Table T11.
X-ray fluorescence analyses of major and trace elements for Site 1139 igneous units.Hole: | 1139A | 1139A | 1139A | 1139A | 1139A | 1139A | 1139A | 1139A | 1139A |
---|---|---|---|---|---|---|---|---|---|
Core, section: | 51R-1 | 56R-3 | 57R-1 | 60R-2 | 61R-1 | 62R-2 | 64R-1 | 64R-4 | 65R-2 |
Interval (cm): | 0-3 | 92-95 | 124-127 | 114-119 | 78-81 | 110-112 | 81-84 | 78-82 | 15-19 |
Piece: | 21 | 15 | 1F | 1 | 13B | 3F | 1A | ||
Unit: | 1 | 3 | 4 | 5 | 5 | 6 | 7 | 8 | 9 |
Rock type: | Rhyolite | Highly altered, crystal vitric tuff-breccia | Sanidine-quartz phyric rhyolite | Feldspar-phyric trachyte | Feldspar-phyric trachyte | Aphyric
trachy basalt |
Aphyric
basaltic trachyandesite |
Aphyric trachybasalt | Aphyric trachybasalt |
Depth (mbsf): | 479.5 | 531.06 | 538.14 | 568.22 | 575.98 | 586.83 | 605.01 | 609.42 | 615.35 |
Major element oxides (wt%): | |||||||||
SiO2 | 73.45 | 69.51 | 79.58 | 67.10 | 66.56 | 50.57 | 53.59 | 49.09 | 50.17 |
TiO2 | 0.41 | 0.53 | 0.34 | 0.56 | 0.57 | 3.15 | 2.67 | 3.89 | 4.18 |
Al2O3 | 10.24 | 15.92 | 8.36 | 16.30 | 16.38 | 18.62 | 17.45 | 14.89 | 16.64 |
Fe2O3 | 6.03 | 5.24 | 3.67 | 5.36 | 4.37 | 16.99 | 10.60 | 14.14 | 13.43 |
MnO | 0.07 | 0.06 | 0.06 | 0.22 | 0.27 | 0.16 | 0.30 | 0.26 | 0.28 |
MgO | 0.10 | 4.21 | 0 | 0.05 | 0.08 | 1.36 | 1.09 | 4.33 | 2.34 |
CaO | 0 | 0 | 0 | 0 | 0 | 2.55 | 5.85 | 7.67 | 6.41 |
Na2O | 3.32 | 2.75 | 2.58 | 4.91 | 4.31 | 2.27 | 4.36 | 3.17 | 3.67 |
K2O | 6.50 | 2.04 | 4.34 | 6.02 | 5.98 | 4.13 | 3.68 | 2.31 | 2.75 |
P2O5 | 0.03 | 0.00 | 0.00 | 0.01 | 0.00 | 1.50 | 1.09 | 1.05 | 1.44 |
Total | 100.14 | 100.24 | 98.91 | 100.50 | 98.50 | 101.29 | 100.66 | 100.77 | 101.28 |
Mg#* | 0.02 | 0.53 | 0 | 0.01 | 0.02 | 0.10 | 0.12 | 0.30 | 0.19 |
LOI** | 0.93 | 5.66 | 0.17 | 1.73 | 2.04 | 3.73 | 4.38 | 2.69 | 4.38 |
CO2 | 1.2 | 7.3 | 0.7 | 2.6 | 1.8 | 4.2 | 5.8 | 3.5 | 5.3 |
H2O | 1.1 | 7.2 | 0.6 | 0.6 | 0.0 | 4.2 | 1.4 | 1.9 | 1.7 |
Trace elements (ppm): | |||||||||
Rb | 221 | 22 | 139 | 93 | 70 | 47 | 47 | 34 | 41 |
Ba | 49 | 40 | 66 | 79 | 75 | 791 | 1570 | 757 | 923 |
Sr | 7 | 34 | 0 | 4 | 3 | 113 | 451 | 421 | 466 |
Nb | 259 | 311 | 142 | 107 | 108 | 49 | 45 | 36 | 41 |
Zr | 1678 | 213 | 903 | 629 | 388 | 343 | 367 | 292 | 332 |
Y | 106 | 59 | 42 | 58 | 56 | 45 | 45 | 38 | 40 |
V | 98 | 14 | 19 | 19 | 19 | 99 | 138 | 350 | 338 |
Cr | 23 | 18 | 25 | 24 | 26 | 13 | 24 | 21 | 9 |
Ni | 11 | 2 | 1 | 3 | 3 | 3 | 4 | 12 | 7 |
Cu | |||||||||
Zn | 252 | 555 | 105 | 146 | 366 | 212 | 125 | 119 | 127 |
Normative mineralogy: | |||||||||
Q | 31.0 | 36.7 | 47.4 | 12.9 | 16.7 | 11.6 | 0.3 | 1.3 | |
Or | 38.5 | 12.0 | 26.0 | 35.5 | 35.9 | 24.4 | 21.7 | 13.7 | 16.2 |
Ab | 16.6 | 23.7 | 19.1 | 41.3 | 37.1 | 19.2 | 36.9 | 26.9 | 31.1 |
An | 2.8 | 17.2 | 19.7 | 20.7 | |||||
Corundum | 9.1 | 1.7 | 2.9 | 9.4 | |||||
Nepheline | |||||||||
Leucite | |||||||||
Acmite | 3.5 | 2.2 | |||||||
Na Metasilicate | 1.8 | 0.2 | |||||||
Wo (Di) | 1.9 | 4.8 | 0.7 | ||||||
En (Di) | 0.5 | 2.4 | 0.3 | ||||||
Fs (Di) | 1.6 | 2.3 | 0.4 | ||||||
En (Hy) | 0.2 | 10.6 | 0.2 | 0.2 | 3.4 | 2.2 | 7.8 | 5.5 | |
Fs (Hy) | 7.4 | 5.3 | 4.5 | 5.7 | 4.7 | 14.8 | 6.9 | 7.5 | 8.7 |
Ol (Fo) | 0.4 | ||||||||
Ol (Fa) | 0.5 | ||||||||
Ilmenite | 0.8 | 1.0 | 0.6 | 1.1 | 1.1 | 6.0 | 5.1 | 7.4 | 7.9 |
Magnetite | 1.5 | 1.6 | 1.3 | 4.9 | 3.1 | 4.1 | 3.9 | ||
Apatite | 3.3 | 2.4 | 2.3 | 3.1 | |||||
Total: | 99.9 | 99.9 | 99.9 | 99.9 | 99.9 | 99.8 | 99.8 | 99.8 | 99.8 |