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A New 14C Data Set of the PY608W-PC Sediment Core from Lake Pumoyum Co (Southeastern Tibetan Plateau) Over the Last 19 kyr

Published online by Cambridge University Press:  18 July 2016

Takahiro Watanabe ,
Tetsuya Matsunaka ,
Toshio Nakamura ,
Mitsugu Nishimura ,
Yasuhiro Izutsu ,
Motoyasu Minami ,
Fumiko Watanabe Nara ,
Takeshi Kakegawa  and
Liping Zhu
Takahiro Watanabe*
Affiliation:
Graduate School of Science, Tohoku University, 6-3 Aramaki Aza Aoba, Aoba-ku, Sendai 980-8578, Japan
Tetsuya Matsunaka
Affiliation:
School of Marine Science and Technology, Tokai University, 3-20-1 Orido, Shimizu, Shizuoka 424–8610, Japan
Toshio Nakamura
Affiliation:
Center for Chronological Research, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8602, Japan
Mitsugu Nishimura
Affiliation:
School of Marine Science and Technology, Tokai University, 3-20-1 Orido, Shimizu, Shizuoka 424–8610, Japan
Yasuhiro Izutsu
Affiliation:
School of Marine Science and Technology, Tokai University, 3-20-1 Orido, Shimizu, Shizuoka 424–8610, Japan
Motoyasu Minami
Affiliation:
Department of Environmental Biology, Chubu University, 1200 Matsumoto-Cho, Kasugai 487-8501, Japan
Fumiko Watanabe Nara
Affiliation:
Graduate School of Science, Tohoku University, 6-3 Aramaki Aza Aoba, Aoba-ku, Sendai 980-8578, Japan
Takeshi Kakegawa
Affiliation:
Graduate School of Science, Tohoku University, 6-3 Aramaki Aza Aoba, Aoba-ku, Sendai 980-8578, Japan
Liping Zhu
Affiliation:
Institute of Tibetan Plateau, Chinese Academy of Science, No. 18 Shuangqing Road, Haidian District, Beijing 100085, China
*
Corresponding author. Email: t-watanabe@m.tains.tohoku.ac.jp.
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Abstract

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A new continuous sediment core (PY608W-PC; 3.8 m length) for reconstruction of climatic and environmental changes in the southeastern Tibetan Plateau was taken from the eastern part of Lake Pumoyum Co in August 2006. Sediment layers of the lower part of PY608W-PC (380–300 cm depth) were composed mainly of relatively large plant residues (up to ∼3 cm in length) with an admixture of fine sand and sandy silt. The large plant residues disappeared at ∼300–290 cm depth in core PY608W-PC and were replaced by silt-silty clay. The large plant residues from the lower part of PY608W-PC could be aquatic, because the plant residues were extremely enriched in 13C (up to –3.0‰, −5.6 ± 2.3‰ on average). On the other hand, the plant residue concentrates (PRC fractions) from the upper part of the core (290–0 cm in depth) could be terrestrial C3 plants (δ13C = –21.8 ± 1.7‰ on average). Radiocarbon dating was performed on the large plant residues and PRC fractions from the PY608W-PC sediment core, which represented the chronology from ∼19,000 cal BP to present.

Type
Soils and Sediments
Information
Radiocarbon , Volume 52 , Issue 3: 20th Int. Radiocarbon Conference Proceedings , 2010 , pp. 1435 - 1442
Copyright
Copyright © 2010 by the Arizona Board of Regents on behalf of the University of Arizona 

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