedimentary layers are overlain by paleoshoreline sediments formed within the last ~1 ka, separated by a large age gap. From this study and the results from previous studies, it is concluded that breaks in sedimentary records are common in the lake area at elevation > 260 m a.s.l. When comparing sedimentary environments at different times from different sites in this study and previous studies, it is suggested that a small amount of uplift of the northwestern side of Manas Lake relative to the southeastern side may have occurred in the last 80 ka.

Słowa kluczowe

EN

Manas Lake; lacustrine and paleoshoreline sediments; quartz OSL dating; uplift

• Wydawca: De Gruyter
• Czasopismo: Geochronometria
• Rocznik: 2017
• Tom: Vol. 44, no. 1
• Strony: 175--187
• Opis fizyczny: Bibliogr. 29 poz., rys.

Twórcy

autor

Tse Y.-Y.

• Department of Earth Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong, China

autor

Li S.-H.

• Department of Earth Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong, China

Bibliografia

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).