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地下含水介质是地球关键带的重要研究对象,为了拓展江汉平原地下水环境问题研究维度,综合应用~(14)C测年、δ~(13) C、铁价态以及沉积物溶解态有机质(dissolved organic matter,DOM)的光谱信息等重要环境指标,对沙湖地区近30ka的浅层含水层第四纪沉积环境演化特征进行了概化分析.沉积物中Zr/Rb、Rb/Sr比值以及δ13 C值表明,剖面在5~7m和16~18m范围相对其他深度更显暖湿气候特征;Fe~(3+)/Fe请下载后查看，本文暂不支持在线获取查看简介。(2+)比值及沉积物颜色说明这两段暖湿期沉积物主要呈现还原环境.基于因子分析和DOM光谱信息可将沉积剖面的沉积环境演化概化为“近地表弱生物碎屑沉积单元”和“暖湿期强沉积单元”等5个单元.本沉积剖面所记录的沉积环境演化信息可为该区的地下水环境等相关问题的深入研究提供重要的背景支撑.
In order to expand the research dimension of groundwater environmental problems in Jianghan Plain, the underground aquifer medium is an important research object in the key zone of the earth. Comprehensive application of ~ (14) C dating, δ ~ (13) C, iron valence state and dissolved dissolved organic matter organic matter (DOM) and other important environmental indicators, the evolutionary characteristics of Quaternary sedimentary environment in shallow aquifers in the recent 30 ka in Shahu area were analyzed.The Zr / Rb, Rb / Sr ratios and δ13 The C value indicates that the profile is more warm and wet than other depths in the range of 5 ~ 7m and 16 ~ 18m. Fe ~ (3 +) / Fe can be viewed after download. This article is not available for online viewing. (2+) ratio and the sediment color indicate that the sediments in the two warm and wet periods are mainly in a reducing environment. Based on the factor analysis and the DOM spectral information, the evolution of the sedimentary environment in the sedimentary section can be generalized as “near-surface weak biological clastic sediments Unit ”and“ warm and wet period strong sedimentary unit ”, etc. The sedimentary environment evolution information recorded in this sedimentary section can provide important background support for the in-depth study of groundwater environment and other related issues in this area.