Sample name

Activity concentration (Bq/kg))

Activity ratios

²²⁶Ra

²³²Th

⁴⁰K

²²⁶Ra/²³²Th

Basalt-1

08.52 ± 0.01

11.15 ± 0.02

353.75 ± 0.02

0.76

Basalt-2

10.31 ± 0.02

10.68 ± 0.03

213.88 ± 0.02

0.97

Basalt-3

03.04 ± 0.02

03.19 ± 0.02

95.59 ± 0.01

0.95

Basalt-4

10.55 ± 0.01

13.31 ± 0.03

361.52 ± 0.02

0.79

Basalt-5

04.69 ± 0.01

07.57 ± 0.02

155.39 ± 0.02

0.62

Basalt-6

05.55 ± 0.01

06.40 ± 0.02

146.67 ± 0.02

0.87

Basalt-7

07.19 ± 0.02

08.51 ± 0.03

221.25 ± 0.01

0.85

Range

03.04 - 10.91

03.19 - 13.31

95.59 - 361.52

0.62 - 0.97

Average

07.90 ± 0.02

09.14 ± 0.03

234.81 ± 0.02

0.83

Granite-8

112.77 ± 0.01

82.72 ± 0.03

1263.40 ± 0.01

1.36

Granite-9

96.07 ± 0.01

89.13 ± 0.02

1629.21 ± 0.01

1.08

Granite-10

28.42 ± 0.01

33.81 ± 0.03

1260.13 ± 0.02

0.84

Granite-11

86.15 ± 0.02

68.34 ± 0.02

1354.10 ± 0.01

1.26

Range

28.42 - 112.77

33.81 - 89.13

1260.13 - 1629.21

0.84 - 1.36

Average

80.85 ± 0.01

68.50 ± 0.03

1376.69 ± 0.1

1.14

Gold-12

00.78 ± 0.01

01.48 ± 0.02

13.76 ± 0.01

0.53

Gold-13

01.58 ± 0.01

01.90 ± 0.02

133.89 ± 0.01

0.83

Gold-14

11.84 ± 0.02

04.69 ± 0.02

445.09 ± 0.01

2.53

Range

00.78 - 11.84

01.48 - 4.69

13.76 - 445.09

0.53 - 2.53

Average

04.73 ± 0.01

02.69 ± 0.02

197.58 ± 0.01

1.30

Andesite-15

05.72 ± 0.01

03.73 ± 0.02

471.93 ± 0.01

1.53

Marble-16

01.56 ± 0.02

01.38 ± 0.02

10.15 ± 0.01

1.13