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Geochemistry analysis has been done on Core E taken from (37°07'N,118°55'E,depth: 82.1 m) the Laizhou Bay in 1994.Contents of 9 kinds of invariable elements,15 kinds of microelements and lime carbonate are measured by means of ICP.The results indicate that most of the invariable elements and microelements in Core E and the ratios of Mn/Fe,Sr/Ba,Sr/Ca,Ti/Al in especial show significant changes in the boundary strata type.So they can be used as characteristic indicator to distinguish Quaternary strata.The changes of the invariable elements are primarily controlled by the host minerals,and they mainly indicate the provenance as well as the sedimentation and depositional environment.Several elements,such as Fe,Al,Ca,Mg,Mn and Ti,are very sensitive to the provenance and environment.The distributions of microelements differ in four depositional periods: late stage of Middle Pleistocene,last interglacial period,last glacial period and Holocene,and especially in the "cold period" and "warm period".The valleys in the cycle curves of most of microelements correspond with the sand bed sediments,among which there are six sand units representing "warm period" sediments,and one representing "cold period" sediments.The carbonate is on the high side in the aeolian silt sediments formed in the glacial lowering of sea level in Core E,but on the low side in the transgressive sand beds formed in interglacial period.The content variation of carbonate has a direct bearing on the grain size and the styles of sediments,and is a good indicator to the climate,environment and stratigraphic division.
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