Table T16. Interstitial water chemistry from shipboard measurements of small-volume samples taken across selected porcellanite intervals in Holes 1094A and 1094D.
| Core,
section, interval (cm) |
Depth (mbsf) | pH | Alkalinity (mM) |
Cl (mM) |
SO4 (mM) |
Mg (mM) |
Ca (mM) |
K (mM) |
|---|---|---|---|---|---|---|---|---|
| 177-1094A- | ||||||||
| 8H-4, 10-15 | 66.22 | 8.09 | 5.225 | 565 | 30.2 | 52.82 | 9.0 | 10.96 |
| 8H-4, 60-65 | 66.72 | 8.04 | 5.356 | 566 | 30.0 | 52.39 | 8.9 | 11.40 |
| 8H-4, 87-92 | 67.00 | 8.05 | 5.376 | 567 | 28.6 | 52.65 | 9.1 | 11.45 |
| 8H-5, 0-5 | 67.62 | 8.05 | 5.061 | 564 | 28.7 | 52.37 | 9.2 | 10.91 |
| 8H-5, 22-27 | 67.84 | 8.00 | 5.338 | 563 | 29.7 | 52.55 | 9.5 | 10.45 |
| 8H-5, 52-57 | 68.14 | 8.03 | 4.961 | 564 | 31.2 | 52.57 | 9.4 | 10.33 |
| 8H-5, 57-62 | 68.20 | 8.13 | 5.237 | 564 | 29.5 | 52.27 | 9.7 | 10.75 |
| 8H-5, 62-67 | 68.24 | 7.91 | 5.225 | 566 | 29.9 | 52.35 | 9.3 | 10.73 |
| 8H-5, 73-78 | 68.36 | 7.92 | 5.370 | 567 | 30.9 | 53.12 | 9.8 | 10.76 |
| 8H-5, 88-93 | 68.50 | 8.16 | 5.249 | 571 | 28.8 | 52.71 | 9.6 | 10.87 |
| 8H-5, 113-118 | 68.76 | 8.15 | 5.345 | 571 | 28.4 | 52.12 | 10.1 | 11.16 |
| 8H-5, 134-139 | 68.96 | 8.05 | 5.296 | -- | 29.4 | 52.07 | 10.1 | 12.34 |
| 8H-6, 10-15 | 69.23 | 8.08 | 5.246 | -- | 28.8 | 51.23 | 9.6 | 13.14 |
| 12H-3, 55-60 | 103.18 | 7.82 | 5.080 | -- | 29.1 | 53.34 | 9.6 | 11.65 |
| 12H-4, 19-24 | 104.32 | 8.00 | 5.080 | -- | 27.1 | 53.94 | 9.4 | 10.63 |
| 12H-4, 43-48 | 104.56 | 7.90 | 4.926 | -- | 27.5 | 52.72 | 9.0 | 10.61 |
| 12H-4, 55-60 | 104.68 | 8.15 | 5.333 | -- | 29.5 | 54.62 | 9.1 | 11.09 |
| 12H-4, 68-73 | 104.80 | 7.94 | 4.691 | -- | 27.6 | 53.75 | 9.1 | 11.10 |
| 12H-4, 82-87 | 104.94 | 7.82 | 5.166 | -- | 30.8 | 52.59 | 8.3 | 11.58 |
| 12H-4, 105-110 | 105.18 | 7.62 | 5.324 | -- | 27.1 | 51.07 | 8.5 | 13.01 |
| 12H-5, 55-60 | 106.18 | 7.99 | 5.320 | -- | 27.1 | 50.20 | 8.0 | 13.50 |
| 177-1094D- | ||||||||
| 6H-1, 5-10 | 66.68 | -- | -- | 564 | 29.3 | 51.98 | 9.3 | 11.06 |
| 6H-1, 40-45 | 67.03 | -- | -- | 571 | 29.6 | 52.82 | 9.7 | 11.33 |
| 6H-1, 95-100 | 67.58 | -- | -- | 564 | 28.5 | 52.30 | 9.8 | 11.28 |
| 6H-1, 125-130 | 67.88 | -- | -- | 564 | 27.6 | 54.10 | 9.9 | 11.17 |
| 6H-1, 144-149 | 68.06 | -- | -- | 562 | 27.8 | 53.87 | 10.2 | 10.43 |
| 6H-2, 3-8 | 68.16 | -- | -- | 564 | 28.3 | 52.13 | 9.6 | 10.82 |
| 6H-2, 11-16 | 68.24 | -- | -- | 564 | 27.8 | 53.17 | 10.1 | 10.80 |
| 6H-2, 21-26 | 68.34 | -- | -- | 570 | 27.8 | 52.59 | 9.7 | 11.01 |
| 6H-2, 48-53 | 68.60 | -- | -- | 568 | 27.8 | 51.80 | 9.8 | 10.97 |
| 6H-2, 80-85 | 68.92 | -- | -- | 566 | 27.3 | 52.06 | 10.2 | 11.13 |
| 6H-2, 130-135 | 69.42 | -- | -- | 566 | 28.0 | 51.21 | 10.3 | 12.62 |
| 6H-3, 40-45 | 69.92 | -- | -- | 566 | 27.9 | 50.73 | 9.9 | 13.93 |
| 6H-3, 140-145 | 70.92 | -- | -- | 569 | 27.3 | 50.75 | 9.7 | 14.47 |
| 6H-4, 120-125 | 72.22 | -- | -- | 568 | 27.3 | 50.67 | 9.7 | 14.26 |
| 6H-5, 140-145 | 73.92 | -- | -- | 569 | 28.5 | 52.36 | 9.8 | 13.40 |
Note: Methods are identical to those used for standard interstitial water samples (see Table T15, p. 67).