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Table T7. Whole-rock major and trace element compositions, Hole U1346A. (See table notes.)

  Core:
324-U1346A-
6R
6R
7R
7R
7R
7R
7R
7R
8R
9R
9R
9R
10R
11R
13R
13R
13R
14R
14R
14R
14R
15R
16R
16R
Section:
1
1
1
1
2
2
3
4
1
2
2
2
1
1
1
1
2
2
2
2
2
1
1
2
Piece:
6
13
2
3
1
7
7
2
2
7
7
8
4
6
3
7
1D
2C
2F
3C
3D
21
1E
1
Interval (cm):
51–53
115–118
20–22
28–30
12–15
104–107
70–71
31–34
25–28
73–76
85–88
116–119
25–27
31–34
15–18
46–48
36–38
37–39
70–73
79–81
108–110
89–91
25–28
28–30
Top depth (mbsf):
139.40
140.04
141.90
141.98
143.23
144.14
145.31
145.78
148.85
155.56
155.68
155.99
158.44
163.31
172.65
172.96
174.13
179.21
179.54
179.63
179.92
183.08
187.24
188.24
Major element oxide (wt%):
SiO2 45.27 44.07 42.83 11.07 48.86 18.91 47.65 48.95 39.74 41.04 51.92 44.28 40.88 47.74 48.80 43.26 48.44 44.95 40.64 46.38 43.19 46.01 48.44 44.61
TiO2 1.53 1.52 1.54 0.28 1.64 0.09 1.63 1.61 1.43 1.48 1.69 1.52 1.56 1.46 1.60 1.75 1.57 1.64 1.51 1.73 1.58 1.79 1.69 1.72
Al2O3 16.74 15.95 16.49 3.75 17.39 5.62 17.63 17.38 14.31 15.78 15.34 16.16 15.74 15.47 14.97 16.95 16.55 15.37 15.90 17.05 15.82 18.08 16.93 16.92
Fe2O3T 9.65 7.17 8.21 8.95 10.32 9.74 7.62 9.74 9.75 8.01 13.03 8.75 8.00 10.88 11.09 8.71 10.49 10.39 7.85 8.82 9.69 8.01 10.70 9.49
MnO 0.04 0.09 0.12 0.53 0.05 0.26 0.09 0.06 0.10 0.10 0.05 0.10 0.15 0.10 0.11 0.09 0.07 0.12 0.14 0.07 0.11 0.16 0.05 0.09
MgO 5.98 4.22 5.34 1.69 7.81 2.83 4.91 6.82 5.81 6.15 8.77 6.92 5.44 10.11 8.45 7.09 9.06 7.76 5.81 7.08 7.66 6.06 8.84 6.92
CaO 10.00 18.40 21.71 57.56 8.57 55.36 14.74 9.38 22.15 19.74 3.76 19.83 22.44 8.78 10.08 14.66 8.18 14.52 22.59 10.56 16.34 13.63 6.94 17.39
Na2O 2.90 2.45 2.49 B.D. 3.09 0.50 2.77 2.96 2.28 2.53 2.63 2.78 2.39 2.76 2.54 2.23 2.86 2.78 2.32 2.38 2.53 1.49 2.57 2.46
K2O 1.18 1.72 1.02 1.22 0.58 1.77 3.03 2.22 0.95 0.57 3.95 0.83 1.85 0.17 0.10 2.67 0.85 0.20 1.00 3.47 2.68 4.79 3.08 1.77
P2O5 0.20 0.20 0.14 0.03 0.15 0.10 0.44 0.19 0.19 0.15 0.15 0.19 0.21 0.14 0.16 0.23 0.17 0.18 0.18 0.20 0.19 0.30 0.26 0.29
Totals:
93.50 95.80 99.89 85.09 98.46 95.18 100.51 99.31 96.72 95.55 101.28 101.36 98.66 97.61 97.90 97.65 98.23 97.91 97.94 97.72 99.80 100.32 99.50 101.65
LOI (wt%) 11.96 13.85 10.52 30.97 5.10 34.34 11.05 8.33 10.58 10.90 6.50 11.22 13.79 5.14 3.12 12.08 4.19 8.36 12.66 8.93 12.47 12.72 7.26 10.90
Major element oxide (wt%) normalized to 100 wt%:
SiO2 48.42 46.00 42.88 13.01 49.62 19.87 47.41 49.29 41.09 42.95 51.26 43.69 41.44 48.90 49.85 44.30 49.31 45.91 41.49 47.46 43.28 45.86 48.68 43.88
TiO2 1.64 1.59 1.54 0.33 1.66 0.10 1.63 1.62 1.47 1.54 1.67 1.50 1.58 1.50 1.64 1.79 1.60 1.68 1.54 1.77 1.58 1.78 1.70 1.69
Al2O3 17.91 16.65 16.51 4.41 17.66 5.90 17.54 17.50 14.80 16.51 15.15 15.94 15.95 15.85 15.29 17.36 16.85 15.70 16.24 17.44 15.86 18.02 17.01 16.64
Fe2O3T 10.32 7.48 8.22 10.52 10.48 10.23 7.58 9.81 10.08 8.39 12.86 8.64 8.11 11.14 11.33 8.92 10.67 10.61 8.02 9.03 9.71 7.99 10.75 9.34
MnO 0.04 0.10 0.12 0.62 0.05 0.27 0.09 0.06 0.11 0.10 0.05 0.10 0.15 0.10 0.11 0.09 0.07 0.13 0.14 0.07 0.11 0.16 0.05 0.08
MgO 6.40 4.41 5.35 1.99 7.93 2.97 4.88 6.87 6.01 6.44 8.66 6.83 5.51 10.36 8.63 7.27 9.23 7.93 5.94 7.24 7.68 6.04 8.88 6.80
CaO 10.70 19.21 21.73 67.64 8.71 58.17 14.67 9.45 22.91 20.66 3.72 19.56 22.74 9.00 10.29 15.01 8.33 14.83 23.06 10.80 16.37 13.58 6.98 17.11
Na2O 3.10 2.56 2.49 BD 3.14 0.52 2.75 2.98 2.36 2.65 2.59 2.74 2.43 2.82 2.60 2.28 2.91 2.84 2.37 2.43 2.54 1.48 2.58 2.42
K2O 1.27 1.80 1.02 1.44 0.59 1.86 3.01 2.24 0.98 0.60 3.90 0.81 1.88 0.17 0.10 2.73 0.86 0.20 1.02 3.55 2.69 4.77 3.10 1.74
P2O5 0.21 0.21 0.14 0.04 0.15 0.11 0.44 0.19 0.20 0.16 0.14 0.19 0.21 0.15 0.16 0.24 0.17 0.19 0.19 0.21 0.19 0.30 0.26 0.29
Totals:
100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00
Mg# 59.1 57.8 60.2 30.5 63.8 40.3 60.0 62.0 58.1 64.1 61.0 64.8 61.3 68.4 63.9 65.5 66.8 63.5 63.3 65.1 64.8 63.8 65.8 62.9
Trace element (ppm):
Ba 46 50 46 15 31 15 67 54 29 35 55 36 63 23 27 52 34 28 38 64 49 93 84 51
Sr 268 282 315 140 272 277 287 256 315 337 207 343 293 242 256 273 269 318 333 243 268 236 238 319
Zr 80 75 76 27 82 29 80 81 75 74 75 75 77 73 81 87 78 83 77 86 80 87 79 81
Y 22 23 24 23 21 16 30 23 24 26 25 24 26 27 26 26 24 26 26 27 25 27 28 27
V 306 304 301 121 321 162 345 322 293 283 327 314 279 281 298 340 304 321 301 309 292 389 348 356
Sc 41 40 41 15 45 11 42 42 37 38 42 40 40 38 37 44 41 42 39 45 41 46 42 44
Cu 118 150 128 25 123 22 142 126 137 132 36 123 141 106 113 142 120 137 132 142 136 153 205 297
Zn 69 80 95 11 78 21 98 93 70 75 103 75 91 73 77 85 87 80 82 91 78 116 97 97
Co 54 54 55 14 53 6 92 64 47 60 31 76 61 46 46 69 56 52 58 61 69 108 46 64
Cr 315 284 311 62 352 42 320 323 260 291 342 337 295 309 259 308 318 300 279 323 286 330 330 321
Ni 175 127 168 15 143 27 294 255 142 181 36 156 127 128 104 234 151 125 115 163 138 232 60 121

Notes: 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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