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Table 1 Concentrations of major elements (average values of duplicate analyses), TC, TN, and TS in 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

MgO

Al 2 O 3

SiO 2

K 2 O

CaO

TiO 2

MnO

Fe 2 O 3

Carbon

Nitrogen

Sulfur

C/N

14 C age

δ 13 C

δ 15 Ν

(cm)

(wt%)

(wt%)

 

(years BP)

 

(‰ vs. PDB)

(‰ vs. Air)

0 to 2

1.0

3.0

10.5

46.6

3.4

2.8

0.91

0.17

7.5

1.3

0.00

0.3

-

1,350

40

−18.0

+6.6 (n = 2)

2 to 4

3.0

2.4

9.1

53.4

2.9

2.8

0.78

0.11

6.5

1.6

0.00

 

-

    

4 to 6

5.0

0.5

4.1

67.6

1.6

2.1

0.35

0.05

3.9

2.5

0.30

1.2

8.5

   

+4.3 (n = 2)

6 to 8

7.0

0.0

3.2

67.2

1.4

1.9

0.30

0.05

3.7

2.8

0.36

 

7.9

3,950

30

−21.6

+3.1

8 to 10

9.0

0.7

5.9

59.3

2.2

2.5

0.50

0.07

5.0

2.3

0.27

1.6

8.7

    

10 to 12

11.0

1.8

6.9

58.9

2.2

2.7

0.50

0.07

4.8

2.0

0.24

 

8.3

4,200

30

−20.8 (n = 2)

+4.9 (n = 2)

12 to 13

12.5

1.4

6.2

60.7

1.9

2.6

0.43

0.07

4.3

1.9

0.23

1.2

8.1

    

13 to 14

13.5

1.3

5.4

63.7

1.7

2.4

0.39

0.06

4.0

2.0

0.26

 

7.5

    

14 to 16

15.0

1.7

7.0

58.3

1.9

2.9

0.45

0.07

4.8

0.7

0.00

1.1

-

  

−19.3

+5.9

16 to 18

17.0

0.0

2.0

67.2

1.0

1.8

0.21

0.04

3.0

2.3

0.27

 

8.7

    

18 to 20

19.0

0.0

2.1

74.4

1.1

1.9

0.24

0.04

3.2

2.4

0.30

1.0

8.1

3,920

40

−23.6

+3.2

20 to 22

21.0

0.1

1.9

74.6

1.1

1.8

0.23

0.04

3.3

2.8

0.35

 

8.0

    

22 to 24

23.0

0.3

3.8

65.8

1.5

2.1

0.31

0.05

3.9

3.1

0.37

1.5

8.5

    

24 to 26

25.0

0.3

3.6

66.6

1.5

2.1

0.31

0.05

3.6

2.2

0.24

 

9.2

4,410

30

−20.5

+2.2

26 to 28

27.0

0.2

3.3

70.9

1.4

2.0

0.29

0.05

3.6

3.2

0.38

1.3

8.3

    

28 to 30

29.0

0.0

1.4

74.7

0.9

1.6

0.22

0.04

2.6

3.0

0.36

 

8.2

  

−21.0

+4.3

30 to 32

31.0

0.0

0.9

67.3

0.7

1.5

0.13

0.05

2.8

2.7

0.35

1.1

7.8

    

32 to 34

33.0

0.0

3.0

64.6

1.3

2.0

0.30

0.06

3.7

2.4

0.30

 

8.0

4,630

30

−21.0

+4.8

34 to 36

35.0

0.0

3.9

65.8

1.6

2.1

0.32

0.06

3.8

2.6

0.36

1.5

7.1

  

−20.9

+5.1

36 to 38

37.0

0.0

2.8

69.6

1.3

2.0

0.28

0.05

3.8

3.0

0.39

 

7.6

    

38 to 40

39.0

0.1

3.1

71.9

1.3

2.0

0.30

0.05

3.7

2.4

0.32

1.1

7.5

    

40 to 43

41.5

0.0

2.6

73.4

1.2

1.9

0.26

0.04

3.3

2.9

0.40

 

7.2

  

−20.4

+4.2 (n = 2)

43 to 46

44.5

0.0

2.7

60.8

1.2

1.9

0.23

0.04

2.8

2.6

0.36

1.3

7.1

    

46 to 49

47.5

0.6

4.4

65.6

1.7

2.1

0.37

0.06

3.6

3.5

0.43

 

8.0

4,540

40

  

49 to 52

50.5

1.0

6.1

62.6

2.0

2.3

0.46

0.06

4.0

2.7

0.31

1.0

8.8

  

−21.2

+5.8

52 to 55

53.5

1.1

6.8

59.0

2.2

2.5

0.51

0.07

4.2

2.3

0.28

 

8.1

    

55 to 58

56.5

2.6

8.3

55.2

2.6

2.7

0.64

0.08

4.6

1.9

0.22

0.8

8.7

    

58 to 61

59.5

1.8

8.1

55.6

2.6

2.7

0.62

0.08

4.5

2.4

0.24

 

9.9

  

−21.1

+5.7

61 to 64

62.5

0.2

3.3

72.0

1.3

1.9

0.27

0.05

2.9

2.8

0.36

0.9

7.9

    

64 to 67

65.5

0.0

1.3

76.4

0.9

1.6

0.17

0.04

2.8

3.1

0.43

 

7.3

    

67 to 70

68.5

0.0

1.5

76.4

0.9

1.7

0.18

0.04

2.8

3.0

0.40

1.1

7.6

  

−21.2

+5.4

70 to 75

72.5

0.0

0.7

79.0

0.7

1.5

0.14

0.03

2.1

3.8

0.50

 

7.7

5,220

40

  

75 to 80

77.5

0.0

0.5

78.5

0.6

1.5

0.12

0.03

2.0

2.8

0.34

0.7

8.4

    

80 to 85

82.5

0.0

0.4

80.9

0.6

1.4

0.10

0.03

1.7

3.3

0.48

 

6.9

  

−20.6

+4.9

85 to 90

87.5

0.0

0.0

83.2

0.4

1.4

0.07

0.02

1.4

3.1

0.38

0.6

8.2

    

90 to 95

92.5

0.0

0.3

82.1

0.5

1.4

0.09

0.02

1.6

2.9

0.35

 

8.3

5,520

90

−21.2

 

95 to 100

97.5

0.0

0.2

80.9

0.6

1.5

0.11

0.03

1.7

3.1

0.37

0.7

8.3

  

−21.8

+4.5

100 to 105

102.5

0.0

1.0

77.4

0.8

1.6

0.15

0.03

2.2

3.1

0.39

 

7.8

    

105 to 110

107.5

0.0

0.8

78.5

0.8

1.6

0.14

0.03

2.0

2.8

0.35

0.8

7.9

5,400

30

−20.9

 

110 to 115

112.5

0.0

0.3

79.4

0.7

1.6

0.12

0.03

2.0

3.2

0.40

 

8.0

    

115 to 120

117.5

0.0

0.4

80.6

0.6

1.5

0.11

0.03

1.7

3.0

0.40

0.8

7.6

  

−20.9

+4.2

120 to 125

122.5

0.0

0.6

80.7

0.6

1.4

0.11

0.02

1.6

3.3

0.44

 

7.5

    

125 to 130

127.5

0.0

0.3

81.7

0.5

1.4

0.10

0.02

1.4

3.1

0.42

0.7

7.4

5,350

40

−17.0

+2.4

130 to 135

132.5

0.0

1.7

75.3

0.9

1.7

0.18

0.04

2.3

2.6

0.32

 

8.2

    

135 to 140

137.5

0.0

1.7

76.0

0.9

1.7

0.18

0.03

2.3

2.7

0.34

0.9

7.9

    

140 to 145

142.5

0.0

1.0

79.1

0.7

1.6

0.13

0.03

1.9

2.8

0.38

 

7.3

    

145 to 150

147.5

0.0

1.2

77.7

0.9

1.8

0.17

0.04

2.4

2.4

0.31

0.8

7.8

    

150 to 156

153.0

0.0

0.6

79.8

0.7

1.6

0.12

0.03

1.8

2.7

0.33

 

8.3

6,010

70

−21.4 (n = 2)

+4.5

  1. Radiocarbon (14C age), carbon, and nitrogen isotopic compositions at corresponding depths are also shown.