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Table T3. Composition of interstitial pore water, Hole U1399B.

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-U1399B-
1H-2 2.90 3.00 4.17 7.99 556.8   37 0.02 467 22 53.0 3.3 10.7 0.5 10.58 0.60 28.4 2.2
2H-3 10.10 10.20 3.03 7.38 557.3   37 0.02 472 3 52.8 0.5 11.1 0.2 10.35 0.07 28.2 0.2
3H-3 19.62 19.72 4.27 7.35 565.8   37 0.22 473 3 52.2 0.4 10.8 0.2 9.56 0.05 26.7 0.3
3H-5 22.60 22.70 5.08 7.72 564.4   37 0.31                    
4H-2 27.60 27.70 5.91 7.54 562.7   37 0.45 477 1 52.6 0.4 10.2 0.2 8.21 0.05 24.1 0.2
4H-4 30.60 30.70 6.80 8.00 567.2   37 0.52 477 2 52.3 0.4 10.2 0.1 7.79 0.06 23.5 0.2
5H-3 38.60 38.70 7.18 7.55 569.0   37 0.65 476 4 52.0 0.6 10.6 0.2 6.89 0.07 21.9 0.2
5H-5 41.60 41.70 7.56 7.51 565.2   37 0.69 479 2 51.6 0.4 10.7 0.1 6.54 0.05 21.5 0.3
6H-2 46.50 46.60 8.07 7.58 567.3   37 0.72 475 4 50.9 0.4 10.1 0.2 5.87 0.06 20.2 0.2
6H-4 49.45 49.55 8.28 7.55 567.1   37 0.76 477 1 50.9 0.6 10.4 0.0 5.76 0.03 19.4 0.3
8H-1 64.12 64.22 9.35 7.68 568.8   37 0.83 481 3 50.9 0.5 10.0 0.1 5.20 0.05 17.8 0.2
8H-3 67.07 67.17 9.38 7.63 568.3 2.4 37 0.85 478 5 50.7 0.6 10.0 0.4 4.88 0.07 16.9 0.3
9H-3 76.32 76.42 9.62 7.59 567.0   37 0.86 477 2 50.2 0.4 9.8 0.2 4.44 0.06 15.5 0.3
12H-1 95.72 95.82 9.69 7.61 568.6   37 0.89 482 2 49.7 0.4 9.8 0.1 4.18 0.06 14.0 0.3
13H-3 107.10 107.20 10.27 7.68 569.2   37 0.93 478 1 49.4 0.3 9.8 0.2 4.24 0.05 13.3 0.2
15H-5 122.13 122.24 10.67 7.63 566.2   37 0.95 482 1 48.6 0.6 9.4 0.2 4.24 0.05 12.1 0.2
18H-2 131.83 131.93 11.48 7.61 574.4   37 1.01 485 6 48.3 0.1 9.4 0.0 4.41 0.02 10.8 0.2
24H-1 160.70 160.80 11.99 7.65 575.1   36 1.10 482 6 47.0 0.0 9.1 0.0 3.71 0.03 7.9 0.0
25H-1 167.80 167.90 11.45 7.59 576.9   36 1.04 484 7 47.0 0.2 8.8 0.0 3.42 0.03 7.2 0.1

Uncertainties for Cl represent ±1σ based on repeat analyses. 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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