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Chinese Science Bulletin

, Volume 45, Issue 24, pp 2277–2280 | Cite as

Age estimation of the mid-Pleistocene microtektite event in the South China Sea: A case showing the complexity of the sea-land correlation

  • Jiliang Wang
  • Quanhong Zhao
  • Xinrong Cheng
  • Rujian Wang
  • Pinxian Wang
Notes

Abstract

The present study confirms the stratigraphical position of microtektite layer being clearly located below the Brunhes/Matuyama (BIM) boundary. Based on the sedimentation rate derived from the stable isotopic and magnetic data of ODP Site 772A, cores 17957 and 17959 in the South China Sea, the age of the mid-Pleistocene impact event was estimated at 1–12 ka earlier than the Brunhes-Matuyama polarity reversal. However, the microtektites were found above the measured BIM boundary in the loess profile due to the downward deviation of the measured B/M boundary from its true position[1]. This demonstrates the complexity of paleo-magnetic records in the loess profiles which, in turn, causes the confusion in the sea-land stratigraphic correlation.

Keywords

microtektites Brunhes/Matuysma (BN) boundary mid-Pleistocene sea-land correlation 

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References

  1. 1.
    Zhou, L. P., Shackleton, N. J., Misleading position of geomagnetic reversal boundaries in Eurasian loess and implications for correlation between continental and marine sedimentary sequences, Earth and Planetary Science Letters, 1999, 168: 117.CrossRefGoogle Scholar
  2. 2.
    Ouyang Ziyuan el al., Impact of Asteroid & Paleoenvironmental Catastrophe—Study on Six Cenozoic Bolide-impact Events (in Chinese), Hubei Sci. & Tech. Publ., 1997, 1–170.Google Scholar
  3. 3.
    Yuan Baoyin, Preliminary discussion on the origin of Lei-Gong-Mo (tektites), Sci. Geologica Sinica (in Chinese), 1981, 4: 229.Google Scholar
  4. 4.
    Zhang Hunan, Chen Weiguang, Li Ziquan et al., Discovery of tektite in west Guangdong and its sense for determination of the age, Mar. Geol. & Quat. Geol. (in Chinese), 1991, 11(4): 101.Google Scholar
  5. 5.
    Li Chunlai, Ouyang Ziyuan, Liu Tungsheng et al., Microtektites and glassy micmspherules in loes—their discoverries and implications, Sci. in China, Ser. B, 1993, 36: 1141.Google Scholar
  6. 6.
    Xu Heling, Wu Xihao, Deng Jiwen et al., Discoveries of the unusual micrograins in the loess strata and their preliminary studies, Mar. Geol. & Quat. Geol. (in Chinese), 1993, 13(3): 57.Google Scholar
  7. 7.
    Zhao Quanhong, Jian Zhumin, Li Baohua et al., Microtektites in the middle Pleistocene deep-sea sediments of the South China Sea, Science in China. Ser. D, 1999, 42(5): 531.CrossRefGoogle Scholar
  8. 8.
    Smit, J., van Eijden, A. J. M., Troelstra, S. R., Analysis of the Australasian microtaktite event, the Toba event, and the Cretaceous/Paleogene boundary, eastern Indian Ocean. Proc. ODP Sci. Res., 1991. 121: 489.Google Scholar
  9. 9.
    Schneider, D. A., Kent, D. V., Mello, G. A., A detailed chronology of the Autralasian impact event, the Brunhes-Matuyama geomagnetic polarity reversal, and global climate change. Earth and Planetary Science Letter, 1992, 111: 395.CrossRefGoogle Scholar
  10. 10.
    Harding, B. W., Storms, M. A. et al., Proceedings of the Ocean Drilling Program, Initial Reports, 1990, 124: 75.Google Scholar
  11. 11.
    Sarnthein, M., Plaumann, U., Wang, P. et al., Preliminary report on Sonne-95 cruse “monitor monsoon” to the South China Sea, Ber.-Rep., Geol.-Paleont. Inst. Univ. Kiel, Germany, 1994, 68, 255.Google Scholar
  12. 12.
    Berger, W. H., Bicken, T., Wefer, G. et al., Brunhes-Matuyama boundary: 790 ky date consistent with ODP Leg 130 oxygen isotope records based on tit to Milankovitch, Geophysical Research Letters, 1995, 22(12): 1525.CrossRefGoogle Scholar
  13. 13.
    Berggren, W. A., Kent, D. A., Swisher III, C. C. et al., A review Cenozoic geochmnology and chronostratigraphy, Geochronology, Time Scale and Global Stratigraphic Correlation (eds. Berggren, W. A. et al.), Spec. Publ. Soc. Econ. Palrontol. Mineral., 1995, 54:129.Google Scholar
  14. 14.
    Jian, Z., Wang, P., Chen, M. P. et al., Foraminifera1 response to major Pleistocene paleoceanographic changes in the southern China Sea, Paleoceanography, 2000, 15(2): 229.CrossRefGoogle Scholar
  15. 15.
    Peirce, J., Weissel, J., Taylor, E. et al., Broken Ridge and Ninetyeast Ridge, Proc. ODP, 1991, 121: 869.Google Scholar
  16. 16.
    Kukla, G., An, Z. S., Loess stratigraphy in central China, Palaeogeog, Palaeoclimat, Palaeoecol., 1989, 72: 203.CrossRefGoogle Scholar
  17. 17.
    Ding, Z. L., Yu, Z. W., Rutter, N. W. et al., Towards an orbital time scale for Chinese loesse deposits, Quaternary Science Reviews, 1994, 13: 39.CrossRefGoogle Scholar

Copyright information

© Science in China Press 2000

Authors and Affiliations

  • Jiliang Wang
    • 1
  • Quanhong Zhao
    • 1
  • Xinrong Cheng
    • 1
  • Rujian Wang
    • 1
  • Pinxian Wang
    • 1
  1. 1.Laboratory of Marine Geology, MOETongji UniversityShanghaiChina

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