Environmentally Sensitive Grain-Size Extraction of Deep Hole Sediment from Tianjin Coastal Plain and Its Significance
He Jishan
Liang Xing
Li Jing
Yang Jilong
Abstract：Sediment environment sensitive granularity is one of the important methods of the ancient environment study,but there are very few complete quaternary sediment core deep hole to extract environmentally sensitive granularity component and analysis in the north China plain regions.Grain size versus standard deviation,and principal component analyses have been ap-plied to extract sensitive grain size components from sediment samples of G1 and G2 in Tianjin Bohai bay.Comparison of ex-traction results of the two methods shows both differences and compatibility.The thinner the thickness of sediment bedding is, the more obvious the compatibility is.It is found that principal component analyses can provide better description while grain size versus standard deviation is not suitable for the deep hole extraction.Six and three environmentally sensitive granularity component peaks appear in G1 and G2 holes,which are 6.70μm,1 5.65 μm,36.24μm,1 76.90μm,282.10μm,71 6.80μm for G1,0.578 μm and 1 76.000 μm for G2 respectively,indicating different sediment sources and sedimentary spatial environment for G1 and G2.Compared with G1 hole,the sedimentary environment of G2 is more stable with stronger deposit strength, which can be used to reconstruct the palaeoenvironment.
Keywords：Tianjin Bohai baygrain sizestandard deviationprincipal component analysissensitive grain-size componentpaleogeographypalaeoenvironment
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：11( 1215-1225 )