Rock type | Sample code | Activity Concentration (Bq∙kg−1)a | Absorbed dose (nGy∙h−1)a | ||||
226Ra | 232Th | 40K | 137Cs | ||||
Igneous Rocks | Granite (Rhyolite) | IGN01 | 9.56 ± 1.15 | 8.36 ± 1.66 | 2100.30 ± 25.40 | NDb | 97.05 |
IGN02 | 12.00 ± 1.26 | 18.00 ± 2.84 | 2400.40 ± 26.50 | 3.62 ± 0.78 | 116.45 | ||
Diorite (Andesite) | IGN03 | 12.00 ± 2.35 | 10.68 ± 1.45 | 867.45 ± 19.10 | 2.40 ± 0.54 | 48.03 | |
IGN04 | 11.50 ± 1.25 | 14.13 ± 2.25 | 1240.50 ± 21.40 | ND | 65.57 | ||
IGN05 | 10.07 ± 1.34 | 8.83 ± 2.70 | 445.70 ± 16.50 | 1.50 ± 0.40 | 28.57 | ||
IGN06 | 11.60 ± 1.11 | 11.50 ± 1.50 | 575.46 ± 17.07 | 4.00 ± 0.58 | 36.30 | ||
IGN07 | 16.05 ± 1.40 | 19.10 ± 3.00 | 2510.00 ± 27.10 | 3.48 ± 0.72 | 123.63 | ||
IGN08 | 17.50 ± 1.42 | 8.30 ± 1.67 | 2895.17 ± 28.30 | ND | 133.83 | ||
IGN09 | 17.00 ± 1.58 | 19.83 ± 2.00 | 2696.45 ± 27.80 | ND | 132.27 | ||
IGN10 | 5.86 ± 1.25 | 9.32 ± 2.45 | 1589.32 ± 22.83 | ND | 74.61 | ||
IGN11 | 13.10 ± 1.48 | 14.00 ± 2.00 | 4854.00 ± 35.00 | ND | 216.86 | ||
IGN12 | 15.60 ± 1.46 | 21.42 ± 1.82 | 2266.58 ± 26.20 | 2.44 ± 0.60 | 114.65 | ||
Gabbro (Basalt) | IGN13 | 6.88 ± 1.13 | 7.26 ± 1.83 | 328.08 ± 15.60 | ND | 21.25 | |
IGN14 | 8.27 ± 1.00 | 5.12 ± 1.01 | 1021.56 ± 20.30 | 5.63 ± 0.63 | 49.50 | ||
IGN15 | 9.25 ± 1.34 | 9.00 ± 1.55 | 1066.17 ± 20.50 | 0.93 ± 0.40 | 54.16 | ||
IGN16 | 7.53 ± 1.27 | 7.76 ± 2.10 | 1297.30 ± 21.27 | 0.90 ± 0.43 | 62.26 | ||
IGN17 | 6.53 ± 1.10 | 8.31 ± 1.41 | 600.00 ± 17.27 | 1.60 ± 0.53 | 33.05 | ||
IGN18 | 6.18 ± 1.36 | 6.14 ± 2.40 | 3154.70 ± 29.43 | ND | 138.12 | ||
Range | 5.86 - 17.50 | 5.12 - 21.42 | 328.08 - 4854.00 | 0.90 - 5.63 | 28.57 - 216.86 | ||
Average | 11.00 | 11.50 | 1172.71 | 1.47 | 86.00 | ||
Sedimentary Rocks | Quartz sandstone | SED19 | 54.85 ± 2.10 | 61.26 ± 6.38 | 6070.75 ± 39.50 | ND | 315.50 |
Greywacke | SED20 | 7.65 ± 1.12 | 9.48 ± 1.16 | 1366.27 ± 21.60 | 4.00 ± 0.62 | 66.24 | |
Shale | SED21 | 10.00 ± 1.13 | 8.00 ± 1.55 | 1216.20 ± 20.70 | 2.87 ± 0.60 | 60.13 | |
SED22 | 6.00 ± 1.23 | 7.47 ± 1.05 | 664.68 ± 17.30 | 2.34 ± 0.57 | 35.00 | ||
SED23 | 10.67 ± 1.35 | 11.36 ± 1.34 | 644.40 ± 17.70 | ND | 38.66 | ||
SED24 | 10.20 ± 1.30 | 10.55 ± 1.46 | 964.78 ± 19.60 | 2.30 ± 0.55 | 51.33 | ||
SED25 | 7.78 ± 1.37 | 7.12 ± 1.16 | 968.84 ± 19.30 | ND | 48.30 | ||
SED26 | 8.58 ± 1.10 | 10.71 ± 2.14 | 110.00 ± 13.00 | 0.84 ± 0.35 | 15.02 | ||
SED27 | 5.58 ± 1.34 | 5.15 ± 1.33 | 136.26 ± 14.80 | 2.00 ± 0.57 | 11.37 | ||
SED28 | 8.03 ± 1.27 | 7.90 ± 1.43 | 340.25 ± 15.53 | 1.30 ± 0.47 | 22.66 | ||
SED29 | 5.23 ± 1.08 | 7.38 ± 1.82 | 401.08 ± 16.30 | 1.95 ± 0.53 | 23.60 | ||
SED30 | 10.00 ± 1.06 | 11.86 ± 1.55 | 693.07 ± 18.50 | 1.57 ± 0.46 | 40.67 | ||
Range | 5.23 - 54.85 | 5.15 - 61.26 | 110.00 - 6070.75 | 0.84 - 4.00 | 11.37 - 315.50 | ||
Average | 12.04 | 13.18 | 1131.36 | 1.60 | 60.70 | ||
| 50 | 50 | 500 |
| 84 |