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Table T21. Interstitial water constituents, Hole U1403A.

Core, section,
interval (cm)
Depth
(mbsf)
pH Alkalinity
(mM)
Ammonium
(μM)
Salinity Cl
(mM)*
Cl
(mM)
Na+
(mM)
SO42–
(mM)
HPO4
(μM)
Mn2+
(μM)
Fe2+
(μM)
Ca2+
(mM)
Mg2+
(mM)
Sr2+
(μM)
K+
(mM)
342-U1403A-
2H-6, 145–150 14.75 7.39 2.93 7 36 560 571 518 31.5 BDL BDL 1.2 12.6 56.6 78.5 12.3
3H-6, 145–150 24.25 7.29 2.96 5 37 540 574 529 35.6 BDL BDL 0.2 13.8 58.7 86.7 12.3
4H-6, 115–120 33.45 7.39 3.10 0 37 551 596 530 35.3 BDL 17.1 1.0 14.7 56.8 88.0 11.8
5H-6, 125–130 43.05 7.25 3.21 18 37 569 598 519 30.6 BDL 44.9 1.5 16.1 56.2 92.5 10.3
6H-6, 145–150 52.83 ND ND ND ND ND 577 521 32.0 BDL 68.0 BDL 17.6 54.9 98.2 12.9
7H-6, 145–150 62.25 7.14 3.22 16 36 537 598 511 29.0 BDL 81.2 0.4 19.3 56.9 108.4 10.0
8H-6, 145–150 71.78 7.02 5.39 56 36 546 570 493 30.2 BDL 102.8 0.0 20.8 55.3 115.7 9.8
9H-6, 120–130 80.90 7.05 2.69 73 37 556 591 523 27.9 BDL 115.3 BDL 20.9 53.0 121.6 9.7
10H-6, 140–150 90.61 ND ND 38 37 ND 584 519 28.4 BDL 124.2 BDL 21.9 52.1 130.2 9.2
11H-6, 140–150 100.20 7.18 4.37 34 37 560 604 530 28.3 BDL 126.9 BDL 26.3 54.4 138.2 11.4
13H-6, 136–146 119.04 7.25 4.57 68 38 562 591 509 31.0 BDL 108.1 BDL 28.5 51.1 144.4 7.8
14H-6, 136–146 128.54 7.19 4.31 56 38 570 598 522 26.3 BDL 109.3 0.1 29.5 49.4 147.6 9.3
15H-5, 140–150 136.70 7.02 4.46 51 38 570 585 515 30.6 BDL 127.6 BDL 29.7 48.5 145.5 10.2
19X-6, 120–130 164.70 7.24 3.54 70 37 ND 602 498 23.5 BDL 155.8 0.3 38.6 46.2 177.9 9.8
20X-6, 130–140 174.50 6.98 3.64 132 37 ND 581 477 26.8 BDL 163.7 BDL 39.7 46.0 183.7 6.5
23X-6, 130–140 203.40 7.24 3.47 79 37 575 586 469 19.3 BDL 183.8 1.3 42.8 39.5 197.9 8.0
27X-5, 140–150 231.60 7.19 3.07 72 38 572 592 477 19.6 BDL 196.5 0.5 47.8 37.0 203.5 6.3
28X-5, 140–150 241.30 7.10 2.98 138 38 583 597 480 20.5 BDL 196.3 1.5 46.3 37.2 209.4 6.3

* = manual titration. † = ion chromatograph. BDL = below detection limit (HPO4 = 0.2 µM, Mn2+ = 0.1 µM, Fe2+ = 0.6 µM), calculated as two times the standard deviation of multiple measures of a blank. ND = not detected.

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