Table 3. Methane concentration data for Holes 994A and 995B, and for piston core 11-8.
 
Core, section,
interval (cm)
Depth
(mbsf)
Methane
(µM)

164-994A-*



1H-1, 140-150

1.40

--

1H-2, 140-150

2.90

1

1H-3, 140-150

4.40

--

1H-4, 140-150

5.90

--

1H-5, 140-150

7.40

--

2H-1, 140-150

9.30

--

2H-2, 115-130

10.55

2

2H-2, 140-150

10.80

--

2H-3, 115-130

12.05

2

2H-3, 140-150

12.30

--

2H-4, 115-130

13.55

18

2H-4, 140-150

13.80

1

2H-5, 115-130

15.05

15

2H-5, 140-150

15.30

7

2H-6, 115-130

16.55

22

2H-6, 140-150

16.80

--

3H-1, 10-25

17.50

11

3H-1, 85-110

18.25

19

3H-1, 140-150

18.80

11

3H-2, 10-25

19.00

5

3H-2, 45-60

19.35

12

3H-2, 80-95

19.70

--

3H-2, 115-130

20.05

12

3H-2, 140-150

20.30

12

3H-3, 10-25

20.50

38

3H-3, 45-60

20.85

80

3H-3, 80-95

21.20

124

3H-3, 115-130

21.55

170

3H-3, 140-150

21.80

53

3H-4, 10-25

22.00

33

3H-4, 45-60

22.35

185

3H-4, 80-95

22.70

261

3H-4, 115-130

23.05

298

3H-4, 140-150

23.30

1

3H-5, 10-25

23.50

314

3H-5, 45-60

23.85

311

3H-5, 80-95

24.20

849

3H-5, 115-130

24.55

469

3H-5, 140-150

24.80

57

3H-6, 10-25

25.00

439

3H-6, 45-60

25.35

532

3H-6, 80-95

25.70

608

3H-6, 115-130

26.05

580

3H-6, 140-150

26.30

--

3H-7, 140-150

27.60

806

4H-2, 10-25

27.60

184

4H-2, 140-150

28.89

668

164-995B-

1H-3, 66-76

3.66

9

2H-1, 122-132

17.22

6

2H-3, 100-110

20.00

16

2H-3, 120-130

20.20

17

2H-4, 10-20

20.60

18

2H-4, 30-40

20.80

18

2H-4, 72-82

21.22

54

2H-4, 92-102

21.42

104

2H-4, 122-132

21.72

177

2H-5, 10-20

22.10

274

2H-5, 30-40

22.30

367

2H-5, 60-70

22.60

421

2H-5, 80-90

22.80

442

Piston core 11-8

54-60

0.57

1

60-70

0.65

--

133-139

1.36

1

233-239

2.36

>0

340-346

3.43

1

440-446

4.43

>0

540-546

5.45

>0

648-654

6.51

1

748-754

7.51

>0

848-854

8.51

>0

956-962

9.59

1

1052-1062

10.55

185

1156-1162

11.59

386

1262-1268

12.65

41

1362-1368

13.65

267

1462-1468

14.65

19

1475-1490

14.82

61

Notes: No methane gas hydrates are present at these depths. µM = micromoles per liter or micromolar. * = Paull, Matsumoto, Wallace, et al. (1996; shipboard determinations). -- = not measured. = average values from two samples (from subsamples measured onshore); Hoehler et al. (Chap. 8, this volume). = Borowski (1998; shipboard determinations).