Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
The results of the OSL dating using quartz and IRSL dating using K-feldspar_ In the results of the IRSL dating, the upper line is the results by using pIR50IR290, and the lower line is the results using the MET pIRIR procedure_
| Sample name | Depth (m) | water Content (%) | K (%) | U (ppm) | Th (ppm) | OSL (Quartz) | IRSL (K-feldspar) | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Dose rate (Gy/ka) | De (Gy) | Age (ka) | Dose rate (Gy/ka) | De (Gy) | Age (ka) | ||||||
| ZZGD-45 | 0.45 | 10.0 | 1.63±0.05 | 4.92±0.14 | 6.76±0.22 | 3.26±0.25 | 112.32±9.76 | 34.5±4.0 | 3.79±0.26 | 216.22±8.98 | 56.9±4.6 |
| ZZGD-120 | 1.20 | 10. 0 | 1.62±0.05 | 3.46±0.11 | 6.66±0.21 | 2.80±0.22 | 138.97±8.94 | 49.5±5.0 | 3.33±0.23 | 210.94±11.07 | 63.3±5.5 |
| ZZGD-165 | 1.65 | 10.0 | 1.63±0.05 | 3.42±0.11 | 8.28±0.25 | 2.89±0.23 | 135.36±3.84 | 46.7±3.9 | 3.42±0.24 | 213.69±5.01 | 62.3±4.5 |
| ZZGD-195 | 1.95 | 10. 0 | 1.77±0.06 | 2.05±0.09 | 7.03±0.22 | 2.63±0.21 | 139.84±9.90 | 53.1±5.6 | 3.16±0.21 | 229.93±11.99 | 72.7±6.2 |
| ZZGD-290 | 2.90 | 10.0 | 1.83±0.06 | 2.03±0.08 | 8.03±0.24 | 2.73±0.21 | 170.91±12.94 | 62.7±6.8 | 3.25±0.22 | 245.09±16.54 | 75.34±7.3 |
| ZZGD-300 | 3.00 | 10.0 | 1.79±0.06 | 3.11±0.11 | 7.50±0.23 | 2.91±0.23 | 190.86±7.63 | 65.46±5.8 | 3.42±0.23 | 261.41±12.55 | 76.5±6.4 |
| ZZGD-365 | 3.65 | 10. 0 | 1.76±0.06 | 2.03±0.09 | 6.95±0.22 | 2.60±0.20 | 215.68±12.63 | 82.9±8.2 | 3.10±0.21 | 250.23±4.99 | 80.6±5.7 |
The OSL, pIRIR(50,290) and MET pIRIR dating protocols_
| Step | OSL protocol (Wintle and Murray, 2006) | pIRIR(50,290) protocol (Thiel et al., 2011) | MET-pIRIR protocol (Li et al., 2014) |
|---|---|---|---|
| 1 | Give regenerative dose, Dia | Give regenerative dose, Dia | Give regenerative dose, Dia |
| 2 | Preheat at 240°C for 10 s | Preheat at 320°C for 60 s | Preheat at 320°C for 60 s |
| 3 | OSL, 80 s at 125°C | IRSL, 200 s at 50°C | IRSL, 200 s at 50°C |
| 4 | Give test dose, Dt | IRIR, 200 s at 290°C | IRIR, 200 s at 100°C |
| 5 | Preheat at 220°C for 0 s | Give test dose, Dt | IRIR, 200 s at 150°C |
| 6 | OSL, 80 s at 125°C | Preheat at 320°C for 60 s | IRIR, 200 s at 200°C |
| 7 | OSL, 40 s bleaching at 280°C | IRSL, 200 s at 50°C | IRIR, 200 s at 250°C |
| 8 | Return to step 1 | IRIR, 200 s at 290°C | IRIR, 200 s at 300°C |
| 9 | IRSL, 100 s bleaching at 325°C | Give test dose, Dt | |
| 10 | Return to step 1 | Preheat at 320°C for 60 s | |
| 11 | IRSL, 200 s at 50°C | ||
| 12 | IRIR, 200 s at 100°C | ||
| 13 | IRIR, 200 s at 150°C | ||
| 14 | IRIR, 200 s at 200°C | ||
| 15 | IRIR, 200 s at 250°C | ||
| 16 | IRIR, 200 s at 300°C | ||
| 17 | IRSL, 100 s bleaching at 325°C | ||
| 18 | Return to step 1 |