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

被引:6
作者
Quanhong Zhao
Zhimin Jian
Baohua Li
Xinrong Cheng
Pinxian Wang
机构
[1] Tongji University,Laboratory of Marine Geology
[2] Chinese Academy of Sciences,Nanjing Institute of Geology and Paleontology
来源
Science in China Series D: Earth Sciences | 1999年 / 42卷
关键词
microtektites; coarse fraction; geological age; South china sea;
D O I
暂无
中图分类号
学科分类号
摘要
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.
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页码:531 / 535
页数:4
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