170
Table 2 Concentrations of U and Th and U/Th ratios in bedrocks and nonagricultural soils in
Japan
Bedrock
a
Prefecture Th, mg kg
-1 U, mg kg
-1 U/Th References
RM
b
Andesite
Kanagawa
0.82
0.34
0.41 AIST (2018)
JA-1
Kagawa
5.03
2.21
0.44 AIST (2018)
JA-2
Gunma
3.25
1.18
0.36 AIST (2018)
JA-3
Akita
3.14
0.78
0.25 Ebihara et al. (1984)
Niigata
8.59
1.54
0.18 Ebihara et al. (1984)
Kagoshima 8.78
2.05
0.23 Tezuka (1972)
Akita
3.90
1.18
0.30 Shibata and Nakamura (1997)
GM
c
3.84
1.14
0.30
Soil from andesite
5.62
1.53
0.27 Minato (2005)
Basalt
Nagasaki
9.30
1.67
0.18 AIST (2018)
JB-1
Tokyo
0.35
0.18
0.51 AIST (2018)
JB-2
Yamanashi 1.27
0.48
0.38 AIST (2018)
JB-3
Akita
6.98
1.70
0.38 Ebihara et al. (1984)
Iwate
0.24
0.08
0.32 Shibata and Nakamura (1997)
Yamagata
0.40
0.09
0.22 Shibata and Nakamura (1997)
Akita
0.57
0.18
0.32 Shibata and Nakamura (1997)
Akita
0.48
0.17
0.34 Shibata and Nakamura (1997)
Yamagata
3.90
1.11
0.28 Shibata and Nakamura (1997)
Akita
6.22
1.74
0.28 Shibata and Nakamura (1997)
Hokkaido
1.67
0.51
0.31 Shibata and Nakamura (1997)
GM
1.37
0.41
0.31
Soil from basalt
3.88
0.97
0.25 Minato (2005)
Rhyolite
Nagano
26.7
8.88
0.33 AIST (2018)
JR-1
Nagano
31.4
10.9
0.35 AIST (2018)
JR-2
Kouchi
112
21.1
0.19 AIST (2018)
JR-3
Gifu
12.3
2.88
0.23 Tezuka (1972)
Miyagi
7.5
1.63
0.22 Ebihara et al. (1984)
GM
24.4
6.26
0.26
Soil from rhyolite
8.95
2.33
0.26 Minato (2005)
GD
d
Gunma
13.2
3.47
0.26 AIST (2018)
JG-1
GR
e
Gifu
31.6
11.3
0.36 AIST (2018)
JG-2
GD
Shimane
8.3
2.21
0.27 AIST (2018)
JG-3
GD
Kagoshima 15.5
5.58
0.35 Tezuka (1972)
GR
Gifu
24.0
4.10
0.17 Katoh et al. (1985)
GR
Ibaraki
13.0
1.90
0.15 Katoh et al. (1985)
GM
16.0
3.94
0.25
Soil from GD
d and GR
e
15.3
3.03
0.20 Minato (2005)
Limestone Hokkaido
0.03
1.75
61 AIST (2018)
JLs-1
Dolomite Tochigi
0.04
0.86
20 AIST (2018)
JDo-1
Slate
Miyagi
9.97
2.63
0.26 AIST (2018)
JSl-1
Slate
Miyagi
11.5
2.92
0.25 AIST (2018)
JSl-2
(continued)
K. Tagami and S. Uchida