The Sediment Susceptibil ity and Grain-size Profile Respond to Change of Depositional Environment in Nihewan Basin

YANG Xiao-qiang; LI Hua-mei

Sampling the 1674 in Haojiatai,Xiaochangliang and Donggutuo sections in Nihewan bain based on the field works, and studying their quality susceptibility value and analysing their grain size characteristics. The results show that the change of susceptibility value and grain-size profile of lacustrine sediments relect the change of paleoclimate to some extent. The high values of susceptilbility and low fraction of fine grain indisate the cold and dry weather or the elevation of the basin,vice versa. In addition,the fine floating grain fraction between 0.2μm and 7.5μm may compare with isotope stage,which may good service fixing the high frequency age and studying the paleoclimate change in lacustrine sediments.

The Guangzhou Iustitute of Geochemistry, CAS,Guagnzhou 510640

Received Date: 1999-05-17

Publish Date: 1999-12-10

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Abstract: Sampling the 1674 in Haojiatai,Xiaochangliang and Donggutuo sections in Nihewan bain based on the field works, and studying their quality susceptibility value and analysing their grain size characteristics. The results show that the change of susceptibility value and grain-size profile of lacustrine sediments relect the change of paleoclimate to some extent. The high values of susceptilbility and low fraction of fine grain indisate the cold and dry weather or the elevation of the basin,vice versa. In addition,the fine floating grain fraction between 0.2μm and 7.5μm may compare with isotope stage,which may good service fixing the high frequency age and studying the paleoclimate change in lacustrine sediments.

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The Sediment Susceptibil ity and Grain-size Profile Respond to Change of Depositional Environment in Nihewan Basin

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