Table T12. Major and trace element data for felsic samples from Site 1137.

Hole: 1137A 1137A 1137A 1137A 1137A
Core, section: 33R-3 33R-5 34R-2 35R-2 41R-1
Interval (cm): 46-49 7-9 111-113 44-46 128-130
Piece: 1B 1 1D 5 6B
Unit: 5 6 6 6 9
Rock type: Volcanic lithic sandstone Trachyte Rhyolite Garnet-biotite gneiss Crystal-vitric tuff
Depth (mbsf): 288.93 291.26 296.55 306.10 344.28
Major element oxides (wt%):      
SiO2 65.59 64.92 73.47 73.25 57.80
TiO2 1.00 0.80 0.29 0.43 0.78
Al2O3 14.79 15.43 13.23 13.45 24.57
Fe2O3 5.85 5.88 2.36 3.70 7.82
MnO 0.05 0.06 0.03 0.05 0.07
MgO 0.86 BD BD BD 0.20
CaO 0.72 1.53 0.72 2.21 0.68
Na2O 2.34 3.08 2.89 1.41 1.90
K2O 7.47 6.47 6.50 4.23 4.05
P2O5 0.16 0.18 0.03 0.17 0.07
Total: 98.81 98.34 99.50 98.87 97.92
Total Alkali 9.81 9.55 9.38 5.63 5.95
LOI 0.99 0.62 0.52 0.2 6.92
Trace elements (ppm):      
Rb 157.4 145.9 211.6 188.3 52.9
Ba 465 777 153 740 102
Sr 109 219 38 106 36
Ce 178 164 214 93 373
Nb 78.9 65.2 100.7 7.7 304.7
Zr 1063 1274 582 316 1117
Y 48 36 25 36 43
V 76 12 9 21 40
Cr 66 BD BD BD 13
Ni 19 7 6 7 15
Cu 10 9 6 6 9
Zn 111 132 86 54 224
Normative mineralogy:    
Q 18.4 16.8 29.2 42.9
Or 44.0 38.3 38.3 25.0
Ab 19.7 26.1 24.4 11.9
An 2.5 6.4 3.3 9.8
Cor 1.9 1.0 0.2 3.0
Wo (Di) 0.0 0.0 0.0 0.0
En (Di) 0.0 0.0 0.0 0.0
Fs (Di 0.0 0.0 0.0 0.0
En (Hy) 2.1 0.0 0.0 0.0
Fs (Hy) 5.6 6.0 2.5 3.9
Ol (Fo) 0.0 0.0 0.0 0.0
Ol (Fa) 0.0 0.0 0.0 0.0
Ilmenite 1.9 1.5 0.6 0.8
Magnetite 3.4 3.4 1.4 2.2
Apatite 0.3 0.4 0.1 0.4
Total: 99.9 99.9 99.9 99.9

Notes: BD = below detection limit. LOI = loss on ignition at 1025°C for 4 hr.