Initial Reports Volume 187 Chapter 4, Table T3. Glass and whole-rock major and trace element compositions of basalts, Hole 1153A. Notes: Glass samples were rerun later in the course of Leg 187. Only the averages of these rerun analyses are plotted. * = SiO2 by difference for ICP-AES; LOI = loss on ignition. Hole 1153A Core, section: 7W-4 7W-4 7W-4 7W-4 7W-4 7W-4 7W-4 8R-1 8R-1 8R-1 Interval (cm): 46-50 46-50 46-50 46-50 60-65 60-65 60-65 101-102 101-102 101-102 Depth (mbsf): 247.5 247.5 247.5 247.5 247.5 247.5 247.5 268.1 268.1 268.1 Piece: 3 3 3 3 5 5 5 14 14 14 Unit: 1 1 1 1 1 1 1 1 1 1 Analysis: XRF XRF ICP ICP ICP ICP, rerun ICP, rerun ICP ICP, rerun ICP, rerun Rock type: Aphyric basalt Glass Glass Glass Glass Glass Glass Major element (wt%) SiO2 48.29 46.86 51.80 50.01 47.97* 51.41 52.30 46.90* 51.21 50.87 TiO2 2.08 2.05 2.08 1.97 2.07 2.09 2.06 1.93 1.94 1.96 Al2O3 14.87 14.59 14.24 14.60 14.74 14.84 14.73 16.07 15.07 14.95 Fe2O3 12.03 11.71 12.89 12.14 12.61 12.21 12.19 12.24 12.11 12.13 MnO 0.19 0.19 0.20 0.20 0.20 0.19 0.19 0.20 0.19 0.19 MgO 6.54 6.34 7.09 6.74 8.08 7.90 7.93 8.41 8.14 8.24 CaO 10.77 10.53 10.59 10.74 11.03 10.73 10.75 11.09 11.11 10.93 Na2O 2.64 2.64 2.86 2.80 2.99 2.74 2.79 2.82 2.43 2.70 K2O 0.22 0.22 0.18 0.19 0.11 0.09 0.08 0.13 0.13 0.13 P2O5 0.20 0.19 0.22 0.22 0.20 0.17 0.19 0.22 0.16 0.18 LOI 0.89 0.89 CO2 H2O Total: 98.72 96.21 102.16 99.61 100.00 102.35 103.22 100.00 102.50 102.29 Trace element (ppm) Nb 6 Zr 143 144 142 171 153 146 133 109 124 Y 47 48 48 48 52 47 44 39 42 Sr 114 106 109 113 96 99 109 114 112 Rb 2 Zn 104 Cu 60 Ni 128 111 109 118 108 117 121 132 119 Cr 324 269 280 270 261 265 287 276 270 V 355 Ce 38 Ba 11 11 8 5 5 8 9 8 Sc 38 40 40 39 32 36