Table T7. X-ray fluorescence analyses of major and trace elements for Site 1140 igneous units.
 
Hole: 1140A 1140A 1140A 1140A 1140A 1140A 1140A 1140A 1140A 1140A 1140A
Core, section: 26R-1 27R-2 28R-3 31R-1 32R-1 33R-2 34R-5 35R-4 36R-3 37R-1 37R-3
Interval (cm): 7-10 0-5 29-32 53-57 55-57 78-81 3-6 50-52 121-124 46-49 104-108
Piece: 1 1A 1B 3B 4 3 1A 4 1H 1C 2
Unit: 1 1 1 2 3 5 6 6 6 6 6
Rock type: Basalt Basalt Basalt Basalt Basalt Basalt Basalt Basalt Basalt Basalt Basalt
Depth (mbsf): 237.37 240.71 249.64 271.03 275.75 286.80 299.44 308.41 316.62 317.76 320.25
Major element oxides (wt%):                  
SiO2 49.07 48.88 48.90 49.77 49.28 49.66 50.44 50.74 49.78 50.00 49.77
TiO2 1.48 1.48 1.47 2.36 3.16 1.40 1.53 1.53 1.52 1.55 1.54
Al2O3 15.62 15.59 15.65 15.08 13.79 16.48 15.52 15.36 14.76 14.85 14.77
Fe2O3 12.93 12.78 12.67 14.34 14.85 11.90 11.78 10.85 13.14 13.32 13.20
MnO 0.19 0.18 0.18 0.20 0.19 0.16 0.19 0.18 0.21 0.20 0.29
MgO 6.77 8.12 7.87 5.54 6.18 7.94 6.86 7.55 7.31 6.71 6.29
CaO 12.71 11.92 12.11 11.02 10.00 11.45 12.63 12.25 12.41 12.47 12.37
Na2O 2.11 2.06 2.06 2.24 2.46 2.09 2.26 2.30 2.20 2.21 2.23
K2O 0.38 0.03 0.04 0.82 0.62 0.03 0.16 0.21 0.17 0.16 0.53
P2O5 0.10 0.09 0.09 0.26 0.45 0.12 0.14 0.14 0.14 0.13 0.14
Total: 101.34 101.13 101.03 101.62 100.96 101.23 101.50 101.10 101.62 101.57 101.11
LOI: 1.84 1.62 1.01 1.12 0.72 1.46 0.92 0.97 0.82 1.04 0.92
Mg# (0.8)*: 0.56 0.61 0.61 0.49 0.51 0.62 0.59 0.63 0.58 0.55 0.54
Trace elements (ppm):                  
Rb 9.5 0.8 1 10.8 3.9 0.3 0.7 1.5 0.7 0.7 11.5
Ba 56 57 67 105 155 64 64 76 64 60 111
Sr 142 129 132 259 262 126 134 138 125 127 137
Ce BD BD BD 5 28 BD BD BD BD BD BD
Nb 4.8 4.4 4.7 14.6 22.9 5.1 5 5.3 5.3 5.2 5.7
Zr 87 86 88 169 239 81 83 82 80 82 82
Y 31 32 32 33 46 31 31 31 30 31 31
V 337 325 324 354 429 330 366 378 347 353 356
Cr 301 288 293 118 57 276 209 192 191 159 172
Ni 97 96 98 64 47 79 64 71 62 58 49
Cu 150 150 151 114 118 149 168 171 160 164 154
Zn 88 86 86 107 130 89 92 92 89 88 90
Normative mineralogy:                  
Fe2+ = 0.8 Fe total                      
Q 0.00 0.00 0.00 1.75 2.36 0.44 1.07 1.00 0.00 0.82 0.12
Or 2.21 0.18 0.21 4.82 3.67 0.18 0.94 1.24 1.00 0.94 3.13
Ab 17.78 17.40 17.41 18.85 20.84 17.62 18.96 19.36 18.49 18.59 18.80
An 31.92 33.15 33.33 28.51 24.80 35.37 31.56 30.91 29.70 29.96 28.71
Corundum 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Nepheline 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Leucite 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Acmite 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Na metasilicate 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Wo (Di) 12.61 10.55 10.89 10.08 9.16 8.54 12.43 12.01 12.75 12.81 13.22
En (Di) 6.88 6.16 6.31 5.05 4.91 5.07 7.10 7.30 7.11 6.89 6.93
Fs (Di 5.27 3.88 4.07 4.80 3.94 3.02 4.78 4.03 5.13 5.48 5.90
En (Hy) 7.80 11.90 11.59 8.63 10.45 14.57 9.81 11.39 10.76 9.65 8.66
Fs (Hy) 5.98 7.49 7.46 8.20 8.40 8.70 6.61 6.29 7.77 7.68 7.37
Ol (Fo) 1.44 1.44 1.13 0.00 0.00 0.00 0.00 0.00 0.11 0.00 0.00
Ol (Fa) 1.22 1.00 0.81 0.00 0.00 0.00 0.00 0.00 0.08 0.00 0.00
Ilmenite 2.81 2.81 2.79 4.47 6.02 2.66 2.89 2.90 2.87 2.92 2.92
Magnetite 3.75 3.71 3.68 4.15 4.32 3.45 3.40 3.14 3.79 3.85 3.83
Apatite 0.22 0.20 0.20 0.57 0.99 0.26 0.30 0.31 0.30 0.27 0.31
Total: 99.88 99.87 99.87 99.87 99.85 99.87 99.87 99.86 99.87 99.88 99.88

Notes: LOI = loss on ignition at 1025°C for 4 hr. * = (Mg# = Mg/[Mg+Fe2+]), where Fe2+ = 0.8 Fe total. BD = below detection limit.