A new 14C data set of the PY608W-PC sediment core from lake pumoyum co (Southeastern Tibetan Plateau) over the last 19 KYR

Takahiro Watanabe, Tetsuya Matsunaka, Toshio Nakamura, Mitsugu Nishimura, Yasuhiro Izutsu, Motoyasu Minami, Fumiko Watanabe Nara, Takeshi Kakegawa, Liping Zhu

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Abstract

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.

Original languageEnglish
Pages (from-to)1435-1442
Number of pages8
JournalRadiocarbon
Volume52
Issue number3
DOIs
Publication statusPublished - 2010 Aug

ASJC Scopus subject areas

  • Archaeology
  • Earth and Planetary Sciences(all)

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    Watanabe, T., Matsunaka, T., Nakamura, T., Nishimura, M., Izutsu, Y., Minami, M., Nara, F. W., Kakegawa, T., & Zhu, L. (2010). A new 14C data set of the PY608W-PC sediment core from lake pumoyum co (Southeastern Tibetan Plateau) over the last 19 KYR. Radiocarbon, 52(3), 1435-1442. https://doi.org/10.1017/S0033822200046518