Table 3.

Table 3. Noble gas composition of dissociated gas hydrate specimens from Leg 164 and appropriate standards.

Sample number* Gas sample ³⁶Ar (ppmv) F(⁴He) ± F(²²Ne) ± F(⁸⁴Kr) ± F(¹³²Xe) ± R/R_a ±

1
994C-31X-7(1)
0.444
23
1.4
0.91
0.02
1.21
0.02
2.0
0.1
0.18
0.01

2
996B-1H-1(1)
0.300
1.9
0.13
0.97
0.03
1.13
0.03
4.4
0.2
0.74
0.06

3
996B-1H-1(2)
1.038
2.0
0.13
0.84
0.02
1.33
0.03
4.1
0.2
0.42
0.08

4
996C-1H-1(1)
0.225
170
10
0.83
0.02
1.49
0.03
3.9
0.2
0.11
0.01

5
996C-1H-1(2)
1.195
315
19
0.93
0.02
0.99
0.20
1.3
0.1
0.15
0.01

6
996E-7H-CC(1)
0.218
350
21
0.48
0.02
2.58
0.05
7.4
0.4
0.75
0.01

7
997A-42X-3(1A)
0.452
1.5
0.11
0.73
0.02
1.90
0.04
17.8
1.0
1.01
0.14

8
997A-42X-3(1B)
0.893
3.7
0.23
0.94
0.24
1.02
0.02
3.4
0.2
0.30
0.03

Air
3.148
1.0

1.00

1.00

1.00

1.00

AS seawater 0°C

0.19

0.24

1.95

4.04

1.00

AS seawater 25°C

0.29

0.33

1.73

3.09

1.00

Sample number*	Gas sample	³⁶Ar (ppmv)	F(⁴He)	±	F(²²Ne)	±	F(⁸⁴Kr)	±	F(¹³²Xe)	±	R/R_a	±
1	994C-31X-7(1)	0.444	23	1.4	0.91	0.02	1.21	0.02	2.0	0.1	0.18	0.01
2	996B-1H-1(1)	0.300	1.9	0.13	0.97	0.03	1.13	0.03	4.4	0.2	0.74	0.06
3	996B-1H-1(2)	1.038	2.0	0.13	0.84	0.02	1.33	0.03	4.1	0.2	0.42	0.08
4	996C-1H-1(1)	0.225	170	10	0.83	0.02	1.49	0.03	3.9	0.2	0.11	0.01
5	996C-1H-1(2)	1.195	315	19	0.93	0.02	0.99	0.20	1.3	0.1	0.15	0.01
6	996E-7H-CC(1)	0.218	350	21	0.48	0.02	2.58	0.05	7.4	0.4	0.75	0.01
7	997A-42X-3(1A)	0.452	1.5	0.11	0.73	0.02	1.90	0.04	17.8	1.0	1.01	0.14
8	997A-42X-3(1B)	0.893	3.7	0.23	0.94	0.24	1.02	0.02	3.4	0.2	0.30	0.03
	Air	3.148	1.0		1.00		1.00		1.00		1.00
	AS seawater 0°C		0.19		0.24		1.95		4.04		1.00
	AS seawater 25°C		0.29		0.33		1.73		3.09		1.00

Notes: * = numbering scheme used in Table 2 and Table 3, and Figure 3, Figure 4, Figure 5. Concentration and fractionation values for air and air-saturated (AS) seawater are from Ozima and Podosek (1983).