Chinese Science Bulletin

, Volume 46, Issue 7, pp 588–591

High-precision uranium-series dating of lacustrine carbonates from Daihai Lake

Authors

  • Qianli Sun
    • Institute of Earth environmentChinese Academy of Sciences
  • Jie Zhou
    • Institute of Earth environmentChinese Academy of Sciences
  • Zicheng Peng
    • Department of Earth and Space ScienceUniversity of Science and Technology of China
  • Weiguo Liu
    • Institute of Earth environmentChinese Academy of Sciences
  • Jule Xiao
    • Institute of Geology & GeophysicsChinese Academy of Sciences
Notes

DOI: 10.1007/BF02900417

Cite this article as:
Sun, Q., Zhou, J., Peng, Z. et al. Chin.Sci.Bull. (2001) 46: 588. doi:10.1007/BF02900417

Abstract

Ages of small aragonite samples retrieved from sediments from the Daihai Lake are determined by using the Thermal Ionization Mass Spectrometry (TIMS) technique. The ages of the samples range from (8740±601) to (10446 ±489) a, with a precision of 2%–3% for non-corrected dating ages and 4.7%-9.8% for corrected ages respectively, and are consistent within the deviation range. At about 10.5 ka BP, the grain-size of the sediments coarsens sharply, the frequency curves of grain-size distribution show coarse grain dominated single-double kurtosis, indicating cooling, decreased hydrodynamic conditions and increased wind influence procedure. This is in good agreement with previous results obtained from the Daihai Lake, which suggests that the climate was cold and the lake surface was shrinking. The TIMS ages of the sediments are therefore believed to be credible.

Keywords

Daihai LakeThermal Ionization Mass Spectrometryaragonite
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Copyright information

© Science in China Press 2001