228Ra/226Ra activity ratio in groundwater around Mount Fuji, Japan

We estimated the groundwater age from 228Ra/226Ra ratios in young groundwater and relevant rocks in the volcanic area of the Kakitagawa River around Mount Fuji, Japan, and compared our results with those from 3H/3He age determination. The groundwater residence time estimated from the 228Ra/226Ra act...

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Bibliographic Details
Main Authors: Tagami Keiko, Kubota Takumi, Mahara Yasunori, Miyakawa Kimio, Ohta Tomoko, Sato Jun
Format: Article
Language:English
Published: EDP Sciences 2012-04-01
Series:EPJ Web of Conferences
Online Access:http://dx.doi.org/10.1051/epjconf/20122403003
Description
Summary:We estimated the groundwater age from 228Ra/226Ra ratios in young groundwater and relevant rocks in the volcanic area of the Kakitagawa River around Mount Fuji, Japan, and compared our results with those from 3H/3He age determination. The groundwater residence time estimated from the 228Ra/226Ra activity ratio in groundwater and relevant rocks agreed well with the 3H/3He age, suggesting that the 228Ra/226Ra ratio of groundwater can be used to estimate residence time of young groundwater in volcanic areas.
ISSN:2100-014X