Paleoclimate Instruction of Sediment Grain Size and Deuterium-Oxygen Isotope in Saline Stratum of Hengshui
Niu Hong
Liang Xing
Li Jing
Ma Bin
Ge Qin
Abstract：The characteristics of saline stratum in Hengshui have always been concerned.In order to discuss the paleoenviron-ment and the paleoclimate in Hengshui area,grain size and pore water stable isotope (δD,δ18 O)of clay collected from Heng-shui saline stratum(thickness of 130 m)by drilling were analyzed.The standard deviation of sediment grain size shows that the hydrodynamic strength changed from weak to strong and then to weak,there is a deep gravel layer in 90-65 m,which reflects a strong hydrodynamic strength and a humid clime.The TDS andδ18 O reflect the affect of atmospheric precipitation and human irrigation above 6 m,specially for the human irrigation.The mean value ofδ18 O at depth of 130-90 m is -11.5‰,and it is-12.1‰ and -10.6‰ at depth of 65-29 m and 23-0 m.Theδ18 O of aquifer at 90-65 m is -9.8‰,and -8.2‰ of 29-23 m.Theδ18 O of clay pore water is negative compared with the aquifer groundwater,reflecting that the clay pore water saves paleoenvironment information.Theδ18 O at depth of 65-29 m firstly increases and than decreases reflecting the temperature firstly increases and than decreases;theδ18 O at depth of 65-29 m reflects a low temperature;theδ18 O at depth of 23-0 m is relatively stable,but is positive overall,indicating a warm climate in Holocene.
Keywords：Hengshuisediment grain sizeclay pore waterdeuterium-oxygen isotopespaleoclimate
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 499-507 )