Table T4. Concentrations of methane, ethane, ethylene, propane, and propylene in headspace gas, Hole 1252A.
Core, section, interval (cm)
Depth (mbsf)
C1 (ppmv)
C2 (ppmv)
C2= (ppmv)
C3 (ppmv)
C3= (ppmv)
C1/C2
204-1252A-






1H-1, 0-5 0.00 2




1H-1, 130-135 1.30 7




1H-3, 0-5 3.00 116




1H-4, 0-5 4.00 261




2H-2, 0-5 6.40 10,165




2H-3, 0-5 7.90 23,550




2H-4, 0-5 9.40 42,152 1.1


36,975
2H-5, 0-5 10.90 50,479 1.6


30,780
2H-5, 0-5 10.90 36,197 1.1

1.0 34,473
2H-6, 0-5 12.40 24,932 1.1


23,085
2H-7, 0-5 13.90 14,001



30,000
3H-3, 0-5 16.15 48,679 1.5


32,238
4H-2, 0-5 25.40 17,277 1.1


16,454
5H-3, 0-5 35.49 14,353 0.9


15,433
6H-3, 0-5 45.90 18,386 1.1


17,510
7H-3, 0-5 55.40 15,865 1.2


13,560
8H-2, 0-5 63.40 12,149 1.2


10,124
9H-3, 0-5 74.40 15,206 2.7
2.8
5,653
9H-6, 0-5 78.90 21,190 2.7
1.6
7,819
10H-3, 0-5 83.00 8,384 2.6


3,275
10H-6, 0-5 87.50 20,198 3.7


5,401
11H-3, 0-5 93.40 12,890 4.0 0.8
0.8 3,223
11H-6, 0-5 97.90 19,779 6.1


3,248
12H-3, 0-5 102.90 16,531 5.0
0.6
3,326
12H-6, 0-5 107.30 19,912 7.1 0.7

2,805
13H-3, 0-5 112.40 15,506 6.1


2,530
14H-3, 0-5 121.90 12,473 6.8


1,837
14H-6, 0-5 126.09 13,646 7.7


1,775
15H-3, 0-5 128.00 13,221 4.1


3,209
15H-6, 0-5 132.38 12,521 6.7


1,872
16H-3, 0-5 137.70 13291 5.3


2,489
16H-4, 0-5 139.20 11,151 7.2
2.7
1,553
17H-3, 0-5 147.40 2,041 1.3


1,607
17H-6, 0-5 151.80 11,161 8.8


1,264
18H-3, 0-5 157.10 7,973 5.6


1,434
18H-4, 0-5 158.60 5,311 6.0 0.7

888
19H-3, 0-5 166.80 7,231 5.6
2.4 2.1 1,294
19H-6, 0-5 171.30 6,643 8.1


816
20H-3, 0-5 176.50 4,497 4.6
3.3 2.8 978
20H-4, 0-5 178.00 7,264 6.7
1.5
1,079
21H-3, 0-5 186.10 3,168 4.9


651
21H-6, 0-5 190.56 8,290 10.3
2.8 1.0 802
22H-4, 0-5 197.20 7,342 8.7


842
23H-4, 0-5 205.98 5,736 8.8


650
24H-4, 0-5 215.70 3,966 7.2


549
25H-4, 0-5 225.40 12,775 25.8
1.0
496
26X-4, 0-5 235.00 11,397 24.1


473
27X-4, 0-5 244.70 14,892 36.9
1.7
403
28X-4, 0-5 254.34 14,095 28.5


495

Note: C1 = methane, C2 = ethane, C2= = ethylene, C3 = propane, C3= = propylene.