Table T1.

Table T1. Characteristics of sediment samples taken at Site 1036.

Hole, core,
section, interval
(cm) Depth
(mbsf) T
(°C) Total PLFAs* (pmol/gdw) Total VLCFAs (pmol/gdw) PLFA biomass** (log cells/cm³) Direct counts (log cells/cm³) Cl
(mM) pH SO₄(mM) NH₄(µM) Ca
(mM) Mg (mM)

1036A-2H-1, 140-150
10.9
130
1.91
0.36
4.83
5.28
562
7.10
27.3
51
12.6
54.5

1036B-2H-1, 140-150
10.1
60
3.87
1.94
5.24
5.93
590
7.52
29.4
147
23.2
47.4

1036B-2H-5, 140-150
16.1
100
3.90
3.77
5.36
BD
573
7.09
19.3
238
31.8
30.9

1036C-2H-5, 130-140
13.8
64
6.18
1.55
5.37
6.18
561
7.56
27.6
250
15.9
54.2

1036C-3H-5, 140-150
23.3
93
4.34
4.11
5.40
BD
566
7.04
27.9
395
21.1
49.7

1036C-4H-5, 140-150
32.8
118
0.40
0.04
4.12
BD
563
6.70
12.4
560
28.3
25.5

Hole, core, section, interval (cm)	Depth (mbsf)	T (°C)	Total PLFAs* (pmol/gdw)	Total VLCFAs (pmol/gdw)	PLFA biomass** (log cells/cm³)	Direct counts (log cells/cm³)	Cl (mM)	pH	SO₄(mM)	NH₄(µM)	Ca (mM)	Mg (mM)
1036A-2H-1, 140-150	10.9	130	1.91	0.36	4.83	5.28	562	7.10	27.3	51	12.6	54.5
1036B-2H-1, 140-150	10.1	60	3.87	1.94	5.24	5.93	590	7.52	29.4	147	23.2	47.4
1036B-2H-5, 140-150	16.1	100	3.90	3.77	5.36	BD	573	7.09	19.3	238	31.8	30.9
1036C-2H-5, 130-140	13.8	64	6.18	1.55	5.37	6.18	561	7.56	27.6	250	15.9	54.2
1036C-3H-5, 140-150	23.3	93	4.34	4.11	5.40	BD	566	7.04	27.9	395	21.1	49.7
1036C-4H-5, 140-150	32.8	118	0.40	0.04	4.12	BD	563	6.70	12.4	560	28.3	25.5

Notes: gdw = gram dry weight; PLFA = phospholipid fatty acids; VLCFA = very long-chain fatty acids; BD = below detection; temperatures for samples at Hole 1036C are interpolated from temperature measurements (Shipboard Scientific Party, 1998), whereas temperatures for samples from Holes 1036A and 1036B are calculated from the estimated thermal gradients of 12°C/m and 6°C/m (Shipboard Scientific Party, 1998), respectively. * = excluding VLCFAs; ** = as calculated in text from PLFAs including VLCFAs; chemistry data are from Shipboard Scientific Party (1998); for reference, seawater values are 557 mM Cl, 28 mM SO₄, 0 mM NH₄, 10.6 mM Ca, and 54 mM Mg.