Table T7. Major and trace element data.
 
Leg, hole,
core, section:
183-1136A-15R-2, 183-1136A-16R-1, 183-1136A-16R-3, 183-1136A-17R-1, 183-1136A-18R-3, 183-1136A-18R-4,
Interval (cm): 69-71 80-82 51-53 111-117 63-65 89-92
Piece: 1C 3E 4 15 2 2
Unit: 1 1 2 2 2 2
Rock type: Highly altered basalt Slightly altered basalt Slightly altered basalt Slightly altered basalt Slightly altered basalt Vesicle-rich segregation
Depth (mbsf): 128.89 138.40 141.07 145.01 150.61 151.68
Major oxides (wt%):




SiO2 50.47 50.04 50.62 50.52 51.42 48.46
TiO2 1.74 1.60 1.76 1.71 1.68 3.43
Al2O3 15.35 15.84 15.26 15.23 14.77 11.94
Fe2O3* 14.26 12.13 12.83 12.12 12.06 20.33
MnO 0.07 0.13 0.12 0.16 0.19 0.36
MgO 4.77 6.40 6.65 6.69 6.59 4.46
CaO 7.59 9.00 7.92 9.38 9.02 6.41
Na2O 2.89 2.70 2.96 2.78 2.88 2.90
K2O 1.34 0.38 0.51 0.30 0.32 0.44
P2O5 0.19 0.16 0.21 0.19 0.19 0.45
Total 98.65 98.37 98.82 99.07 99.11 99.17
LOI 1.80 1.40 2.10 0.90 1.10 0.90
Mg# 0.44 0.55 0.55 0.56 0.56 0.34
Trace elements (ppm):




Rb 33 6 8 5 4 14
Ba 61 70 75 86 106 67
Sr 234 237 294 248 244 205
Ce 6 13 17 15 14 8
Nb 6.3 6.5 6.9 7.6 7.3 13.4
Zr 103 95 116 110 112 208
Y 28 29 33 29 31 51
V 258 260 288 284 289 260
Cr 172 176 155 156 142 2
Ni 70 66 66 61 59 26
Cu 27 138 106 127 113 212
Zn 132 100 104 98 101 152

Notes: * = total iron as Fe2O3. LOI = loss on ignition at 1025C for 4 hr. Mg# = MgO/(MgO + FeO), mol%, with FeO calculated (as 80% of total Fe).