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Table T13. X-ray fluorescence analyses of major and trace elements for Site 1138 igneous units.

Hole: 1138 1138 1138 1138 1138 1138 1138 1138 1138 1138 1138
Core, section: 74R-1 74R-1 78R-3 80R-1 80R-3 80R-5 81R-2 81R-5 82R-1 82R-5 83R-4
Interval (cm): 13-16 24-30 50-54 53-56 19-23 17-20 23-25 2-5 127-131 69-72 33-37
Piece: 1 4 — 8 2 3 1B 1A 12 6B 2
Unit: 1 1 2 3 4 5 6 7 8 9 10
Rock type: Dacite Dacite Pumice lithic breccia Plagioclase-
phyric basalt		 Plagioclase-
phyric basalt		 Basalt Basalt Plagioclase-
phyric basalt		 Basalt Basalt Basalt
Depth (mbsf): 698.23 698.34 730.50 746.83 749.39 752.21 757.54 761.38 766.87 772.23 779.84
Major element oxides (wt%):








SiO2 63.97 63.85 68.06 49.45 48.67 48.89 47.91 47.95 48.19 48.75 48.44
TiO2 1.57 1.53 0.52 1.92 2.11 2.17 2.14 2.02 2.27 2.18 2.19
Al2O3 14.77 14.76 15.11 16.76 15.30 15.81 15.73 14.70 14.42 15.72 14.38
Fe2O3 9.40 9.33 5.13 12.07 13.46 11.93 13.54 14.01 14.47 11.90 14.88
MnO 0.04 0.04 0.05 0.26 0.30 0.22 0.28 0.34 0.35 0.22 0.26
MgO 0.34 0.25 1.32 5.21 6.40 6.03 6.38 6.96 6.46 6.05 5.72
CaO 3.43 3.58 0.86 11.59 10.69 11.62 10.92 9.93 10.55 11.58 11.05
Na2O 3.40 3.53 2.62 2.33 2.45 2.38 2.20 2.15 2.31 2.48 2.41
K2O 2.65 2.70 6.92 0.22 0.24 0.23 0.38 1.07 0.37 0.23 0.26
P2O5 0.59 0.58 0.02 0.19 0.22 0.21 0.22 0.20 0.26 0.21 0.26
Total: 100.13 100.13 100.58 99.96 99.84 99.48 99.68 99.31 99.62 99.31 99.84
LOI 2.25 1.69 2.52 1.09 0.49 0.43 1.04 0.80 0.18 0.89 0.41
Mg#* 0.08 0.06 0.39 0.52 0.54 0.56 0.52 0.55 0.52 0.56 0.49












Trace elements (ppm):                  
Rb 69 73 187 3 4 2 5 12 3 11 2
Sr 182 198 173 243 227 244 211 193 207 206 210
Nb† 51 48 116 11 14 13 13 12 15 15 16
Zr 673 711 1016 130 147 137 135 129 164 157 176
Y 67 73 39 33 33 31 32 29 38 35 37
V 36 46 21 385 413 452 417 401 460 390 401
Cr 10 2 11 88 80 113 88 78 100 56 72
Ni 6 9 22 57 53 61 57 56 50 46 42
Cu 29 35 9 120 124 119 194 114 170 154 170
Zn 147 143 115 96 108 110 104 106 125 111 116












Normative mineralogy:                  
Fe2+:Fe3+ = 0.8                    
Q 24.2 22.0 19.7 2.1 0.1 1.0 0.0 7.0 0.1 0.4 0.6
Or 15.7 15.6 40.1 1.2 1.4 1.3 2.1 6.6 2.1 1.3 1.5
Ab 28.9 29.1 21.7 19.1 20.1 19.6 18.1 21.5 18.9 20.5 19.7
An 13.2 13.6 4.0 33.6 29.1 31.0 31.0 23.2 27.0 30.4 26.7
Cor 1.5 0.9 1.8 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Wo (Di) 0.0 0.0 0.0 8.7 8.7 10.0 8.4 7.1 9.2 10.2 10.3
En (Di) 0.0 0.0 0.0 3.8 3.8 4.3 3.6 3.1 4.0 4.4 4.4
Fs (Di 0.0 0.0 0.0 3.5 3.2 3.3 3.0 2.4 3.6 3.3 4.7
En (Hy) 0.8 0.6 3.2 8.8 11.6 10.3 11.3 9.6 11.6 10.3 9.3
Fs (Hy) 8.4 8.8 5.4 8.2 9.9 7.9 9.6 7.5 10.5 7.8 9.9
Ol (Fo) 0.0 0.0 0.0 0.0 0.0 0.0 0.3 0.0 0.0 0.0 0.0
Ol (Fa) 0.0 0.0 0.0 0.0 0.0 0.0 0.5 0.0 0.0 0.0 0.0
Ilmenite 3.0 2.8 1.0 3.5 3.9 4.0 4.0 4.7 4.2 4.0 4.0
Magnetite 2.7 5.3 2.9 6.8 7.6 6.8 7.6 6.5 8.1 6.8 8.4
Apatite 1.3 1.2 0.0 0.4 0.5 0.4 0.5 0.8 0.5 0.4 0.5
Total: 99.8 99.9 99.9 99.9 99.9 99.9 99.9 99.9 99.9 99.9 99.9

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