Science in China Series D: Earth Sciences

, Volume 42, Issue 5, pp 531–535 | Cite as

Microtektites in the Middle Pleistocene deep-sea sediments of the South China Sea*

  • Quanhong Zhao
  • Zhimin Jian
  • Baohua Li
  • Xinrong Cheng
  • Pinxian Wang


This is a preliminary study on the microtektites that were found in large numbers from the interval between 7.80 and 8.10 m depth of core S095-17957-2 (10°53.9’N, 115°18.3’E, water depth 2 195 m), northern Nansha area of the South China Sea. The microtektites vary in shape, with spherules predominating, and are commonly less than 1 mm in diameter, transparent or semitransparent, brownish in color, with bubbles inside. Based on coarse fraction stratigraphy and foraminifera/nanofossil biostratigraphical events the microtektite layer was assigned to nearly the Bm-hes/Matuyama magnetic reversal boundary (some 0.78 MaBP). Obviously, the present microtektites, and those found from the middle Pleistocene of the Indian Ocean, Australia and loess of northern China, were products of the same impact event and therefore, are useful as a reliable mark in Quaternary stratigraphy, as well as in paleoclimatic studies.


microtektites coarse fraction geological age South china sea 


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Copyright information

© Science in China Press 1999

Authors and Affiliations

  • Quanhong Zhao
    • 1
  • Zhimin Jian
    • 1
  • Baohua Li
    • 2
  • Xinrong Cheng
    • 1
  • Pinxian Wang
    • 1
  1. 1.Laboratory of Marine GeologyTongji UniversityShanghaiChina
  2. 2.Nanjing Institute of Geology and PaleontologyChinese Academy of SciencesNanjingChina

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