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Table T6. Whole-rock major and trace element compositions, Hole U1348A. (See table notes.)

  324-U1348A-
Stratigraphic unit:
II III V VI
Core:
12R* 12R* 14R‡ 14R† 15R‡ 17R† 17R† 17R† 17R† 17R‡ 18R‡ 20R‡ 26R‡
Section:
1 CC 1 3 1 1 1 3 3 5 3 4 2
Piece:
9 5 3 1 1 6 15 5 3 4 8 4A 7
Interval (cm):
17–18 6–8 18–20 56–57 56–57 27–28 58–59 52–54 92–94 76–77 49–50 78–80 104–106
Top depth (mbsf):
180.47 180.77 199.68 203.07 209.66 228.57 228.88 231.46 231.86 234.04 240.76 262.11 317.06
Major element oxide (wt%):
SiO2 62.79 58.15 34.32 49.41 48.89 53.05 53.30 50.24 46.60 47.93 38.36 48.96 49.10
TiO2 0.19 0.12 1.46 2.00 2.42 2.59 2.73 2.31 2.10 2.40 2.06 1.88 1.64
Al2O3 19.43 14.01 11.81 16.70 14.09 17.64 18.98 17.50 15.08 13.86 12.80 14.47 14.81
Fe2O3T 6.32 16.29 6.41 8.56 15.80 7.17 7.04 3.45 6.17 15.43 8.60 12.71 12.76
MnO BD 0.01 0.17 0.03 0.11 0.04 0.05 0.04 0.08 0.11 0.20 0.11 0.14
MgO 3.79 4.90 4.06 7.58 10.19 4.90 2.27 2.45 4.15 9.91 4.80 9.56 12.95
CaO BD BD 39.76 9.46 2.83 8.01 7.85 13.17 15.69 3.47 31.19 6.45 2.91
Na2O 4.01 2.72 2.00 3.23 3.43 3.25 3.59 3.58 3.68 3.51 3.08 3.79 3.20
K2O 3.34 2.78 1.98 1.15 2.02 3.45 4.18 4.52 3.70 2.25 3.03 2.63 1.07
P2O5 BD BD 0.05 3.09 0.13 1.99 1.53 5.64 6.18 0.08 0.08 0.36 BD
Total:
99.88 98.97 102.05 101.21 99.92 102.08 101.51 102.89 103.42 98.95 104.22 100.91 98.57
LOI 11.68 9.12 27.08 3.69 8.94 6.22 6.40 8.28 12.44 12.77 25.09 12.86 12.34
Major element oxide (wt%) normalized to 100 wt%:
SiO2 62.87 58.75 33.63 48.82 48.93 51.97 52.51 48.83 45.06 48.44 36.81 48.52 49.81
TiO2 0.19 0.12 1.43 1.98 2.43 2.53 2.69 2.24 2.03 2.43 1.98 1.86 1.67
Al2O3 19.45 14.16 11.58 16.50 14.10 17.28 18.70 17.00 14.58 14.00 12.29 14.33 15.02
Fe2O3T 6.33 16.46 6.28 8.45 15.81 7.02 6.94 3.35 5.96 15.59 8.25 12.59 12.94
MnO BD 0.01 0.17 0.03 0.11 0.04 0.05 0.04 0.08 0.11 0.20 0.11 0.14
MgO 3.80 4.95 3.98 7.49 10.20 4.80 2.23 2.38 4.02 10.02 4.61 9.47 13.14
CaO BD BD 38.97 9.35 2.83 7.85 7.74 12.80 15.18 3.50 29.93 6.39 2.95
Na2O 4.02 2.75 1.96 3.19 3.43 3.18 3.53 3.48 3.55 3.55 2.96 3.75 3.25
K2O 3.34 2.81 1.94 1.13 2.02 3.38 4.12 4.40 3.57 2.27 2.91 2.61 1.08
P2O5 BD BD 0.05 3.06 0.13 1.95 1.51 5.48 5.98 0.08 0.08 0.36 BD
Total:
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# 58.3 41.2 59.6 67.3 60.0 61.4 42.8 62.3 61.0 59.9 56.5 63.6 70.3
Trace element (ppm):
Ba 35 13 31 30 83 35 51 67 108 104 98 94 64
Sr 65 53 97 262 70 238 250 378 394 63 101 92 63
Zr 210 281 93 101 155 162 147 150 130 154 129 189 105
Y 24 17 25 96 26 87 67 233 186 23 26 39 20
V 26 14 202 264 342 324 415 207 261 332 316 249 281
Sc 5 4 27 32 35 24 20 20 22 33 31 30 35
Cu 9 BD 94 121 74 118 132 112 99 69 84 79 110
Zn 95 224 74 291 119 80 184 10 108 123 99 102 119
Co 10 11 35 135 62 43 47 30 35 54 48 53 49
Cr 6 103 148 219 284 212 231 199 158 252 163 151 244
Ni 50 62 109 310 151 99 101 74 97 136 131 113 128

Notes: * = clay-rich layers, † = handpicked chips of clasts separated from the bulk rock, ‡ = bulk volcaniclastic material. All analyses were conducted on samples ignited to 975°C. Fe2O3T = total iron expressed as Fe2O3. LOI = weight loss on ignition. Mg# = 100 x (Mg2+/[Mg2+ + Fe2+]), assuming that Fe2O3/FeO = 0.15. BD = below detection.

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