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Table T3. Composition of interstitial pore water, Site U1400.

Core,
section		 Depth (mbsf) Alkalinity
(mM)		 pH Cl
(mM)		 ± Salinity NH4
(mM)		 Na
(mM)		 ± Mg
(mM)		 ± K
(mM)		 ± Ca
(mM)		 ± ΣS
(mM)		 ±
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340-U1400B-
7H-4 31.24 31.34 3.40 7.57 561.9 1.4 37 0.02 471 6 52.8 0.3 11.0 0.1 10.47 0.10 27.9 0.1
8H-5 42.40 42.50 3.48 7.53 560.0 1.8 37 0.02 468 3 52.5 0.5 10.8 0.1 10.42 0.09 27.9 0.4
9H-1 45.90 46.00 3.64 7.46 559.9 3.8 37 0.03 473 3 52.7 0.5 10.8 0.2 10.67 0.08 28.0 0.3
10H-3 52.91 53.01 3.92 7.38 559.6 3.5 37 0.10 474 3 52.7 0.4 10.9 0.2 10.79 0.05 27.9 0.2
10H-6 57.42 57.52 4.20 7.38 559.3 0.0 37 0.21 470 4 51.8 0.6 10.6 0.2 10.49 0.10 27.4 0.3
11H-4 63.92 64.02 4.32 7.47 562.9 1.5 37 0.24 473 3 52.2 0.7 10.8 0.1 10.46 0.13 27.2 0.3
12H-2 70.08 70.18 4.09 7.52 560.9 2.2 37 0.13 473 3 52.7 0.5 10.7 0.2 10.75 0.07 27.9 0.3
13H-5 81.40 81.50 5.01 7.56 564.9 2.4 37 0.48 476 3 52.4 0.4 10.2 0.2 9.98 0.09 26.7 0.2
14H-3 87.85 87.95 5.56 7.41 567.6 4.1 37 0.59 478 3 52.1 0.4 9.9 0.1 9.32 0.06 25.6 0.2
15H-4 98.80 98.90 5.68 7.41 569.0 1.2 37 0.60 479 1 52.4 0.4 9.6 0.1 9.45 0.05 25.1 0.3
17H-4 111.53 111.63 5.77 7.45 568.5 3.3 37 0.64 477 2 52.7 0.4 9.6 0.2 9.75 0.05 25.5 0.2
18H-4 121.00 121.10 5.77 7.45 565.4 4.5 38 0.65 479 1 52.7 0.4 9.3 0.3 9.88 0.05 25.7 0.3
19H-2 127.52 127.62 5.80 7.49 571.3   37 0.62 478 2 53.8 0.4 9.1 0.2 9.97 0.05 25.7 0.4
20H-3 133.21 133.31 5.85 7.45 572.2   37 0.65 477 0 52.8 0.4 9.2 0.1 9.85 0.04 25.4 0.0
21H-5 143.82 143.92 5.85 7.58 570.9 1.3 37 0.68 476 2 52.7 0.4 8.9 0.3 9.73 0.11 25.5 0.3
22H-4 151.83 151.93 5.93 7.49 569.8   37 0.69 478 3 52.6 0.4 9.1 0.2 9.65 0.08 25.3 0.2
23H-4 161.35 161.45 5.81 7.46 568.2 0.3 37 0.68 476 2 52.4 0.4 8.9 0.1 9.71 0.06 25.1 0.2
24H-4 170.88 170.98 5.86 7.43 570.3   37 0.66 477 3 53.0 0.4 8.7 0.0 9.92 0.07 25.2 0.2
25H-4 180.34 180.44 5.51 7.39 570.5   37 0.61 474 3 52.8 0.4 8.4 0.2 9.98 0.07 25.0 0.3
26H-4 189.78 189.88 5.90 7.47 572.9   37 0.67 477 2 52.4 0.5 9.0 0.2 10.19 0.06 25.7 0.3
27H-5 200.79 200.89     569.2   38 0.68 475 3 52.2 0.5 9.2 0.1 10.15 0.09 25.3 0.3
28H-3 207.30 207.40 5.96 7.39 568.8   37 0.66 480 3 52.9 0.5 9.3 0.3 10.22 0.08 25.4 0.3
340-U1400C-
27X-4 231.20 231.30 5.86 7.81 570.8   38 0.62 473 4 52.4 0.5 8.9 0.2 10.60 0.10 25.9 0.3
29X-2 247.40 247.50 6.05 7.48 570.8   38 0.64 475 4 52.8 0.4 8.8 0.1 10.46 0.09 25.4 0.2
30X-2 257.00 257.10 6.22 7.39 572.2   38 0.69 478 2 52.4 0.4 9.0 0.1 10.38 0.08 25.1 0.3
31X-3 268.10 268.20 6.52 7.42 569.7   38 0.70 475 4 51.9 0.4 8.8 0.3 10.36 0.09 24.6 0.0
32X-2 276.20 276.30 6.82 7.39 570.3   37 0.73 476 3 51.6 0.4 8.8 0.2 10.29 0.05 24.1 0.3
33X-2 285.80 285.90 6.61 7.28 570.6   37 0.72 476 5 51.6 0.7 8.4 0.1 10.25 0.12 23.3 0.3
35X-4 298.40 298.50 6.38 7.29 568.7   37 0.70 473 2 51.9 0.5 8.1 0.2 10.30 0.05 23.9 0.3
36X-3 306.50 306.60 6.48 7.33 569.8   37 0.73 474 2 51.4 0.4 8.3 0.2 10.25 0.05 23.6 0.3
37X-1 313.12 313.22 6.72 7.36 567.5 3.2 37 0.74 475 2 51.7 0.4 8.4 0.2 10.46 0.07 23.7 0.4
38X-5 328.30 328.40 6.88 7.37 569.2 3.3 38 0.74 475 0 51.4 0.1 8.4 0.1 10.68 0.00 23.9 0.0
39X-5 337.71 337.81 6.75 7.46 568.2   38 0.73 477 2 52.0 0.5 8.5 0.2 10.95 0.06 24.7 0.2
40X-1 341.50 341.60 6.15 7.42 568.2   38 0.72 476 4 52.1 0.7 8.2 0.1 10.78 0.10 24.7 0.3
41X-1 351.10 351.20 6.06 7.39 566.0   37 0.61 472 3 52.5 0.5 7.4 0.0 10.90 0.15 23.7 0.1
42X-2 362.20 362.30 6.54 7.44 570.1   37 0.68 478 6 51.7 0.6 8.2 0.1 11.00 0.17 23.5 0.0
44X-1 379.75 379.85 6.40 7.34 570.4   37 0.68 476 5 50.8 0.5 8.0 0.0 11.56 0.20 22.9 0.2
45X-3 392.45 392.55 6.04 7.35 568.6   37 0.68 477 4 50.6 0.6 8.0 0.0 12.82 0.23 23.3 0.3
49X-1 427.48 427.58 4.76 7.25 560.2   37 0.57 465 5 47.8 0.9 6.7 0.0 14.78 0.39 18.1 0.2

Uncertainties represent ±1σ based on repeat analyses for Cl. Shaded samples represent average values for Na, Mg, K, Ca, and ΣS (total sulfur) from duplicate analyses from separate runs. Samples in italics represent averages from within-run duplicates.

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