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Table T8. Whole-rock major and trace element compositions, Hole U1373A.

Hole:
330-U1373A-
Core, section:
1R-1 1R-2 2R-3 7R-2 7R-3 8R-2 9R-2 9R-3 10R-4 13R-3
Piece:
4B 2 4B 7B 6B 10A 5B 1B 3 2
Interval (cm):
43–45 121–123 135–137 125–127 106–108 115–117 115–118 41–43 30–32 10–12
Top depth (mbsf):
0.43 2.01 13.62 35.19 36.49 39.97 44.46 45.17 50.85 63.68
Strat. unit:
I I II IV IV VI VII VII VII VII
Major element oxide (wt%):
SiO2 47.05 46.28 45.64 45.24 46.12 48.53 44.37 49.65 47.23 49.76
TiO2 3.35 2.17 3.41 2.39 2.73 3.16 3.18 3.13 3.10 3.21
Al2O3 14.56 12.84 14.71 12.67 13.53 15.41 15.34 15.14 15.10 15.29
Fe2O3T 13.50 11.92 14.64 12.89 12.91 13.45 13.32 11.68 13.16 13.33
MnO 0.15 0.16 0.17 0.16 0.18 0.17 0.20 0.17 0.16 0.16
MgO 6.63 13.62 5.14 13.27 10.73 5.17 4.76 5.42 6.17 5.97
CaO 10.71 11.58 11.45 11.98 12.12 11.71 11.02 12.23 11.69 11.81
Na2O 2.75 1.91 2.70 2.26 2.59 3.18 3.32 3.27 3.21 3.16
K2O 1.00 0.45 2.70 0.70 0.84 1.19 1.33 0.97 0.79 0.74
P2O5 0.49 0.25 0.55 0.40 0.47 0.48 0.52 0.46 0.47 0.48
Totals:
100.19 101.18 101.11 101.95 102.21 102.44 97.35 102.12 101.08 103.92
LOI 2.4 1.1 7.2 2.3 1.9 2.2 2.0 2.3 1.5 0.9
Major element oxide (wt%) normalized to 100 wt%:
SiO2 46.97 45.74 45.14 44.38 45.12 47.37 45.58 48.62 46.73 47.89
TiO2 3.34 2.14 3.38 2.34 2.67 3.08 3.26 3.06 3.07 3.09
Al2O3 14.53 12.69 14.55 12.43 13.23 15.05 15.76 14.83 14.93 14.72
Fe2O3T 13.48 11.78 14.48 12.64 12.63 13.13 13.69 11.44 13.02 12.83
MnO 0.15 0.16 0.17 0.16 0.17 0.16 0.20 0.16 0.16 0.15
MgO 6.62 13.46 5.08 13.02 10.50 5.05 4.89 5.31 6.10 5.75
CaO 10.69 11.45 11.32 11.75 11.86 11.43 11.32 11.98 11.56 11.36
Na2O 2.75 1.89 2.67 2.21 2.54 3.10 3.42 3.20 3.17 3.05
K2O 1.00 0.44 2.67 0.68 0.82 1.16 1.36 0.95 0.78 0.71
P2O5 0.49 0.24 0.54 0.39 0.46 0.47 0.53 0.45 0.46 0.46
Totals:
100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00
Mg# 53.3 72.7 45.0 70.6 65.9 47.2 45.4 51.9 52.2 51.0
Trace element (ppm):
Ba 207 95 232 176 221 168 179 163 162 172
Sr 607 382 417 610 726 511 522 536 527 553
Zr 258 138 258 171 200 234 210 232 211 235
Y 31 20 27 21 23 31 31 31 30 31
V 339 275 285 255 263 342 354 344 339 342
Sc 23 33 22 29 25 30 31 30 30 30
Cu 58 90 95 106 107 105 132 125 111 125
Zn 120 90 119 92 96 108 174 112 105 109
Co 64 70 69 70 68 62 64 58 60 66
Cr 9 794 270 729 466 68 55 53 63 52
Ni 39 341 161 381 277 65 70 72 70 69

All analyses were conducted on samples ignited to 960°C. Fe2O3T = total iron expressed as Fe2O3. LOI = weight loss on ignition. Mg# = 100 × Mg2+/(Mg2+ + Fe2+), assuming that Fe2O3/FeO = 0.15.

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