河北平原第四系咸水同位素组成

Isotopic composition of saline water in quaternary aquifers of HeBei plain

本文讨论了河北平原地下咸水的同位素组成。并且依据水文地质、水化学和同位素特征将咸水成因分为两种类型，即大陆盐化成因和海水成因咸水。前者δ１８Ｏ＜－７．００‰，δＤ＜－５５．０‰，３６Ｃｌ／Ｃｌ＞５７±９（×１０－１５），１４Ｃ年龄为１０００～４０００ａ（校正）；后者δ１８Ｏ＞－７．００‰，δＤ＞－５５．０‰，δ３７Ｃｌ值接近海水值，１４Ｃ年龄大于１００００ａ（校正），咸水中的海水百分比大于３８．０％。

This paper discusses the isotopic compositions of saline groundwater in Hebei plain and divides the saline water genetically into two types based on the hydrogeological,hydrochemical and isotopic characters i.e.the type of continental salinization and that of sea water origin.In the former type δ 18 O<-7 00‰, δ D<-55 0‰, 36 Cl/Cl>57±9(×10 -15 ) and 14 C ages are 1000～4000a(corrected).In the latter type δ 18 O and δ D are more than -7 00‰ and -55 0‰ respectively, δ 37 Cl approximates to the value of marine water and 14 C ages are more than 10 000a (corrected).The amount of sea water in saline water is more than 38 0%.