Advertisement

Chinese Science Bulletin

, Volume 43, Issue 17, pp 1434–1441 | Cite as

U-series dating on late Quaternary sediments from Balikun Lake

  • Jiaqi Liu
  • Zhibang Ma
Article

Abstract

The U-series component-dating method has been employed to date the sediment core B194 from Balikun Lake.230Th/232Th and234U/232Th ratios in various components of the samples dissolved in different concentration acids were measured respectively. The results indicate that there is a good relationship of the isotopic ratios between the solutions and the residues, and that uranium and thorium isotopic fractionations did not occur during acid leaching. Based on the U-series ages obtained by using component-dating method, a 144-ka time sequence was established corresponding to the upper 25-m interval of the B194 core, which is in agreement with palaeomagnetic dating results. The fact that the palaeoclimatic and palaeoenvironmental record labeled with U-series ages is correlative with the deepsea °18O SPECMAP also demonstrates that the U-series component-dating method can be used to date lake sediments.

Keywords

Balikun Lake sediments component-dating model U-series age 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Ivanovich, M., Harmon, R. A.,Uranium-Series Disequilibrium: Applications to Earth, Marine, and Environmental Sciences, 2nd ed., Oxford: Clarendon Press, 1992, 566–569.Google Scholar
  2. 2.
    Luo, S. D., Ku, T. L., U-series isochron dating: A generalied method employing total-sample dissolution,Geochim. Cosmochim. Acta, 1991, 55(20): 555.CrossRefGoogle Scholar
  3. 3.
    Phillips, F. M., Ku, T. L., Huang Q.et al.,230Th/234U and36Cl dating of evaporate deposits from the Western Qaidarn Basin, China: Implications for glacial-period dust export from Central Asia,Geological Society of Amrican Bulletin, 1993, 105: 1606.CrossRefGoogle Scholar
  4. 4.
    Szabo, B. J., Bush, C. A., Uranium-series dating of carbonate (tufa) deposits associated with Quaternary fluctuations of Pyramid Lake, Nevada,Quat. Res., 1996, 45(3): 271.CrossRefGoogle Scholar
  5. 5.
    Marcel, C. H., Ghaleb, C., Gariepy, C.et al., U-series dating by the TIMS technique of Land Snails from paleosols in the Canary Islands,Quat. Res., 1995, 44(2): 276.CrossRefGoogle Scholar
  6. 6.
    Ludwing, K. R., Titterington, D. M., Calculation of230Th/U isochrons, ages and errors, Geochim,Cosmochim. Acta. 1994, 58: 5031.CrossRefGoogle Scholar
  7. 7.
    Xia Ming, Zhang Chenghui, Ma Zhibang, Studies on uranium palaeoanthropologic and series dating of peat samples,Quaternaria Sinica (in Chinese). 1989. 8(1): 17.Google Scholar
  8. 8.
    Han Shuti, Yuan Yujiang. The sequence of palaeoclimatic variation of Balikun Lake of Xinjiang in the past 35 000 years,Acta Geogmphica Sinica (in Chinese), 1990, 45(3): 350.Google Scholar
  9. 9.
    Xia Ming, Discussion on results of the uranium-series intercomparison project,Scientia Geologica Sinica (in Chinese), 1984. (1): 13.Google Scholar
  10. 10.
    Imbrie, J., Hays, J., Martinson, D.et al., The orbital theory of Pleistocene climate: support from a revised chmmlogy of the Marine Delta18O record, inMilankovitch and Climate (eds. Berger, A. L.et al.), Dordrecht: Reidel Publishing Company, 1984, 269–305.Google Scholar

Copyright information

© Science in China Press 1998

Authors and Affiliations

  • Jiaqi Liu
    • 1
  • Zhibang Ma
    • 1
  1. 1.Institute of GeologyChinese Academy of SciencesBeijingChina

Personalised recommendations