Origin and Geochemical Processes of Porewater in Clay-Rich Deposits in the North Jiangsu Coastal Plain, China
Origin and Geochemical Processes of Porewater in Clay-Rich Deposits in the North Jiangsu Coastal Plain, China
复制标题
苏北沿海平原富粘土矿床孔隙水来源及地球化学过程
DOI：
10.1155/2017/5486297
复制
发表时间：
2017
期刊：
影响因子：
1.7
通讯作者：
Liu Yan
中科院分区：
文献类型：
--
作者：
Ge Qin;Liang Xing;Jin Menggui;Li Jing;Liu Yan
通过对苏北滨海平原3个钻孔弱透水层孔隙水的水文地球化学和稳定同位素组成的研究，探讨了该地区水的成因、盐渍化和水化学演化。根据含水子系统，确定了三个孔隙水组。孔隙水样品的总溶解固体（TDS）变化很大，从0.03到26.1 g/L。Cl/Br摩尔比和δ 18 O、δ 2 H数据表明，第1组矿化孔隙水来源于全新世海水，而第3组矿化孔隙水可能与晚更新世残留的古海水有关。第2组样本的盐度较低（TDS < 1 g/L），且无法检测到Br−浓度，可能是在较冷的时期重新充电，没有海水参与的证据。矿化孔隙水可能被淡水稀释，这一点可以从其同位素耗尽和相对于标准海水的低盐度得到证明。离子比和离子三角洲表明，相当大的水-岩相互作用（例如，阳离子交换和矿物风化）也占孔隙水的水化学成分，阳离子交换似乎在低盐度下更显着。
The hydrogeochemical and stable isotope compositions of aquitard porewater samples from three boreholes were investigated to determine the origin, salinization, and hydrochemical evolution of water in the North Jiangsu coastal plain, China. Three porewater groups were identified based on the water-bearing subsystems. The total dissolved solids (TDS) of porewater samples highly varied from 0.03 to 26.1 g/L. Molar Cl/Br ratios and δ18O and δ2H data indicate that the source of Group 1 salinized porewater was the Holocene seawater, whereas Group 3 salinized samples were probably related to the remnant palaeoseawater of the Late Pleistocene. Group 2 samples had low salinity (TDS < 1 g/L) and undetectable Br− concentrations, which were probably recharged during a colder period and without evidence of seawater involvement. The salinized porewater was likely diluted by freshwater, as evidenced by its depleted isotopes and low salinity relative to standard seawater. The ionic ratios and ionic deltas indicate that considerable water-rock interactions (e.g., cation exchange and mineral weathering) also accounted for the hydrochemical constituents of porewaters, and cation exchange seems to be more noticeable at low salinity.
登录
查看更多内容
影响因子：
3
作者：
P. Ridout;R. Pagett
通讯作者：
P. Ridout;R. Pagett
影响因子：
6.4
作者：
ARAGUASARAGUAS, L;ROZANSKI, K;LOUVAT, D
通讯作者：
LOUVAT, D
影响因子：
3.6
作者：
D. Desaulniers;J. Cherry
通讯作者：
D. Desaulniers;J. Cherry
影响因子：
2.8
作者：
E. Sacchi;J. Michelot;H. Pitsch;P. Lalieux;J. Aranyossy
通讯作者：
E. Sacchi;J. Michelot;H. Pitsch;P. Lalieux;J. Aranyossy
影响因子：
2.8
作者：
E. Karro;A. Marandi;R. Vaikmäe
通讯作者：
E. Karro;A. Marandi;R. Vaikmäe