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Table T7. Geochemistry of interstitial water in sediments sampled from Hole C0021B.

Core, section,
interval (cm)
Depth
(mbsf)
Salinity
(refractive
index)*
pH Alkalinity
(mM)
Chlorinity
(mM)
Br
(mM)
SO42–
(mM)
PO43–
(μM)
NH4+
(mM)
Na+
(mM)
K+
(mM)
Mg2+
(mM)
Ca2+
(mM)
Li
(μM)
B
(μM)
Mn
(μM)
338-C0021B-
1H-4 3.7 1.33930 8.01 9.5 554.3 0.82 18.6 28.6 0.16 475 12.1 49.0 7.6 35.0 535 1.1
2H-3 81.6 1.33892 7.78 26.8 545.6 0.95 1.3 82.2 4.99 496 10.8 32.2 2.3 30.5 421 2.8
3H-4 91.7 1.33887 7.79 26.3 541.7 0.94 1.4 82.9 5.14 493 10.2 31.1 2.8 32.9 388 4.5
4H-6 104.9 1.33889 7.80 25.5 545.8 0.97 1.0 61.2 5.50 503 10.7 29.1 3.1 35.8 391 4.3
5H-2 109.9 1.33888 7.80 24.6 544.1 0.97 1.0 61.4 5.65 499 10.4 28.4 3.1 34.8 376 4.3
6H-3 119.5 1.33886 7.84 22.6 545.7 0.98 1.0 56.3 5.91 492 9.6 26.5 3.3 36.5 357 3.9
7H-4 129.9 1.33887 7.84 22.6 544.9 0.97 1.1 50.7 6.15 502 9.5 26.3 3.8 37.6 342 3.9
8H-2 138.0 1.33885 7.88 20.8 545.4 0.98 1.1 38.1 6.42 508 9.7 25.5 3.5 40.5 335 3.1
9H-2 147.5 1.33885 7.85 19.2 548.7 1.05 1.0 30.1 6.70 499 9.7 23.9 3.7 41.2 299 2.5
10H-8 162.1 1.33884 7.80 16.8 549.3 0.95 0.9 26.4 6.96 494 10.4 22.4 3.7 42.3 297 1.6
12H-2 170.0 1.33885 7.71 18.7 549.7 0.94 1.3 48.2 6.88 501 8.9 23.3 5.0 41.1 328 2.6
13T-3 177.4 1.33887 7.91 19.0 547.6 1.00 1.4 57.4 6.82 506 9.1 23.3 5.5 40.1 321 2.8
14T-2 186.4 1.33886 7.73 17.3 546.5 1.01 2.4 73.9 6.87 501 8.9 23.9 6.0 38.3 321 3.7

* = data not corrected.

Core, section, interval (cm) Depth (mbsf) Fe
(μM)
Si
(μM)
Sr
(μM)
Ba
(μM)
V
(nM)
Cu
(nM)
Zn
(nM)
Rb
(nM)
Mo
(nM)
Cs
(nM)
Pb
(nM)
U
(nM)
338-C0021B-
1H-4 3.7 2.78 783 83.3 1.0 39.5 35 600 1,609 3 3.10 0.46 2.44
2H-3 81.6 4.86 863 84.6 98.9 27.5 2,976 1,388 1,223 48 4.74 0.17 2.15
3H-4 91.7 3.37 727 84.6 93.5 23.1 785 486 1,171 21 5.21 0.12 1.09
4H-6 104.9 5.85 837 86.7 89.6 24.4 1,754 552 1,197 18 5.57 0.13 1.06
5H-2 109.9 6.06 845 85.3 87.3 21.6 2,466 419 1,112 34 4.62 0.15 2.08
6H-3 119.5 3.37 804 85.3 83.9 23.3 503 331 1,130 15 5.45 0.10 1.68
7H-4 129.9 5.25 876 86.8 79.0 18.0 363 499 1,085 27 5.08 0.00 0.82
8H-2 138.0 5.83 857 83.8 75.6 21.5 1,463 509 1,064 65 4.74 0.16 1.97
9H-2 147.5 1.56 747 85.1 69.5 19.8 327 408 1,075 43 4.90 0.00 2.66
10H-8 162.1 1.68 809 81.7 60.4 24.8 1,164 384 1,060 217 5.23 0.37 2.73
12H-2 170.0 3.58 933 88.7 52.7 16.2 618 336 921 27 3.96 0.00 0.73
13T-3 177.4 1.48 841 90.9 49.3 24.1 141 339 945 136 4.48 0.30 2.30
14T-2 186.4 3.34 722 90.9 41.6 17.1 80 264 914 88 4.11 0.00 1.37

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