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Swiss Journal of Geosciences

Table 3 IRSL dating of loess-type soils of Mont Sujet

From: The Twannberg iron meteorite strewn field in the Swiss Jura mountains: insights for Quaternary environmental conditions

Sample (aliquots)

Signal

Dose recovery ratio1

Residuals1

(Gy)

CAM2 uncorrected De (Gy)

OD2 (%)

Fading4 g2days (%/decade)

CAM fading-corrected age (ka)

MS-01 (6)

IR50

0.93 ± 0.02

0.8

12.8 ± 1.0

6.6

2.5 ± 0.3

3.5 ± 0.4

pIR225

1.10 ± 0.02

4.9

32.9 ± 0.8

4.4

0.7 ± 0.3

7.1 ± 0.5

MS-02 (7)

IR50

0.93 ± 0.05

0.6

17.9 ± 0.3

0.1

2.4 ± 0.3

5.0 ± 0.3

pIR225

0.99 ± 0.01

3.6

40.7 ± 1.2

7.3

0.6 ± 0.3

9.2 ± 0.7

MS-03 (8)

IR50

1.07 ± 0.2

0.9

43.7 ± 0.9

4.5

2.6 ± 0.2

12.3 ± 0.8

pIR225

1.19 ± 0.04

8.0

69.4 ± 2.2

7.9

0.8 ± 0.2

15.1 ± 1.0

MS-04 (8)

IR50

0.95 ± 0.02

0.9

39.3 ± 0.7

3.3

2.5 ± 0.2

10.9 ± 0.7

pIR225

1.03 ± 0.01

5.1

58.0 ± 1.4

5.2

0.8 ± 0.2

13.0 ± 0.8

MS-05 (7)

IR50

0.94 ± 0.01

0.8

18.6 ± 0.6

6.9

2.1 ± 0.3

4.9 ± 0.4

pIR225

1.12 ± 0.02

5.3

36.5 ± 1.2

7.3

0.8 ± 0.3

7.7 ± 0.6

  1. IRSL dating of the loess-type soils of Mont Sujet on fine-grain small-aliquots, using feldspar infra-red luminescence at 50 °C (IR50) and post-infra-red infra-red luminescence at 225 °C (pIR225) signals. Analytical details and measurement protocols are given in the main text
  2. 1Dose recovery ratios have been calulated for each individual sample and using a given dose of 30 Gy for 5 aliquots. Residuals have been estimated for 4 aliquots per sample and are substracted to De for age determination
  3. 2De = Equivalent doses (non-corrected for residuals), CAM Central Age Model, OD overdispersion of De distribution (Galbraith et al., 1999)
  4. 3Fading measurements have been performed on all aliquots per sample to evaluate the variability in fading rates for IR50 and pIR225 signals
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