Table 1.

Table 1. Interstitial data from selected samples from Site 997.

IW
sample Depth
(mbsf) Ammonium
(mM) ¹⁵N-NH₄⁺( Air)

164-997A-

3H-3
16.80
1.5
4.1

6H-2
43.80
4.1
4.1

12H-2
92.80
8.4
4.3

17H-5
144.70
13.2
4.8

21X-2
169.75
15.6

30X-1
233.60
17.5
3.6

37X-5
296.15
20.4
4.5

164-997B-

14X-2
493.56
22.2
4.9

29X-4
612.25
18.2
4.2

39X-3
687.65
10.6
3.9

IW sample	Depth (mbsf)	Ammonium (mM)	¹⁵N-NH₄⁺( Air)
164-997A-
3H-3	16.80	1.5	4.1
6H-2	43.80	4.1	4.1
12H-2	92.80	8.4	4.3
17H-5	144.70	13.2	4.8
21X-2	169.75	15.6
30X-1	233.60	17.5	3.6
37X-5	296.15	20.4	4.5
164-997B-
14X-2	493.56	22.2	4.9
29X-4	612.25	18.2	4.2
39X-3	687.65	10.6	3.9

Notes: IW = interstitial water. Ammonium concentrations are in millimolar (mM) units (from Paull, Matsumoto, Wallace, et al., 1996). Nitrogen isotopic data for pore-water ammonium are expressed in per mil units () relative to the nitrogen isotopic standard, Air.