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).