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Original component of grain size index in core sediment from southwestern slope of the South China Sea and its paleoenvironmental implication
Chen, MH; Zheng, F; Lu, J; Xiao, SB; Yan, W; Chen, Z; Xiang, R; Wei, GJ; Zhang, LL; mhchen@scsio.ac.cn
2005
发表期刊CHINESE SCIENCE BULLETIN
ISSN1001-6538
卷号50期号:9页码:896-902
摘要A new approach to the basic composition character of deep sea sediment is discussed in this paper for indicating its paleoenvironment meaning. For this purpose high precision grain size character of sediments from core NS93-5 was analysed by using the Laser Diffraction Particle Size Analyzer, combining with results of micropalaeontologic counting and trace element and calcium carbonate testing, to illustrate some main grain size indexes and their relationship with micropalaeontologic makeup and terrigenous input. It was showed that the grain sizes of deep sea sediment may reflect materials properties and their buildup framework. There are obvious relations between indexes of grain size ranges and abundances of different micropalaeontologic groups and terrigenous matters, in which grain size of < 2 mu m represents terrigenous composition, that of > 5 mu m is mainly made up of various microfossil shells, except for containing volcanic dust layers, and median diameter (MD) of grain size may be taken as proxy of paleoproductivity or paleoecological dynamic. These index and proxy were consistent with micropaleontologic records for well indicating important features of paleoceanographic ecology, showing that the micropalaeontologic growth in the southwestern slope area of the South China Sea (SCS) was negatively correlated to terrigenous input since late Pleistocene and corresponded to glacial-interglacial global climatic changes incompletely, but had a regional particularity in this sea area.
部门归属Chinese Acad Sci, S China Inst Oceanol, Guangzhou 510301, Peoples R China; Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China
关键词Grain Size Index Materials Composition Microfossil Paleoecological Environment South China Sea
学科领域Multidisciplinary Sciences
收录类别sci
资助项目海洋地质
WOS记录号WOS:000230474700011
引用统计
被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/4864
专题中科院边缘海地质重点实验室
通讯作者mhchen@scsio.ac.cn
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GB/T 7714
Chen, MH,Zheng, F,Lu, J,et al. Original component of grain size index in core sediment from southwestern slope of the South China Sea and its paleoenvironmental implication[J]. CHINESE SCIENCE BULLETIN,2005,50(9):896-902.
APA Chen, MH.,Zheng, F.,Lu, J.,Xiao, SB.,Yan, W.,...&mhchen@scsio.ac.cn.(2005).Original component of grain size index in core sediment from southwestern slope of the South China Sea and its paleoenvironmental implication.CHINESE SCIENCE BULLETIN,50(9),896-902.
MLA Chen, MH,et al."Original component of grain size index in core sediment from southwestern slope of the South China Sea and its paleoenvironmental implication".CHINESE SCIENCE BULLETIN 50.9(2005):896-902.
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