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Table T10. Chemical composition of samples from Hole 735B. (Continued on next 12 pages.)

  118-735B   176-735B
Hole: B B B B B B B B

B B B B B B B
Core: 74 78 79 82 85 86 87 88   90 90 90 91 91 92 93
Type: R R R R R R R N

R R R R R R R
Section: 6 1 7 1 3 4 6 1   1 4 7 1 3 1 3
Top (cm): 45 114 115 13 47 78 98 48   115 41 55 105 92 25 85
Bottom (cm): 51 118 118 16 54 81 102 51   121 47 62 114 100 30 92
Piece: 4A 5A 10 2A 1F 4B 13 2B

2 1B 1B 3B 1D 4 1E
Depth (mbsf): 382.2 410.5 423.9 443.1 474.7 486.1 499.1 500.5   508.9 512.0 515.8 518.9 522.5 527.5 534.7
Li_Int:         460 474 491a 495   497a 497a 501 504 506 509 510
Rock type: OxGa OxGa OxGa OxGa OxGa OlGa OlGa Troc

Troc TrocGa Troc Troc altGa Ga Ga
SiO2 (wt%): 52.01 48.83 46.48 49.44 46.86 51.53 49.64 46.86   48.10 48.42 48.38 43.82 44.48 54.26 52.11
TiO2 (wt%): 1.60 2.26 3.62 2.66 4.91 0.38 0.15 0.09   0.11 0.10 0.16 0.15 0.19 0.60 0.50
Al2O3 (wt%): 14.82 14.05 12.79 13.30 13.70 16.33 19.21 20.45   22.05 18.01 19.72 13.37 22.89 16.46 15.75
Fe2O3 (wt%): 12.24 14.45 19.01 16.82 17.62 7.62 5.48 6.01   5.35 5.64 5.81 9.41 6.91 6.46 7.82
MnO (wt%): 0.21 0.22 0.30 0.26 0.25 0.13 0.10 0.09   0.09 0.09 0.10 0.14 0.11 0.11 0.14
MgO (wt%): 6.43 7.07 4.87 4.34 4.66 9.90 11.37 13.50   11.39 14.77 12.17 24.03 4.98 7.05 8.34
CaO (wt%): 10.25 10.90 9.59 9.27 9.04 12.67 12.34 10.24   11.27 11.83 11.76 7.94 18.96 12.72 13.09
Na2O (wt%): 3.65 3.16 3.56 3.99 3.67 2.85 2.43 2.14   2.40 1.67 2.11 1.08 2.62 3.86 3.01
K2O (wt%): 0.07 0.10 0.07 0.13 0.05 0.05 0.04 0.06   0.01 0.20 0.03 0.01 0.21 0.05 0.06
P2O5 (wt%): 0.09 0.43 0.57 0.49 0.11 0.01 0.01 0.01   0.01 0.00 0.01 0.01 0.13 0.02 0.02
Total (wt%): 101.37 101.47 100.86 100.70 100.87 101.47 100.77 99.45   100.76 100.72 100.24 99.95 101.47 101.58 100.82
LOI: 0.33 0.04 0.44 0.28 -0.18 -0.61 -0.87 -1.30   -0.60 -2.22 -0.57 -1.36 -9.24 -1.68 -0.75
FeO(tit): 8.31 10.03 12.63 11.01 11.62 5.96 ND 5.10   4.47 4.54 5.13 8.00 1.42 4.66 5.34
%Fe2+: 75 77 74 73 73 87 ND 96   93 91 99 96 25 82 77
Mg-value: 0.58 0.56 0.41 0.41 0.42 0.75 ND 0.82   0.82 0.85 0.81 0.84 0.85 0.73 0.73
Mg#: 0.550 0.533 0.374 0.376 0.381 0.752 0.829 0.840   0.832 0.859 0.830 0.856 0.627 0.718 0.713
Ca#: 0.608 0.656 0.598 0.562 0.576 0.711 0.737 0.726   0.722 0.797 0.755 0.802 0.800 0.645 0.706
V (ppm): 311 180 220 188 504 165 81 30   38 71 76 48 80 228 209
Cr (ppm): 168 417 0 14 0 283 820 194   228 1202 251 742 40 7 27
Ni (ppm): 59 101 64 42 35 114 287 410   329 413 294 770 276 58 75
Cu (ppm): 54 108 119 70 107 20 22 80   86 105 46 60 70 10 58
Zn (ppm): 87 117 166 161 99 46 34 39   33 47 39 52 56 24 47
Rb (ppm): 2 3 2 3 2 2 2 1   1 2 2 2 5 1 1
Sr (ppm): 171 151 164 158 159 166 168 175   184 135 168 109 219 229 166
Y (ppm): 30 59 71 95 30 11 10 4   5 6 6 5 6 15 14
Zr (ppm): 81 92 89 250 93 25 29 19   21 21 22 15 28 41 33
Nb (ppm): 1 5 7 6 3 0 0 0   1 1 0 0 0 0 0

















Notes: Li_Int = lithologic interval (see "Igneous Petrology"). Rock type = rock names assigned on the basis of modal data determined by point counting. Troc = troctolite; TrocGa = troctolitic gabbro; OlGa = olivine gabbro; Ga = gabbro; DiOlGa = disseminated oxide olivine gabbro; OxGa = oxide gabbro; LeuGa = leucocratic gabbro; OpxOxGa = orthopyroxene-bearing oxide gabbro; altGa = heavily altered gabbro; felsic = diorite or plagiogranite; mixed = intimately mixed felsic and mafic components. Major elements determined on ignited powder; %FeO(tit) and minor and trace elements on powder dried at 110°C. Concentration units: weight percent for major element oxides, LOI and FeO(tit); parts per million for minor and trace elements. LOI = weight loss on ignition; negative values = loss of weight; positive values = gain of weight, i.e., oxygen uptake > volatile loss. FeO(tit) = weight percent ferrous iron oxide determined by redox titration. %Fe2+ = percentage of total iron present as ferrous iron, calculated from FeO(tit) and Fe2O3 determined by X-ray fluorescence. Mg-value = Mg-number, calculated from %Fe2+. Mg# = Mg-number, calculated value for ferrous iron set equal to 85% of total iron. Ca# = (Ca/Ca+Na) molar; ND = not determined.

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