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Table T3. Composition of interstitial pore water, Site U1395B.

Core,
section
Depth (mbsf) Alkalinity
(mM)
pH Cl
(mM)
± Salinity NH4
(mM)
Na
(mM)
± Mg
(mM)
± K
(mM)
± Ca
(mM)
± ΣS
(mM)
±
340-U1395B-
1H-3 4.40 4.50 3.6 7.7 554.1   36 0.01 470.5 2.9 54.0 0.6 10.8 0.2 10.4 0.1 28.4 0.3
2H-3 10.30 10.40 3.4 7.5 558.7   37 0.02 481.6 10.3 54.0 0.1 11.3 0.3 10.2 0.1 28.0 0.4
3H-5 22.70 22.80 5.6 7.4 555.3   37 0.67 485.6 4.5 52.9 0.4 10.7 0.2 7.8 0.0 24.3 0.6
4H-3 29.32 29.42 7.5 8.0 559.2   36 0.84 485.3 3.7 52.0 0.4 10.3 0.1 7.7 0.1 23.7 0.2
4H-6 33.88 33.98 6.0 7.5 568.3   37 0.89 488.1 3.3 52.3 0.3 10.2 0.2 8.4 0.1 24.0 0.3
5H-3 38.80 38.90 6.4 9.7 567.7   37 0.96 482.5 3.8 50.6 0.4 10.4 0.2 8.9 0.1 23.9 0.3
6H-4 49.72 49.82 6.4 8.9 571.9   37 1.03 482.6 2.9 50.8 0.3 10.0 0.1 8.9 0.1 24.1 0.4
6H-6 52.85 52.95 7.0 7.7 571.4   37 1.05 482.4 2.5 51.0 0.3 9.8 0.1 8.9 0.1 24.2 0.3
7H-4 59.31 59.41 6.1 8.0 568.8   37 1.05 487.3 1.4 51.7 0.1 9.7 0.1 8.9 0.0 24.3 0.0
9H-1 72.60 72.70 5.4 7.4 571.2   37 1.09 485.2 3.2 51.6 0.5 9.1 0.1 9.2 0.1 24.9 0.3
10H-2 82.30 82.40 5.6 7.5 570.2   37 1.10 498.3 1.5 52.6 0.3 8.9 0.0 9.8 0.0 26.1 0.2
10H-5 86.81 86.91 5.2 7.2 568.5   37 1.11 485.5 4.4 51.4 0.4 8.5 0.2 9.3 0.1 25.3 0.2
11H-3 92.10 92.20 5.5 7.5 571.5   37 1.11 487.6 2.6 51.3 0.3 8.5 0.1 9.6 0.1 25.2 0.0
12H-3 101.15 101.25 5.4 7.4 568.5   37 1.15 488.9 2.9 51.3 0.5 8.1 0.2 9.8 0.1 25.3 0.2
12H-6 105.70 105.80 5.2 7.3 568.2 2.6 37 1.15 486.5 1.7 50.9 0.3 8.0 0.2 9.8 0.1 25.1 0.2
13H-4 112.02 112.12 5.1 7.3 568.9   36 1.18 497.3 11.6 50.5 0.9 7.9 0.1 10.2 0.2 25.0 0.3
14H-3 117.30 117.40 5.3 7.7 571.5   37 1.21 502.7 13.8 50.7 0.9 7.9 0.2 10.7 0.2 25.6 0.4
24X-1 185.50 185.60 5.5 7.2 567.5   37 1.21 503.7 13.7 44.0 0.7 6.9 0.0 14.1 0.2 24.6 0.2
25X-1 195.10 195.20 5.4 7.1 570.4 0.4 37 1.14 487.3 2.8 42.5 0.9 6.4 0.1 14.3 0.2 23.9 0.7

One Cl value of 505.7 mM for Section 340-U1395B-1H-3 was not used because part of the sample was dropped. One value for Section 10H-2 was not used for calculation of the average, as this sample was atypically high (Na = 569 mM, Mg = 59.6 mM, K = 10.1 mM, Ca = 11.1 mM, and S = 28.7 mM). Uncertainties for Cl represent ±1σ based on duplicate analyses. Shaded samples represent average values for Na, Mg, K, Ca, and ΣS (total sulfur) from duplicate analyses from separate runs. Shaded pH values are particularly high and are considered suspect. Samples in italics represent averages from within-run duplicates.

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