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Table T9. Whole-rock major and trace element compositions, Hole U1372A.

Hole: 330-U1372A-
Core, section: 4R-1 4R-1 4R-3 7R-2 7R-4 7R-4 9R-6 10R-6 11R-3 11R-6 12R-2 13R-1 13R-4 15R-2 17R-1 17R-2
Piece: 3 4 1 1 1 4 2 2 7 1 1 4 8 6 6 3
Interval (cm): 23–27 75–77 45–47 33–35 22–26 137–140 39–41 39–41 83–85 86–88 10–12 91–93 123–125 90–92 76–78 49–51
Top depth (mbsf): 13.73 14.25 16.65 34.62 37.48 38.63 58.63 68.53 74.61 78.10 82.00 91.01 95.36 111.46 129.46 130.66
Strat. unit: IIA IIA IIA IID IID IID IV V VI VI VI VI VI VIII XI XI
Major element oxide (wt%):
SiO2 45.65 45.20 47.05 47.02 47.09 45.68 43.92 46.87 47.04 47.36 45.68 48.86 48.57 48.27 47.51 48.56
TiO2 3.24 2.94 2.85 2.67 2.98 2.32 2.34 3.04 3.01 2.90 2.82 2.94 3.10 2.88 2.65 2.41
Al2O3 17.30 16.43 15.16 16.48 15.70 12.59 12.00 15.46 15.68 15.06 15.53 15.33 15.20 15.03 15.56 16.14
Fe2O3T 13.94 13.06 12.86 13.58 12.52 12.81 12.95 12.87 13.34 12.70 11.99 10.99 12.12 12.86 11.38 10.53
MnO 0.17 0.15 0.15 0.12 0.18 0.15 0.15 0.16 0.14 0.17 0.13 0.14 0.15 0.17 0.14 0.13
MgO 3.21 3.78 6.26 4.00 4.26 12.87 15.43 4.45 4.48 6.34 3.57 6.64 5.52 6.33 4.35 4.34
CaO 9.96 11.38 11.26 11.46 11.68 8.61 8.30 11.59 11.57 11.54 15.64 11.78 11.42 11.69 11.66 11.63
Na2O 2.96 3.31 2.90 2.83 3.41 2.57 2.05 3.12 3.23 3.05 3.15 3.16 3.41 3.21 3.24 3.09
K2O 0.79 1.32 1.40 1.95 1.03 0.52 0.55 1.19 1.33 0.69 1.55 0.69 0.76 0.72 0.70 0.62
P2O5 0.45 0.40 0.41 0.45 0.46 0.32 0.31 0.45 0.45 0.43 0.43 0.41 0.43 0.42 0.32 0.30
Totals: 97.68 97.95 100.29 100.56 99.32 98.45 97.99 99.19 100.27 100.25 100.50 100.94 100.68 101.57 97.51 97.75
LOI 2.4 1.0 2.2 3.1 1.2 3.1 1.7 1.7 2.8 1.2 6.3 2.3 1.5 1.1 1.9 2.4
Major element oxide (wt%) normalized to 100 wt%:
SiO2 46.74 46.14 46.91 46.75 47.41 46.40 44.82 47.25 46.91 47.24 45.45 48.40 48.24 47.52 48.73 49.67
TiO2 3.32 3.01 2.84 2.65 3.00 2.36 2.39 3.06 3.00 2.90 2.81 2.91 3.08 2.84 2.72 2.47
Al2O3 17.72 16.77 15.12 16.39 15.81 12.79 12.24 15.59 15.64 15.03 15.46 15.18 15.09 14.80 15.95 16.51
Fe2O3T 14.27 13.33 12.82 13.50 12.61 13.02 13.21 12.98 13.31 12.67 11.93 10.88 12.04 12.66 11.67 10.77
MnO 0.18 0.15 0.15 0.12 0.18 0.15 0.15 0.16 0.14 0.17 0.13 0.14 0.15 0.16 0.14 0.14
MgO 3.28 3.86 6.24 3.98 4.29 13.07 15.75 4.48 4.47 6.33 3.56 6.58 5.48 6.23 4.46 4.44
CaO 10.19 11.62 11.22 11.40 11.76 8.75 8.47 11.68 11.54 11.51 15.56 11.67 11.34 11.51 11.96 11.90
Na2O 3.03 3.38 2.89 2.81 3.44 2.61 2.09 3.14 3.22 3.05 3.14 3.13 3.39 3.16 3.32 3.16
K2O 0.81 1.34 1.39 1.94 1.04 0.53 0.56 1.20 1.33 0.69 1.55 0.69 0.75 0.71 0.72 0.63
P2O5 0.47 0.41 0.41 0.45 0.46 0.33 0.32 0.45 0.45 0.43 0.43 0.41 0.42 0.41 0.33 0.31
Totals: 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00
Mg# 34.9 40.2 53.1 40.7 44.2 70.0 73.5 44.6 43.9 53.8 41.0 58.5 51.4 53.4 47.0 48.9
Trace element (ppm):
Ba 121 155 150 153 172 105 109 187 175 159 141 139 151 150 128 109
Sr 542 497 524 435 482 342 389 513 482 473 479 448 468 459 451 439
Zr 232 213 215 181 224 179 161 244 234 224 262 221 237 235 196 170
Y 28 27 25 26 29 24 21 28 27 26 25 29 28 32 26 24
V 366 325 301 411 363 254 227 335 354 327 318 314 318 299 299 277
Cu 37 56 61 27 42 17 64 101 67 90 96 87 71 74 26 52
Zn 124 103 117 109 101 104 108 105 108 103 147 103 106 101 115 93
Co 60 59 63 53 59 66 74 57 60 62 57 56 61 58 52 58
Cr 97 113 318 175 103 562 698 148 157 129 181 142 164 131 103 151
Ni 46 68 177 118 70 396 472 75 87 74 84 73 70 54 64 58

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.

Hole: 330-U1372A-
Core, section: 19R-1 21R-1 22R-1 26R-2 31R-1 38R-3
Piece: 5A 15 19 1 15 2D
Interval (cm): 37.5–40.5 106–108 130–132 13–15 105–107 80–82
Top depth (mbsf): 138.58 146.06 150.50 172.02 195.65 232.01
Strat. unit: XIII XIV XIV XIV XVI XVII
Major element oxide (wt%):
SiO2 50.90 48.81 47.05 47.74 46.57 46.49
TiO2 2.68 3.41 3.51 3.56 2.12 2.12
Al2O3 16.42 16.16 15.55 15.80 15.11 14.84
Fe2O3T 11.26 10.05 12.40 10.24 10.59 10.75
MnO 0.12 0.15 0.16 0.15 0.14 0.14
MgO 7.39 3.40 3.39 3.27 8.74 6.52
CaO 5.30 10.63 11.08 9.98 11.95 12.78
Na2O 3.32 3.96 3.69 3.77 2.36 2.45
K2O 0.76 0.93 0.97 0.98 0.45 0.59
P2O5 0.23 0.49 0.48 0.48 0.28 0.28
Totals: 98.40 98.00 98.28 95.97 98.31 96.95
LOI 6.7 2.6 3.0 2.4 0.3 1.4
Major element oxide (wt%) normalized to 100 wt%:
SiO2 51.73 49.81 47.87 49.74 47.38 47.95
TiO2 2.73 3.48 3.57 3.71 2.15 2.19
Al2O3 16.69 16.49 15.82 16.47 15.37 15.31
Fe2O3T 11.45 10.26 12.62 10.67 10.77 11.09
MnO 0.12 0.15 0.17 0.16 0.14 0.15
MgO 7.51 3.47 3.44 3.41 8.89 6.72
CaO 5.38 10.85 11.28 10.40 12.15 13.18
Na2O 3.38 4.04 3.75 3.93 2.40 2.52
K2O 0.78 0.95 0.99 1.02 0.46 0.61
P2O5 0.23 0.50 0.49 0.50 0.29 0.28
Totals: 100.00 100.00 100.00 100.00 100.00 100.00
Mg# 60.4 44.1 38.9 42.6 65.8 58.5
Trace element (ppm):
Ba 160 192 181 185 97 100
Sr 360 509 499 492 430 499
Zr 206 280 263 267 151 151
Y 22 33 33 35 22 24
V 307 326 342 342 238 236
Cu 71 32 30 38 71 61
Zn 93 114 120 115 83 85
Co 59 77 65 72 67 58
Cr 139 56 100 75 424 490
Ni 68 87 54 68 168 189

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