河北平原第四系深层地下水<sup>36</sup>Cl同位素年龄的研究

董悦安; 何明; 蒋崧生; 武绍勇; 姜山

河北平原第四系深层地下水³⁶Cl同位素年龄的研究

董悦安^1,,
何明^{1, 2, 3},
蒋崧生⁴,
武绍勇⁴,
姜山⁴

1.
北京师范大学低能核物理研究所, 北京 100875
2.
北京市辐射中心, 北京 100875
3.
教育部射线束与材料工程开放研究实验室, 北京 100875
4.
中国原子能科学研究院核物理研究所, 北京 102413

基金项目:

国家自然科学基金项目 49802025

详细信息

作者简介:
董悦安（1965-）, 男, 副研究员, 1997年毕业于中国地质大学（北京）, 获博士学位, 目前主要从事核分析技术在水文地质学中的应用研究.E-mail: dyuean@263.net

中图分类号: P641.3;P597
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出版历程
- 收稿日期: 2001-03-28
- 刊出日期: 2002-01-25

Chlorine-36 Age Study for Deep Groundwater of Quaternary Sediments, Hebei Plain

1.
Institute of Low Energy Nuclear Physics, Beijing Normal University, Beijing 100875, China
2.
Beijing Radiation Center, Beijing 100875, China
3.
Radiation Beams and Material Engineering Laboratory of Education Ministry, Beijing 100875, China
4.
Institute of Nuclear Physics, China Institute of Atomic Energy, Beijing 102413, China

摘要

摘要: 为研究河北平原第四系深层地下水的年龄, 应用加速器质谱计对河北平原深层地下水样品的N(³⁶Cl) /N(Cl) 进行了测定, 计算了其年龄, 并与地下水动力学年龄进行了对比研究.结果表明, 河北冲洪积平原山前地带保定市第四系第三和第四含水组的地下水年龄皆很小, 为近期补给的地下水.中部地带保定地区东部和沧州地区西部的第三含水组地下水年龄皆小于5万a, 第四含水组地下水的年龄可能大于10万a.边缘地带沧州市和青县第三含水组地下水年龄为8~ 9万a左右, 东光县为2 6万a左右; 沧州市第四含水组地下水年龄为33万a左右, 东光县为77万a左右.
- ³⁶Cl同位素年龄 /
- 加速器质谱计 /
- 河北平原
Abstract: For the study of the groundwater age in the deep formation of Quaternary sediments of Hebei plain, the N(³⁶Cl)/N(Cl) ratio of groundwater samples were determined by tandem accelerator mass spectrometry. The chlorine 36 ages were compared with hydrodynamic ages. The groundwater of the third and fourth aquifers of Quaternary sediments in the Baoding district of Hebei plain was found young, that of the third aquifer in the east of Baoding district and the west of Cangzhou district being less than 50 thousand years and that of the fourth aquifer, perhaps more than 100 thousand years. While the groundwater age of the third aquifer in Cangzhou city and Qingxian county was 80-90 thousand years and that in Dongguang county was 260 thousand years, that of the fourth aquifer in Cangzhou city was 330 thousand years and that in Dongguang county was 770 thousand years.
- chlorine 36 age /
- accelerator mass spectrometry /
- Hebei plain

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图 1 取样井示意

Fig. 1. Schematic diagram of sampling location

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图 2 加速器质谱计装置

Fig. 2. Schematic diagram of tandem accelerator mass spectrometry system

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图 3 河北平原第四系深层地下水³⁶Cl同位素年龄和地下水动力学年龄对比

92.第四系第三含水组的³⁶Cl同位素年龄/ka; (770).第四系第四含水组的³⁶Cl同位素年龄/ka; [400].第三系含水组的³⁶Cl同位素年龄/ka; A220.第四系第三含水组的水动力学年龄/ka; (A580).第四系第四含水组的水动力学年龄/ka

Fig. 3. Comparison of hydrodynamic ages and³⁶Cl groundwater ages in the deep formation of Quaternary sediments of Hebei Plain

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表 1 ³⁶Cl制样记录

Table 1. Data of sample preparation

表 2 地下水样品的N (³⁶Cl) /N (Cl) 比值及年龄计算结果

Table 2. N (³⁶Cl) /N (Cl) ratio and age of several aquifers in groundwater

参考文献(18)

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