Table T4. Major and trace element compositions of rocks, Holes 1270A, 1270B, 1270C, and 1270D.
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
209-1270A-
















1R-1, 104–107 1.04 19
Harzburgite 44.55 <0.01 0.75 8.15 44.47 0.06 0.06 0.08 0.01 98.14 13.04 0.25 14.13
1R-2, 34–37 1.80 6
Harzburgite 44.96 <0.01 0.73 9.44 44.62 0.06 0.18 0.06 <0.01 100.05 13.32 0.09 15.82


















209-1270B-
















1R-1, 101–104 1.01 18 I Oxide gabbro 43.01 6.53 12.95 18.52 6.06 0.25 10.86 2.26 0.05 100.48 –0.07 0.08 1.11
4M-2, 54–57 19.54 9 I Oxide gabbro 43.20 4.04 10.76 23.90 7.64 0.31 10.72 1.65 0.04 102.27 –0.11 0.08 1.16
4M-2, 121–124 20.21 18 II Microgabbro 49.15 0.73 15.51 10.09 10.69 0.17 12.28 1.54 0.05 100.22 0.57 0.08 1.21
7R-1, 104–106 32.54 17 VI Microgabbro 46.21 0.88 17.54 13.17 12.53 0.27 7.34 1.57 0.05 99.57 5.42 0.14 7.67
8R-2, 116–118 39.02 13 VII Oxide gabbro 43.68 2.94 10.82 21.11 8.35 0.23 11.60 1.71 0.05 100.49 0.07 0.08 1.10
9R-1, 56–60 41.36 8A VII Oxide gabbro 47.72 1.84 15.82 14.31 6.24 0.17 12.16 2.57 0.07 100.89 0.13 0.09 0.74
10M-1, 23–25 46.03 6 VII Oxide gabbro 45.27 2.64 12.94 20.04 7.95 0.22 11.67 1.81 0.04 102.56 –0.02 0.06 0.93
209-1270C-
















1R-1, 32–36 0.32 7B
Harzburgite 46.85 0.02 0.62 8.67 44.49 0.10 0.04 0.07 0.01 100.87 13.60 0.22 15.91
209-1270D-
















1R-1, 70–74 0.70 16
Harzburgite/Dunite 45.44 0.01 0.48 9.29 41.39 0.13 3.49 0.15 0.02 100.40 14.42 2.21 13.98
3R-1, 63–66 19.53 8B
Harzburgite/vein 49.43 0.13 4.13 7.40 35.06 0.12 3.48 0.27 0.07 100.09 8.51 0.15 9.29
3R-1, 93–97 19.83 11
Harzburgite 46.17 0.01 0.85 8.13 42.70 0.12 0.11 0.08 0.02 98.19 13.40 0.20 15.15
6R-1, 29–32 33.19 4B
Harzburgite 45.99 0.01 0.52 9.29 43.90 0.08 <0.06 0.10 0.01 99.90 13.03 0.38* 12.99*
10R-1, 7–11 51.67 1
Harzburgite 46.31 <0.01 0.33 9.57 42.74 0.10 0.25 0.07 0.01 99.39 12.64 0.16* 12.93*
 
Core, section,
interval (cm)
Depth
(mbsf)
Piece
Unit
Trace elements (ppm)
S
Cr
Ni
Ba
Sr
V
Y
Zr
Sc
Co
209-1270A-












1R-1, 104–107 1.04 19
NA 2824 2001 <39 <5 28.5 <2 4 9 61
1R-2, 34–37 1.80 6
NA 2932 2421 <39 <5 25.1 <2 2 8 70
209-1270B-












1R-1, 101–104 1.01 18 I NA <41 <165 <39 165 644 17 48 64 122
4M-2, 54–57 19.54 9 I NA 95 <165 <39 117 1299 15 30 68 129
4M-2, 121–124 20.21 18 II NA 766 240 <39 159 200 13 34 39 63
7R-1, 104–106 32.54 17 VI NA 742 208 <39 122 241 11 22 36 57
8R-2, 116–118 39.02 13 VII NA <41 <165 <39 112 1540 12 20 68 117
9R-1, 56–60 41.36 8A VII NA <41 <165 <39 172 1006 11 17 54 82
10M-1, 23–25 46.03 6 VII NA 121 <165 <39 138 1335 9 15 58 111
209-1270C-












1R-1, 32–36 0.32 7B
NA 2237 2395 <39 <5 31.2 <2 3 6 110
209-1270D-












1R-1, 70–74 0.70 16
NA 1902 2354 <39 530 45.7 <2 <2 9 99
3R-1, 63–66 19.53 8B
NA 2127 1728 <39 10 31.0 20 96 10 68
3R-1, 93–97 19.83 11
NA 2753 2235 <39 <5 34.5 <2 4 9 112
6R-1, 29–32 33.19 4B
BDL 1601 2595 <39 <5 25.4 <2 3 5 96
10R-1, 7–11 51.67 1
BDL 1752 2945 <39 6 21.5 <2 2 6 121

Notes: * = analyzed using smaller sample sizes for improved H2O calibration. NA = not analyzed, BDL = below detection limit. This table is also available in ASCII.