Evolution of Quaternary Sedimentary Environment in Shallow Aquifers, at Shahu Area, Jianghan Plain
Wang Yanyan
Huang Shuangbing
Zhao Long
Yi Qing
Abstract：Hydrate-bearing sediments are the fundamental elements for the study of Earth Critical Zone.To broaden the studying dimensions of groundwater environmental problems,14C dating,δ13 C,iron valance and spectroscopic information of dissolved organic matter (DOM) in Shahu sediment profile were employed to characterize the evolution of sedimentary environment of 30 000 years in Jianghan plain.The values of Zr/Rb,Rb/Sr and δ13C indicate that the climates are much warmer and wetter in the periods of sediments formation in 5 to 7 m and 16 to 18 m than others;the ratio of Fe3+/Fe2+ states that sediments in the two periods is mainly in reductive environment.The evolution of sedimentary environment is generalized into five units including unit of weak bioclastic deposition near-surface,unit of strong deposition in warm and wet period based on the factor analysis and spectroscopic information of DOM.Evolution of Quaternary sedimentary environment suggested by sediment profile at Shahu provides essential data for researches on the regional groundwater environmental problems.
Keywords：Jianghan plainsedimentsshallow aquiferevolution of sedimentary environmenthydrogeology
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：10( 751-760 )