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Table 3 Average activity concentrations of 238U, 232Th and 40K in soil, rock and ore pad samples in the study area

From: Natural radioactivity levels in soils, rocks and water at a mining concession of Perseus gold mine and surrounding towns in Central Region of Ghana

Sample location

Activity concentration (Bqkg−1)

238U

232Th

40K

P1

97.0 ± 2.4

70.8 ± 2.4

1795.9 ± 17.8

P2

72.0 ± 2.3

84.2 ± 2.2

1445.4 ± 16.3

P3

86.8 ± 2.1

64.4 ± 2.1

1317.2 ± 17.5

P4

56.3 ± 2.0

61.8 ± 2.2

1722.4 ± 14.6

P5

62.2 ± 3.8

116.7 ± 3.0

1445.0 ± 20.4

P6

74.3 ± 2.3

89.6 ± 2.4

1544.1 ± 16.8

O7

62.1 ± 2.1

61.6 ± 2.2

1470.6 ± 17.2

O8

29.0 ± 1.6

35.0 ± 1.6

748.3 ± 12.0

S1

66.4 ± 1.9

81.6 ± 2.1

1241.2 ± 15.0

T1

69.2 ± 2.6

76.1 ± 2.1

844.8 ± 14.9

T2

70.0 ± 1.9

83.7 ± 2.0

720.8 ± 14.6

T3

57.0 ± 2.1

63.9 ± 1.9

500.0 ± 13.9

T4

61.3 ± 2.1

68.7 ± 2.0

749.5 ± 14.6

T5

48.4 ± 1.9

47.1 ± 2.1

811.3 ± 15.1

Range

29.0–97.0

35.0–116.7

500.0–1795.9

Average ± σ

65.1 ± 2.2

71.8 ± 2.2

1168.3 ± 15.8

World average

35

30

400

  1. σ—Standard deviation