Location of the Philippine Sea Geotraverse

Geophysical Center of the Russian Academy of Sciences, Moscow, Russia
World Data Center for Solid Earth Physics
The Geotraverse Project

The Philippine Sea Geotraverse


Table 4.
Chemical Composition of the Rocks From the Philippine Sea Floor

Substance Basalts from
Philippine Basin 		Tholeiitic
basalts
from
Parese
Vela
Basin 1 		Basalts from
Shikoku Basin 2 		Basalts from
Daito Basin 3 		Mariana Trough 4 Kuyshu Palau 5 West Mariana Ridge East Mariana Ridge 6 Forearc Mariana Island Arc 7
site 458 site 459
tholeiites alkali
olivine
basalts 		tholeiites alkali
olivine
basalts 		tholeiites alkali
olivine
basalts 		site
454, 456 		site
453 		basalts andesities
basalts 		basalts andesities
basalts 		andesities basalts andesities
basalts 		andesities marianites boninites basalts basalts andesities
basalts
SiO 2 49.3 48.30 49.22 49.73 47.80 48.78 45.90 49.60 50.63 49.94 54.08 50.29 56.29 64.55 52.48 55.37 59.68 52.90 56.75 52.60 50.65 55.22
TiO 2 0.98 2.34 1.25 1.40 1.55 3.98 3.87 1.14 0.90 1.29 1.19 0.69 0.66 0.85 0.81 1.01 1.05 0.41 0.32 1.12 0.81 0.87
Al 2 O 3 15.15 18.61 15.24 16.02 16.26 13.28 13.60 16.68 17.65 14.15 13.56 18.30 18.12 14.12 18.44 16.33 14.32 14.53 14.70 14.75 16.18 14.80
Fe 2 O 3 1.22 6.47 1.24 9.07 8.38 1.82 1.50 8.14 10.65 12.50 12.28 4.82 3.35 6.73 9.04 9.86 9.78 10.37 9.21 11.65 9.80 10.40
FeO 8.06 2.60 8.24 11.10 9.16 4.82 3.42
MnO 0.16 0.22 0.15 0.15 0.15 0.20 0.24 0.13 0.16 0.23 0.17 0.17 0.15 0.12 0.14 0.15 0.18 0.11 0.12 0.08 0.12 0.14
MgO 8.81 2.29 7.90 6.64 7.64 5.97 6.33 7.98 4.85 5.05 4.43 4.24 2.18 0.80 3.22 3.10 2.21 8.29 6.25 5.21 5.16 4.08
CaO 12.30 6.36 11.97 12.04 8.39 9.45 11.22 11.32 9.18 8.74 8.22 10.12 8.45 5.21 10.36 8.65 5.83 8.34 9.69 6.34 9.36 7.38
Na 2 O 2.44 3.73 2.69 2.67 3.60 2.90 3.05 2.66 2.70 2.94 2.53 2.12 3.27 2.41 2.49 2.72 3.46 2.58 2.54 4.51 3.36 3.55
K 2 O 0.18 3.57 0.22 0.26 1.97 0.60 1.63 0.28 0.78 0.68 0.45 0.75 2.08 1.92 0.93 1.18 1.39 0.86 0.97 1.14 0.48 0.64
P 2 O 5 0.07 1.34 0.09 0.18 0.32 0.41 0.64 0.10 0.17     0.92 0.26 0.56 0.14 0.15 0.21 0.02 0.04 0.14 0.10 0.10
n 12 3 7 113 5 8 9 59 15 71 31 6 4 1 8 14 5 3 2 2 8 5
Total: 98.63 99.56 98.21 99.16 96.06 99.49 99.20 99.85 99.52 95.52 96.91 99.99 100.49 97.27 98.05 98.52 98.11 98.41 100.59 97.04 99.40 100.09
1 Wood et al.,   1981 ;  Ishii,   1981
2 Marsh et al.,   1980 ;   Dick et al.,   1980
3 Marsh et al.,   1980 ;   Wood et al.,   1981
4 Sharaskin,   1982 ;   Wood et al.,   1982
5 Scott,   1981
6 Dixon, Batiza,   1979
7 Natland,   1982 ;   Sharaskin,   1982
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