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Table 2 Radiocarbon ( 14 C) age data obtained with AMS for the organic carbon fractions from core Mw5S from L. Maruwan

From: Biogeochemistry and limnology in Antarctic subglacial weathering: molecular evidence of the linkage between subglacial silica input and primary producers in a perennially ice-covered lake

Depth

Mid-depth

Conventional radiocarbon age ( δ 13 C corrected)

1σ

Calendar age (2σ range)

Relative area under probability function

(cm)

(years BP)

±

(cal BP)

 

0 to 2

1.0

1,350

40

24 to 141

0.73

    

220 to 262

0.25

6 to 8

7.0

3,950

30

2,737 to 2,798

0.93

    

2,819 to 2,844

0.06

10 to 12

11.0

4,200

30

2,950 to 3,160

1.00

18 to 20

19.0

3,920

40

2,706 to 2,813

0.94

    

2,816 to 2,844

0.03

    

2,618 to 2,633

0.03

24 to 26

25.0

4,410

30

3,256 to 3,392

1.00

32 to 34

33.0

4,630

30

3,475 to 3,637

1.00

46 to 49

47.5

4,540

40

3,382 to 3,560

1.00

70 to 75

72.5

5,220

40

3,790 to 4,053

1.00

90 to 95

92.5

5,520

90

4,056 to 4,565

1.00

105 to 110

107.5

5,400

30

4,042 to 4,274

1.00

125 to 130

127.5

5,350

40

3,950 to 4,218

1.00

150 to 156

153.0

6,010

70

4,807 to 5,204

1.00

  1. Conventional radiocarbon dating based on organic carbon values (14Corg, years BP) was corrected for the marine reservoir effect (ΔR = 1,300 years for the marine stage sequence) using core-top data. Calendar age data were calculated using the calibration programs Calib Rev 6.0.1 (Stuiver and Reimer 1993; Stuiver et al. 1998), INTCAL09 and MARINE09 (e.g., Hughen et al. 2004; Reimer et al. 2004, 2009). See discussions of the biogeochemical recycling processes for relic carbon in the Antarctic region (e.g., Ingolfsson et al. 1998; Berkman et al. 1998) and the Soya Coast region (e.g., Miura et al. 2002).