Table 10. Interstitial water composition for Holes 1087A and 1087C.
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)
175-1087A-
1H-1, 140-150 1.40 7.51
35.0 552 546 27.55 471 52.73 9.91 10.63 225 34 11
1H-3, 140-150 4.40 7.32 3.147 35.0 550 552 27.48 466 54.22 10.88 11.76 321 142 16
2H-3, 140-150 12.60 7.58 5.371 35.0 554 544 26.83 471 54.19 10.86 11.54 445 595 19
3H-3, 130-140 22.00 7.72 14.311 34.5 558 550 16.89 476 52.78 6.65 10.76 631 1793 37
4H-3, 140-150 31.60 7.72 18.109 35.0 559 562 13.03 466 52.50 7.43 18.01 605 2429 42
5H-3, 140-150 41.10 7.84 23.866 36.0 555 553 8.90 478 48.32 5.66 11.67 629 3044 48
6H-3, 140-150 50.60 7.85 26.588 37.5 556 548 5.57 483 45.67 4.59 10.37 605 3400 48
7H-3, 140-150 60.10 7.82 28.391 34.0 555 542 3.84 483 44.45 4.31 10.86 618 3746 53
8H-4, 140-150 71.10 7.84 30.145 33.0 556 541 1.02 486 41.93 4.12 10.54 696 4069 69
9H-3, 140-150 79.10 7.71 31.233 33.5 555 543 0.58 485 41.80 4.42 10.87 714 4371 48
10H-3, 140-150 88.60 7.58 30.971 33.5 555 543 0.76 490 39.88 4.34 9.65 696 4371 46
11H-3, 140-150 98.10 6.52 29.839 33.5 553 543 0.36 484 39.36 5.17 10.54 670 4706 43
14H-3, 140-150 126.60 6.83 30.397 33.0 547 539 0.22 479 38.34 6.14 9.85 605 4695 43
17H-3, 140-150 155.10 6.97 26.398 33.0 547 535 0.40 474 38.44 6.82 9.82 525 4911 30
20H-3, 140-150 183.60 6.70 27.110 33.0 547 554 0.84 475 37.89 7.81 9.48 471 4814 20
23H-3, 140-150 212.10 6.71 25.785 32.5 546 542 0.22 482 34.03 7.16 8.34 455 4652 16
26H-3, 140-150 240.60 6.86 22.411 32.0 545 535 0.53 482 32.21 7.19 7.94 414 4296 11
27H-5, 140-150 253.10 6.69 22.542 32.0 546 541 0.43 477 34.04 7.92 7.94 437 4361 13
175-1087C-
25H-3, 140-150 224.50 6.79 24.806 32.5









28X-3, 140-150 253.00 6.95 22.461 32.0









31X-3, 140-150 275.20 6.77 19.151 32.0









34X-3, 140-150 304.10 6.89 18.168 32.0









37X-3, 140-150 332.90 6.93 16.176 31.5









40X-3, 140-150 361.80 7.12 11.624 31.0









43X-3, 135-150 390.65 7.32 8.268 30.5









46X-3, 135-150 419.55 7.12 6.389 30.5









49X-3, 135-150 448.45 7.29 3.362 30.5









52X-3, 135-150 477.45 7.15 2.134 31.5









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