南海表层沉积物中放射虫的组合特征与海洋环境

陈木宏; 张兰兰; 张丽丽; 向荣; 陆钧

Volume 33 Issue 6

Jun. 2008

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Article Navigation > Earth Science > 2008 > 33(6): 775-782

CHEN Mu-hong, ZHANG Lan-lan, ZHANG Li-li, XIANG Rong, LU Jun, 2008. Radiolarian Assemblages in Surface Sediments of the South China Sea and Their Marine Environmental Correlations. Earth Science, 33(6): 775-782.

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Radiolarian Assemblages in Surface Sediments of the South China Sea and Their Marine Environmental Correlations

CAS Key Laboratory of Marginal Sea Geology, South China Sea Institute of Oceanology, Guangzhou 510301, China

Received Date: 2008-04-29
Publish Date: 2008-11-25

Abstract

Abstract

The South China Sea (SCS) features relatively complete physiographical units and ecologic environments of marginal sea, where there are a lot of radiolarian species and specimens preserved in the sediments.Methodsof quantitative statistics and clustering were used in this paper to analyze the radiolarian assemblages in surface sediments of the SCS so as to obtain their characteristics of compositions and distributions.Result of clustering analysis shows that the radiolarian assemblage in the surface sediments may be mainly divided into five groups, namely, assemblages of shallow shelf, coral slope, central basin, southern rich nutrition and summer upwelling, corresponding to different special marine environments respectively and consisting of certain radiolarian communities of dominant species.It is also indicated that the northern, central and southern SCS take on as three different ecologic costal areas respectively, such as the north affected mostly by terrigenous input, the central area controlled mainly by the central basin waters, submarine volcanic and summer upwelling activities, and the south generally belonging to a typical coral environment where there is a better ecologic and sedimental environment for radiolarian than in the northern SCS.The radiolarian assemblages and distributions in the SCS surface sediments are well responding to and reveal the marine ecologic conditions and sedimental environments, which may be important evidences for paleoceanographic exploration.
- Radiolarian,
- assemblage character,
- marine environment,
- surface sediment,
- South China Sea

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References

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