Apparent penetration of fallout 137Cs into rocks in Izu-Oshima.

Kimura Kan, Saito Yuko, Sabanai Mariko, Hirao Yoshimitsu, Sato Jun, Sato Kazuo

doi:10.2343/geochemj.17.303

Apparent penetration of fallout 137Cs into rocks in Izu-Oshima.

DOI Web Site

Kimura Kan

College of science and engineering, Aoyama Gakuin University
Saito Yuko

College of science and engineering, Aoyama Gakuin University
Sabanai Mariko

College of science and engineering, Aoyama Gakuin University
Hirao Yoshimitsu

College of science and engineering, Aoyama Gakuin University
Sato Jun

Department of Industrial Chemistry, Faculty of Engineering, Meiji University
Sato Kazuo

Earthquake Research Institute, University of Tokyo

抄録

The distribution of ¹³⁷Cs in volcanic rocks was measured for sliced samples of solid lava blocks from Izu-Oshima island, Japan. The decrease in ¹³⁷Cs concentration with the increase in depth, together with the uneven spatial distribution, suggested that the fallout was responsible for the occurrence of ¹³⁷Cs and that ¹³⁷Cs might have penetrated into lavas as deep as several centimeters.