详细信息
基于多同位素联用的雷州半岛中深层地下水年龄初探 被引量:1
Preliminary study on the age of groundwater in the middle and deep aquifers of Leizhou Peninsula based on multi-isotopes
文献类型:期刊文献
中文题名:基于多同位素联用的雷州半岛中深层地下水年龄初探
英文题名:Preliminary study on the age of groundwater in the middle and deep aquifers of Leizhou Peninsula based on multi-isotopes
作者:李绍恒[1];陈建耀[1];CENDóN I Dioni[2];陈宗宇[3];胡水明[4];杨国民[4];清水裕太[5];FREUNDT Florian[6];金广哲[7];吴瑞钦[8];高磊[9];梁作兵[1];龚柔艳[1];伍祺瑞[1];田帝[1]
机构:[1]中山大学地理科学与规划学院,广东广州510006;[2]澳大利亚核科学与技术组织,澳大利亚悉尼NSW2052;[3]中国地质科学院水文地质环境地质研究所,河北石家庄050061;[4]中国科学技术大学合肥微尺度物质科学国家研究中心,安徽合肥230027;[5]日本国立农研机构,日本筑波305-8517;[6]德国海德堡大学环境物理研究院,德国海德堡69120;[7]广东海洋大学海洋与气象学院,广东湛江524088;[8]广东省水文局湛江水文分局,广东湛江524043;[9]中国科学院华南植物园,广东广州510650
年份:2022
卷号:61
期号:4
起止页码:95
中文期刊名:中山大学学报(自然科学版)(中英文)
外文期刊名:Acta Scientiarum Naturalium Universitatis Sunyatseni
收录:CSTPCD、、CSCD2021_2022、Scopus、北大核心、CSCD、北大核心2020
基金:国家自然科学基金(41771027,41961144027,41977171);广东省水利厅水利科技创新项目(2020-09);广东省自然资源厅地下水资源调查监测评价项目(0835-210Z22803141)。
语种:中文
中文关键词:雷州半岛;地下水年龄;同位素;^(14)C定年;4He定年
外文关键词:Leizhou Peninsula;groundwater age;isotope;14C dating;4He dating
中文摘要:地下水年龄是一项重要的水文地质参数,其在识别地下水补给来源,评价地下水可更新能力,研究地下水溶质迁移和地下水模型率定及古气候反演等方面可发挥关键作用。本文通过对雷州半岛中深层地下水进行样品采集与^(3)H、^(4)He、^(13)C、^(14)C等同位素测试分析,结合Han-Plummer图形法及同位素校正模型,研究发现从补给区到排泄区地下水年龄逐渐增加,绝大部分地下水样品的^(14)C校正年龄介于1037~40310 aBP,过半地下水样品的校正年龄超过了10000 aBP。地下水样品中的^(4)He同位素含量与^(14)C年龄呈现显著的正相关关系,可根据^(4)He同位素累积率粗略估算地下水年龄。另外,对于不同年龄区段的地下水,电导率与^(14)C校正年龄的关系不同,较年轻地下水年龄与电导率之间明显的正相关关系也为简单估算地下水年龄提供了一种间接方法。
外文摘要:Groundwater age is an important hydrogeological parameter,associated closely with indentification of groundwater recharge sources,groundwater renewability,groundwater solute migration,and reconstruction of palaeoclimatic signals.In this paper,nineteen groundwater samples were collected to analyze ^(3)H,^(4)He,^(13)C,^(14)C from both middle and deep layers of Leizhou Peninsula.Based on the Han-Plummer graphic method and isotope correction model,the apparent age of groundwater was found ranging from 1037 aBP to 40310 aBP with approximately half of sampling sites exceeding 10000 aBP,and increasing gradually from the recharge area in the Shimaoling and Luogangling to the discharge area in the coastal zone.The ^(4)He isotope content in groundwater samples has a significant positive correlation with the ^(14)C age,and the groundwater age can thus be roughly estimated based on the accumulation rate of ^(4)He isotope.In addition,three stages were classified for the relationship between electrical conductivity(EC)and ^(14)C corrected age,yielding an obvious linearity when the apparent age was younger than 6800 aBP,which could then be used to estimate groundwater age with a known EC.
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