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Table T20. Interstitial water constituents, Hole U1409A.

Core, section,
interval (cm) 		Depth
(mbsf) 		pH Alkalinity
(mM) 		Ammonium
(µM) 		Salinity Cl–
(mM) 		Na+
(mM) 		SO42–
(mM) 		HPO4–
(µM) 		B
(µM) 		Mn2+
(µM) 		Fe2+
(µM) 		Ca2+
(mM) 		Mg2+
(mM) 		K+
(mM) 		Mg/Ca
342-U1409A-
2H-6, 135–140 9.95 7.599 3.737 29 37 ND 494.204 ND BDL 375.740 53.607 BDL 11.686 53.607 15.259 4.6
3H-6, 145–150 19.55 7.441 3.686 22 37 589.681 484.273 28.124 BDL 465.037 52.517 BDL 11.504 52.517 15.483 4.6
4H-6, 145–150 29.05 7.438 3.467 36 37 598.458 481.040 28.697 BDL 502.896 52.660 BDL 11.804 52.660 13.118 4.5
5H-5, 145–150 37.05 7.379 2.965 29 37 595.309 487.071 29.590 BDL 437.119 51.921 BDL 11.904 51.921 13.924 4.4
6H-6, 145–150 48.05 7.369 3.050 12 37 598.650 484.472 29.066 BDL 529.348 51.308 4.719 11.976 51.308 14.062 4.3
7H-6, 145–150 57.57 7.304 3.140 12 37 583.852 483.337 28.260 BDL 537.956 51.369 0.21 12.483 51.369 13.394 4.1
8H-6, 145–150 67.05 7.306 3.175 34 37 594.935 488.762 28.550 BDL 455.839 51.197 BDL 12.793 51.197 11.684 4.0
9H-6, 145–150 76.56 7.268 3.315 12 38 608.114 495.797 27.934 BDL 468.141 51.950 BDL 13.433 51.950 13.947 3.9
10H-6, 136–141 85.96 7.280 3.173 21 37 591.997 482.219 27.421 BDL 457.877 50.404 BDL 13.416 50.404 11.618 3.8
11H-6, 145–150 95.55 7.276 3.354 42 37 592.634 483.247 26.660 BDL 396.860 51.105 BDL 13.994 51.105 11.439 3.7
12H-6, 145–150 105.05 7.256 3.746 12 38 597.337 488.888 27.583 BDL 323.788 50.837 BDL 14.539 50.837 11.013 3.5
13H-6, 125–130 114.39 7.121 3.716 27 38 606.582 499.049 27.212 BDL 347.003 51.609 BDL 14.968 51.609 11.749 3.4
14H-6, 145–150 124.05 7.235 3.863 18 38 616.541 499.918 27.285 BDL 313.657 51.427 BDL 15.456 51.427 10.657 3.3
17X-2, 145–150 129.95 7.206 3.864 59 37 607.619 496.434 25.218 BDL 391.985 44.715 BDL 18.139 44.715 11.152 2.5
18X-4, 145–150 137.55 7.241 3.988 31 37 608.612 495.954 24.697 BDL 338.700 43.508 BDL 18.927 43.508 10.855 2.3
20X-6, 132–142 159.62 7.122 4.010 72 38 599.269 498.343 24.889 BDL 353.230 41.273 BDL 19.713 41.273 9.260 2.1
22X-6, 101–111 178.51 7.066 3.647 25 37 602.706 492.929 24.004 BDL 350.755 40.365 BDL 19.925 40.365 9.517 2.0
23X-5, 142–150 187.02 7.112 3.728 63 37 600.406 496.655 23.423 BDL 365.209 40.040 BDL 20.217 40.040 8.603 2.0
24X-4, 140–150 195.10 6.925 4.093 38 37 608.824 505.314 22.932 BDL 363.800 40.033 BDL 20.521 40.033 8.743 2.0

BDL = below detection limit (HPO4– = 0.2 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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