Table T2. Summary of mineral and glass compositions from fresh lavas sampled on Pual Ridge crest.
Average glass
composition
CaO value
Element oxides (wt%)
 
SiO2
TiO2
Al2O3
FeO
MgO
CaO
MnO
Na2O
K2O
P2O5
Total
Site 1188
72.10 0.44 14.02 2.78 0.27 2.08 0.09 4.80 2.20 0.08 98.88
Site 1189
65.84 0.88 14.91 5.67 0.89 3.84 0.12 4.57 1.68 0.33 98.75
Site 1190
70.90 0.45 14.14 3.54 0.41 2.18 0.08 4.50 2.33 0.08 98.63
Site 1191
69.61 0.66 14.25 4.44 0.45 2.75 0.10 4.60 1.95 0.11 98.92

Plagioclase
compositions
CaO value
Element oxides (wt%)
Ab
An
Or
SiO2
Al2O3
CaO
Na2O
K2O
Fe2O3
SrO
Total
Site 1188 Highest 59.58 24.93 7.23 7.25 0.26 0.38 0.23 99.90 0.35 0.64 0.01

Lowest 57.24 26.57 9.04 6.07 0.20 0.57 0.16 99.88 0.44 0.54 0.01
Site 1189 Highest (rim) 55.35 27.52 10.02 5.63 0.15 0.76
99.43 0.49 0.50 0.01

Lowest (core) 56.18 27.59 10.28 5.24 0.14 0.54
99.97 0.52 0.47 0.01
Site 1190 Highest 57.90 25.95 8.65 6.44 0.22 0.49 0.12 99.81 0.43 0.57 0.01

Lowest 56.32 27.08 9.63 5.85 0.19 0.53 0.15 99.84 0.47 0.52 0.01
Site 1191 Highest 62.81 22.17 6.39 6.09 0.60 1.66 0.10 100.14 0.35 0.61 0.04

Lowest 55.94 27.40 9.87 5.46 0.13 0.60 0.05 99.49 0.50 0.50 0.01

Average
clinopyroxene
composition
CaO value
Element oxides (wt%)
SiO2
TiO2
Al2O3
FeO
MgO
CaO
MnO
Na2O
K2O
Cr2O3
NiO
Total
Site 1188
51.21 0.37 1.31 11.96 12.97 20.52 0.52 0.31 0.00 0.05 0.00 99.22
Site 1190
51.67 0.32 1.29 12.74 13.23 19.51 0.57 0.31 0.02 0.00 0.00 99.67
Site 1191
51.08 0.47 1.55 12.09 13.94 19.45 0.50 0.31 0.00 0.00 0.00 99.40

Average
orthopyroxene
composition
CaO value
Element oxides (wt%)
SiO2
TiO2
Al2O3
FeO
MgO
CaO
MnO
Na2O
K2O
Cr2O3
NiO
Total
Site 1188
51.31 0.21 0.63 26.78 18.46 1.68 1.08 0.05 0.02 0.01 0.00 100.24
Site 1190
51.59 0.24 0.63 26.02 18.74 1.61 1.10 0.06 0.00 0.00 0.00 99.98
Site 1191
51.87 0.28 1.57 20.49 22.80 1.44 0.68 0.05 0.01 0.06 0.07 99.33