Sample | IRSL50 | pIRIR150 | |||||||
---|---|---|---|---|---|---|---|---|---|
Dose recovery ratio | g-value (%/decade) | Uncorrected age (ka) | Corrected age (ka) | Dose recovery ratio | g-value (%/decade) | Uncorrected age (ka) | |||
YG-1 | 0.90 ± 0.02 | 7.0 ± 0.3 | 11.3 ± 0.7 | 2.9 ± 0.2 | 8.1 ± 1.3 | 0.97 ± 0.03 | 12.5 ± 0.4 | −4.7 ± 0.7 | 5.1 ± 0.3 |
YG-2 | 0.99 ± 0.03 | 5.2 ± 0.1 | 11.0 ± 0.8 | 2.0 ± 0.1 | 5.2 ± 0.9 | 0.98 ± 0.02 | 8.6 ± 0.2 | −6.6 ± 0.7 | 3.3 ± 0.1 |
YG-3 | 0.94 ± 0.04 | 3.3 ± 0.3 | 11.5 ± 0.7 | 1.4 ± 0.2 | 3.7 ± 0.7 | 0.96 ± 0.02 | 6.0 ± 0.3 | −5.7 ± 1.1 | 2.5 ± 0.2 |
YG-4 | 1.03 ± 0.05 | 3.1 ± 0.2 | 12.8 ± 0.8 | 1.2 ± 0.1 | 3.7 ± 0.5 | 1.00 ± 0.06 | 5.2 ± 0.3 | −6.8 ± 1.0 | 1.9 ± 0.2 |
YG-5 | 0.98 ± 0.06 | 1.5 ± 0.04 | 11.1 ± 1.1 | 0.61 ± 0.04 | 1.4 ± 0.2 | 0.98 ± 0.09 | 2.8 ± 0.1 | −6.6 ± 1.0 | 1.1 ± 0.1 |
YG-6 | 1.03 ± 0.10 | 0.91 ± 0.02 | 12.7 ± 0.9 | 0.33 ± 0.02 | 0.83 ± 0.10 | 1.02 ± 0.11 | 2.0 ± 0.2 | −7.6 ± 0.7 | 0.73 ± 0.08 |
YG-7 | 0.99 ± 0.05 | 0.81 ± 0.02 | 12.0 ± 0.7 | 0.18 ± 0.01 | 0.39 ± 0.04 | 1.01 ± 0.11 | 2.4 ± 0.1 | −6.3 ± 0.6 | 0.55 ± 0.04 |
YG-8 | 0.99 ± 0.05 | 0.55 ± 0.01 | 12.6 ± 0.8 | 0.12 ± 0.01 | 0.25 ± 0.02 | 0.97 ± 0.05 | 2.1 ± 0.1 | −6.6 ± 0.7 | 0.45 ± 0.03 |
Step | IRSL50 | Post-IR IRSL150 |
---|---|---|
1 | Preheat at 180°C for 60 s | Preheat at 180°C for 60 s |
2 | IR stimulation at 50°C for 100 s | IR stimulation at 50°C for 100 s |
3 | Test dose | IR stimulation at 150°C for 100 s |
4 | Preheat at 180°C for 60 s | Test dose |
5 | IR stimulation at 50°C for 100 s | Preheat at 180°C for 60 s |
6 | IR stimulation at 185°C for 100 s | IR stimulation at 50°C for 100 s |
7 | Dose and return to step 1 | IR stimulation at 150°C for 100 s |
8 | IR stimulation at 185°C for 100 s | |
9 | Dose and return to step 1 |
Sample | Distance from shoreline (km) | Surface elevation (m T.P. T.P. (Tokyo Peil) is the standard datum for elevation measurements in Japan. | Depth (m) | Water content (%) | K (%) | Rb (ppm) | Th (ppm) | U (ppm) | Dose rate (Gy/ka) |
---|---|---|---|---|---|---|---|---|---|
YG-1 | 3.25 | +2.97 | 1.80–1.95 | 28 | 1.3 | 50 | 6.0 | 1.1 | 2.45 ± 0.14 |
YG-2 | 2.35 | +3.51 | 1.35–1.50 | 31 | 1.7 | 67 | 4.6 | 1.0 | 2.57 ± 0.15 |
YG-3 | 1.79 | +2.75 | 0.90–1.05 | 32 | 1.4 | 54 | 4.0 | 1.1 | 2.37 ± 0.14 |
YG-4 | 1.44 | +2.80 | 0.95–1.10 | 28 | 1.8 | 69 | 4.3 | 1.2 | 2.69 ± 0.15 |
YG-5 | 0.94 | +4.14 | 1.40–1.55 | 32 | 1.6 | 55 | 4.1 | 1.0 | 2.46 ± 0.14 |
YG-6 | 0.58 | +3.34 | 1.70–1.85 | 26 | 1.9 | 77 | 4.0 | 1.0 | 2.75 ± 0.15 |
YG-7 | 0.25 | +2.62 | 1.15–1.30 | 6 | 3.3 | 149 | 3.2 | 1.0 | 4.39 ± 0.23 |
YG-8 | 0.03 | +2.89 | 1.65–1.95 | 5 | 3.5 | 163 | 3.8 | 0.9 | 4.66 ± 0.25 |