Table 10. Interstitial water composition for Hole 1081A.
Core, section,
interval (cm)
Depth
(mbsf)
pH
Alkalinity
(mM)
Salinity
Cl– (titr)
(mM)
Cl– (IC)
(mM)
SO42–
(mM)
Na+
(mM)
Mg2+ (mM)
Ca2+
(mM)
K+
(mM)
H4SiO4
(µM)
NH4+
(µM)
PO43–
(µM)
Sr2+
(µM)
175-1081A-
2H-1, 140-150 2.40 7.56 4.190 35.0 551 550 26.54 471 52.33 10.47 11.15 514 442 15.7 91
2H-3, 140-150 5.40 7.15 5.180 35.0 552 551 26.04 475 51.91 10.07 11.06 594 713 13.4 90
3H-2, 130-140 13.30 7.77 7.830 34.5 552 550 24.05 478 50.64 8.52 11.78 550 1,266 29.4 91
4H-3, 130-140 24.30 7.16 10.670 34.5 555 554 18.84 479 49.75 6.55 11.75 624 1,960 24.8 88
5H-3, 130-140 33.80 7.25 17.690 34.0 559 557 8.53 481 46.24 3.94 11.90 666 2,912 33.9 72
6H-3, 130-140 43.30 7.96 22.890 33.5 564 565 2.65 487 43.54 3.42 11.40 832 3,189 30.5 68
7H-3, 130-140 52.80 8.01 22.630 33.5 566 565 1.51 488 42.46 3.61 11.49 899 3,421 25.9 76
8H-2, 130-140 62.30 8.04 25.380 33.5 566 565 0.17 490 41.36 3.69 11.66 956 3,509 28.2 99
9H-2, 130-140 71.80 7.99 25.430 33.5 568 568 0.00 495 39.53 3.74 11.44 967 3,945 23.7 120
10H-4, 130-140 81.30 7.91 23.530 33.0 562 561 0.45 495 35.47 4.06 11.74 948 4,309 20.2 124
11H-3, 130-140 90.80 7.79 21.040 32.5 558 561 0.14 496 31.89 4.00 11.55 1038 5,095 13.4 130
12H-3, 130-140 100.30 6.56 18.200 32.5 557 555 0.00 496 30.32 3.25 11.99 1074 6,070
133
15H-3, 144-154 128.90 7.24 22.520 32.5 556 556 0.04 501 28.67 4.64 11.67 1033 8,049 20.2 153
18H-3, 135-145 150.40 7.19 27.140 32.5 559 558 0.00 509 27.84 4.99 11.75 984 9,126 25.9 164
21X-3, 140-150 178.20 7.12 27.730 32.5 557 556 0.46 508 27.89 5.27 11.40 944 10,042 23.0 177
24X-3, 140-150 207.20 7.25 30.380 33.0 558 556 0.11 513 26.62 5.23 12.00 898 11,323 9.0 192
27X-3, 130-140 235.80 7.21 28.770 33.0 558 561 0.00 515 25.39 4.88 11.42 815 11,279 7.0 210
30X-3, 135-150 264.80 7.39 27.070 33.0 561 562 0.10 516 25.09 5.57 11.14 586 11,556 3.0 222
33X-3, 135-150 293.70 6.91 25.140 33.5 568 569 0.06 524 23.31 5.51 11.40 920 10,784 3.0 234
36X-4, 135-150 323.00 7.16 25.940 33.5 573 573 0.00 529 23.50 6.80 10.21 1069 11,381 3.0 251
39X-4, 135-150 352.30 7.17 20.340 33.5 569 584 0.00 518 23.28 7.49 9.50 715 10,668 3.0 254
42X-3, 138-150 380.40 7.19 18.360 34.0 581 601 0.18 528 24.00 7.64 8.72 865 9,620 3.0 257
45X-3, 138-150 409.30 7.15 16.420 34.5 588 587 0.83 536 23.36 7.73 8.09 1032 9,882 3.0 268
48X-5, 135-150 441.20 7.17 14.830 34.5 593 596 0.54 536 24.27 8.84 6.77 984 8,835 2.0 277

Notes: Cl– (titr) = analyzed by titration and Cl– (IC) = analyzed by ion chromatography. Empty cell = not analyzed.