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 |