Research on the neutron flux, secular equilibrium of chlorine-36   and groundwater age of the deep quaternary sediments, Hebei plain

DONG Yuean

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Research on the neutron flux, secular equilibrium of chlorine-36 and groundwater age of the deep quaternary sediments, Hebei plain

更新时间：2021-03-12

- Research on the neutron flux, secular equilibrium of chlorine-36 and groundwater age of the deep quaternary sediments, Hebei plain
- NUCLEAR TECHNIQUES Issue 8, (2001)
- 作者机构：
  
  1. 北京师范大学低能核物理研究所!北京市辐射中心
  2. 教育部射线束与材料工程开放研究实验室北京,100875
  3. 中国原子能科学研究院核物理研究所,北京,102413
- 作者简介：
- 基金信息：
  
  国家自然科学基金 ( 4 980 2 0 2 5 )资助
- DOI：
  CLC： P641.2
- Published：01 August 2001
- 稿件说明：
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[1]董悦安,何明,蒋崧生,武绍勇,姜山.河北平原深部地层的中子注量率、~(36)Cl/Cl地球长期平衡值及地下水年龄的研究[J].核技术,2001(08):636-640.

DONG Yuean. Research on the neutron flux, secular equilibrium of chlorine-36 and groundwater age of the deep quaternary sediments, Hebei plain[J]. Nuclear techniques, 2001, (8): 636-640.
[1]董悦安,何明,蒋崧生,武绍勇,姜山.河北平原深部地层的中子注量率、~(36)Cl/Cl地球长期平衡值及地下水年龄的研究[J].核技术,2001(08):636-640. DOI：

DONG Yuean. Research on the neutron flux, secular equilibrium of chlorine-36 and groundwater age of the deep quaternary sediments, Hebei plain[J]. Nuclear techniques, 2001, (8): 636-640. DOI：

摘要

为研究河北平原深部地层的中子注量率和3 6 Cl/Cl地球长期平衡值

应用中子活化分析技术测量了岩石样品的元素含量数据。根据这些数据

计算了河北平原第四系深部地层的中子注量率平均值为 2 .79× 10 - 5cm- 2 s- 1

3 6 Cl/Cl地球长期平衡值平均为 1.2 7× 10 - 14 。为研究河北平原深部地层地下水的年龄

应用加速器质谱法测量得到保定地区第四系第二、三含水组混合开采井及第四含水组钻孔地下水的3 6 Cl/Cl值分别为 2 4 7× 10 - 15和 2 2 4× 10 - 15

皆为新水 ;沧州地区第三含水组钻孔地下水的3 6 Cl/Cl值为 4 0 .5× 10 - 15

依据其计算的地下水年龄为 2 3万年左右。

Abstract

For the study of the neutron flux

secular equilibrium of chlorine-36 in the deep quaternary sediments of Hebei plain

the main chemical composition of water sand and confining bed was determined by neutron activation analysis. The mean neutron flux is 2.79×10 -5 cm -2 s -1 which was calculated by the chemical composition of the strata. The mean 36 Cl/Cl ratio in secular equilibrium is 1.27×10 -14 in the deep quaternary sediments

Hebei Plain. For the study of the groundwater age of the deep Quaternary sediments of Hebei Plain

the 36 Cl/Cl ratio of groundwater samples were determined by tandem accelerator mass spectrometry. The mixed groundwater 36 Cl/Cl ratio of the second and the third aquifer of Quaternary sediments in Baoding district is 247×10 -15

that of the fourth aquifer in Baoding city is 224×10 -15 and the third aquifer in Cangzhou district is 40.5×10 -15 . The groundwater age of Baoding district was young and that of the third aquifer in Cangzhou was 229.2ka.

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