Table T4. Major and trace element compositions of rocks, Hole 1272A.
Core, section, interval (cm)
Depth (mbsf)
Piece
Unit
Lithology
Major element oxides (wt%)
LOI
Volatiles (wt%)
SiO2
TiO2
Al2O3
Fe2O3
MgO
MnO
CaO
Na2O
K2O
Total
CO2
H2O
209-1272A-
















1R-1, 7–11 0.07 2 I Harzburgite 40.43 0.02 0.77 8.21 38.70 0.14 9.65 0.12 0.01 98.04 17.95 7.33 14.87
1R-1, 42–45 0.42 7 I Gabbronorite 52.08 1.18 14.96 10.28 8.77 0.16 10.92 2.62 0.15 101.11 1.27 0.08 2.21
2R-1, 61–63 13.51 9 I Dunite 40.34 0.01 0.12 7.62 40.45 0.13 12.19 0.10 <0.01 100.94 18.89 9.31 14.02
3R-1, 110–114 19.00 9 I Diabase 51.28 1.48 15.13 9.52 6.81 0.15 11.28 2.69 0.57 98.90 0.49 0.11 1.06
4R-1, 82–85 23.22 14 I Gabbronorite 52.61 1.81 15.02 10.34 6.12 0.19 10.63 3.15 0.34 100.21 0.41 0.16 0.91
7R-1, 98–102 37.88 15 I Basalt 50.32 1.44 15.13 10.04 7.45 0.15 10.85 2.84 0.45 98.67 1.18 0.58 1.66
7R-1, 109–113 37.99 17 I Basalt 51.74 1.48 15.69 9.73 7.41 0.15 11.15 2.66 0.64 100.66 0.95 0.11 1.31
12R-1, 73–76 56.73 8 II Harzburgite 45.70 0.02 0.65 8.21 48.26 0.10 <0.06 0.18 <0.01 103.16 15.28 NA NA
13R-1, 93–98 61.63 15 II Harzburgite 41.41 0.02 0.57 8.03 47.27 0.11 <0.06 0.06 <0.01 97.46 16.64 NA NA
16R-1, 135–137 76.35 22 II Harzburgite 43.12 0.01 0.78 8.21 46.53 0.11 <0.06 0.07 0.01 98.83 14.97 0.30 15.51
18R-1, 46–48 85.06 6 II Harzburgite 43.31 0.01 0.69 8.07 46.18 0.12 0.15 0.04 <0.01 98.58 15.35 0.35 15.40
19R-2, 24–27 91.04 3B II Harzburgite 43.27 0.01 0.60 7.94 45.40 0.10 <0.06 0.06 <0.01 97.42 15.61 0.33 15.58
21R-1, 50–52 99.40 4 II Harzburgite 42.56 0.01 0.64 8.19 45.73 0.10 <0.06 0.07 <0.01 97.31 15.25 0.27 15.54
23R-1, 12–14 108.62 2 II Dunite 40.13 0.01 0.12 8.81 48.14 0.11 0.07 0.09 <0.01 97.49 16.35 0.24 15.58
24R-1, 73–77 114.23 11 II Harzburgite 42.93 0.01 0.76 7.94 45.51 0.12 <0.06 0.06 <0.01 97.38 15.45 0.36 15.38
25R-1, 124–126 119.24 15 II Harzburgite 43.36 0.01 0.62 8.05 45.49 0.12 0.19 0.06 0.01 97.91 14.78 0.34 15.03
26R-1, 80–83 123.80 4 II Harzburgite 44.27 0.01 0.62 8.22 46.61 0.12 <0.06 0.07 0.01 99.96 14.79 0.24 15.23
Core, section, interval (cm)
Depth (mbsf)
Piece
Unit
Lithology
Trace elements (ppm)
S
Cr
Ni
Ba
Sr
V
Y
Zr
Sc
Co















209-1272A-













1R-1, 7–11 0.07 2 I Harzburgite <350 4885 2987 <39 1786 47 <2 2 6 92
1R-1, 42–45 0.42 7 I Gabbronorite 681 338 187 <39 136 260 24 87 38 41
2R-1, 61–63 13.51 9 I Dunite <350 3431 3293 39 2148 13 <2 3 4 113
3R-1, 110–114 19.00 9 I Diabase <350 237 144 109 223 257 27 126 37 55
4R-1, 82–85 23.22 14 I Gabbronorite 856 14 35 107 230 310 29 150 40 44
7R-1, 98–102 37.88 15 I Basalt <350 257 124 74 204 247 27 125 37 46
7R-1, 109–113 37.99 17 I Basalt 496 273 160 114 221 254 26 127 36 61
12R-1, 73–76 56.73 8 II Harzburgite NA 2153 2426 <39 <5 27 <2 3 7 127
13R-1, 93–98 61.63 15 II Harzburgite NA 2460 2581 <39 <5 24 <2 <2 6 105
16R-1, 135–137 76.35 22 II Harzburgite <350 3247 2690 <39 <5 32 <2 <2 7 94
18R-1, 46–48 85.06 6 II Harzburgite <350 2352 2627 <39 <5 28 <2 <2 8 97
19R-2, 24–27 91.04 3B II Harzburgite <350 1926 2724 <39 <5 23 <2 3 9 90
21R-1, 50–52 99.40 4 II Harzburgite 429 2553 2951 <39 <5 28 <2 5 8 79
23R-1, 12–14 108.62 2 II Dunite 1137 720 3542 <39 <5 12 <2 4 5 141
24R-1, 73–77 114.23 11 II Harzburgite <350 3353 2919 <39 <5 28 <2 <2 8 89
25R-1, 124–126 119.24 15 II Harzburgite <350 2374 3036 <39 <5 26 <2 3 8 100
26R-1, 80–83 123.80 4 II Harzburgite <350 2619 2993 <39 <5 27 <2 3 8 101

Notes: Some low major element totals are due to the high concentrations of Cr and Ni that are probably not trace elements in these rocks. NA = not analyzed. This table is also available in ASCII.