|本期目录/Table of Contents|

[1]齐继祥,张之淦,彭玉荣,等.一种地下水14C测年沉淀法采样新程序及对以往测年成果可靠性的评估[J].地球科学与环境学报,2016,38(03):387-397.
　QI Ji-xiang,ZHANG Zhi-gan,PENG Yu-rong,et al.New Precipitation Method Sampling Procedure of 14C Dating of Groundwater and the Evaluation of the Formerly-obtained 14C Dating Results[J].Journal of Earth Sciences and Environment,2016,38(03):387-397.
点击复制

一种地下水14C测年沉淀法采样新程序及对以往测年成果可靠性的评估(PDF)
分享到：

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

卷:
第38卷
期数:
2016年第03期
页码:
387-397
栏目:
水资源与环境
出版日期:
2016-05-15

文章信息/Info

Title:
New Precipitation Method Sampling Procedure of 14C Dating of Groundwater and the Evaluation of the Formerly-obtained 14C Dating Results
文章编号:
1672-6561(2016)03-0387-11
作者:
齐继祥; 张之淦; 彭玉荣; 郭华良; 段宝谦
1.中国地质科学院水文地质环境地质研究所,河北 石家庄 050061; 2.中国地质科学院岩溶地质研究所,广西 桂林 541004
Author(s):
QI Ji-xiang;  ZHANG Zhi-gan;  PENG Yu-rong;  GUO Hua-liang;  DUAN Bao-qian
1. Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang 050061, Hebei, China; 2. Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin 541004, Guangxi, China
关键词:
地下水;  14C测年; 偏差; 大气CO2污染; 采样方法; 测量方法; 测年上限; 河北平原
Keywords:
ground water;  14C dating;  deviation;  atmospheric CO2 pollution;  sampling method;  measurement method;  upper limit of dating;  Hebei Plain
分类号:
P641
DOI:
-
文献标志码:
A
摘要:
国际原子能机构推荐的地下水14C测年沉淀法采样程序因未能有效控制大气CO2污染,常使古老地下水14C测年结果偏年轻许多?在分析可能存在的大气CO2污染途径及影响因素的基础上,开发了一种融入多种大气CO2污染控制技术的地下水14C测年沉淀法采样新程序。新采样程序在保持操作简便的前提下,使大气CO2污染得到有效控制;通过专门设计的样品瓶实现了采样程序与制样程序的有效衔接,有利于降低制样程序中的大气CO2污染。以苯合成液体闪烁计数法测定14C比活度,新采样程序使古老地下水14C测年结果(在测年上限50×103年以内)不再产生可识别的偏差。在河北平原地下水14C测年采样中的初步应用显示,早期取得的古老地下水14C测年结果存在较大的负偏差,例如对14C表观年龄约为47×103年的地下水,可偏年轻20×103年以上。因此,有必要对以往取得的古老地下水14C测年结果及由此得出的研究结论是否可靠重新进行评估。地下水14C测年沉淀法采样新程序的推出使传统放射性测量法重新得到重视,因采用的样品量千倍于加速器质谱法,使制样程序中的大气CO2污染更易控制,古老地下水14C测年结果更具可靠性。
Abstract:
The precipitation method sampling procedure of 14C dating of groundwater recommended by IAEA is suffering from atmospheric CO2  pollution. As a result, the dating results tend to be much younger. After analyzing the possible sources of atmospheric CO2  pollution and related influencing factors, a state-of-the-art precipitation method sampling procedure of 14C dating of groundwater was developed to reduce the atmospheric CO2  pollution. This sampling procedure not only integrates various CO2  pollution controlling techniques, but also enjoys easy operation. A specially-designed sample bottle links the field sampling operation and the sample preparing operation effectively. After adopting the new procedure, the negative deviations of the dating results obtained by using benzene-synthesis-liquid-scintillation spectrometer (for the dating results below the upper limit of 50 000 years) are negligible. By comparing the previouslyobtained 14C dating results of ancient groundwater with the results obtained by adopting the new sampling procedure in Hebei Plain, the former exists significant negative deviations. For the groundwater with 14C apparent age of approximately 47×103 years, the dating results tend to be more than 20×103 years younger. Therefore, it is necessary to conduct new evaluations for the formerly-obtained 14C dating results of ancient groundwater and the research conclusions based on the dating results. The new precipitation method sampling procedure of 14C dating of groundwater makes researchers attach importance to the traditional radioactivity measurement method again. Because the sampling quantity is a thousand times more than accelerator mass-spectrometry, it is easier to control the atmospheric CO2 pollution during sample preparation, and the 14C dating results of ancient groundwater are more reliable.

参考文献/References:

-

相似文献/References:

[1]崔恒,郑西来,李琴,等.天然补给和人工抽水对地下咸水体的影响[J].地球科学与环境学报,2013,35(04):113.
　CUI Heng,ZHENG Xi-lai,LI Qin,et al.Effects of Natural Recharge and Artificial Pumping on Underground Saltwater[J].Journal of Earth Sciences and Environment,2013,35(03):113.
[2]郭华明,郭琦,贾永锋,等.中国不同区域高砷地下水化学特征及形成过程[J].地球科学与环境学报,2013,35(03):83.
　GUO Hua-ming,GUO Qi,JIA Yong-feng,et al.Chemical Characteristics and Geochemical Processes of High Arsenic Groundwater in Different Regions of China[J].Journal of Earth Sciences and Environment,2013,35(03):83.
[3]李付兰,倪萍,郭华明,等.松嫩平原含水层沉积物特征及其对砷赋存态分布的影响[J].地球科学与环境学报,2015,37(01):101.
　LI Fu-lan,NI Ping,GUO Hua-ming,et al.Characteristics of Aquifer Sediments in Songnen Plain and Their Influences on Distribution of Arsenic Occurrence Modes[J].Journal of Earth Sciences and Environment,2015,37(03):101.
[4]贾超,张国荣,王嘉斌,等.地下水开采诱发地面沉降研究及其工程应用：以山东德州地区为例[J].地球科学与环境学报,2015,37(04):102.
　JIA Chao,ZHANG Guo-rong,WANG Jia-bin,et al.Study on Land Subsidence Induced by Groundwater Extraction and Its Engineering Application: Taking Dezhou Area of Shandong as an Example[J].Journal of Earth Sciences and Environment,2015,37(03):102.
[5]胡立堂,孙康宁,尹文杰.GRACE卫星在区域地下水管理中的应用潜力综述[J].地球科学与环境学报,2016,38(02):258.
　HU Li-tang,SUN Kang-ning,YIN Wen-jie.Review on the Application of GRACE Satellite in Regional Groundwater Management[J].Journal of Earth Sciences and Environment,2016,38(03):258.
[6]姜军,徐永,马媛.鄂尔多斯盆地都思兔河流域白垩系含水层特征及供水前景分析[J].地球科学与环境学报,2012,34(01):47.
　JIANG Jun,XU Yong,MA Yuan.Characteristics of Cretaceous aquifer and water supply prospect of Dusitu River Valley in Ordos Basin[J].Journal of Earth Sciences and Environment,2012,34(03):47.
[7]高存荣,王俊桃.中国69个城市地下水挥发性卤代烃污染检测与特征研究[J].地球科学与环境学报,2012,34(01):66.
　GAO Cun-rong,WANG Jun-tao.Investigation and research on volatile halogenated hydrocarbon contamination from groundwater in 69 cities of China[J].Journal of Earth Sciences and Environment,2012,34(03):66.
[8]邢丽娜,郭华明,魏亮,等.华北平原浅层含氟地下水演化特点及成因[J].地球科学与环境学报,2012,34(04):57.
　XING Li-na,GUO Hua-ming,WEI Liang,et al.Evolution Feature and Gensis of Fluoride Groundwater in Shallow Aquifer from North China Plain[J].Journal of Earth Sciences and Environment,2012,34(03):57.
[9]李树志,白国良,田迎斌.煤矸石回填地基的环境效应研究[J].地球科学与环境学报,2011,33(04):412.
　LI Shu-zhi,BAI Guo-liang,TIAN Ying-bin.Study on Environmental Effect of Foundation Backfilled with Coal Gangue[J].Journal of Earth Sciences and Environment,2011,33(03):412.
[10]张钦,张黎.银川平原主要水环境问题及其对策[J].地球科学与环境学报,2010,32(04):392.
　ZHANG Qin,ZHANG Li.Main Water Environmental Problem and Its Countermeasures in Yinchuan Plain[J].Journal of Earth Sciences and Environment,2010,32(03):392.

备注/Memo

备注/Memo:
收稿日期:2016-01-18
基金项目:国土资源公益性行业科研专项项目(201511046)
作者简介:齐继祥(1961-),男,河北唐山人,研究员,E-mail:qijixiang@163.com。
更新日期/Last Update: 2016-06-02