Table 6.A4 – Major Element Analyses of Andesite, Granodiorite, Coarse-grained Granite and Medium-grained Granite

Element Andesite
-
Tsing Lung Tau
(2241 2474)
-
HK 6047		 Granodioorite
-
Shek Kong
(2946 3245)
-
HK 3381		 Coarse-grained Granite
-
Tuen Mun
(1610 2760)
-
HK 2416		 Coarse-grained Granite
-
Tuen Mun
(1649 2670)
-
HK 2383		 Medium-grained Granite
-
Ha Pak Nai
(1251 3170)
-
HK 3959		 Medium-grained Granite
-
Tai Lam
(2010 2431)
-
HK 4327
SiO2 61.29 68.67 71.50 75.60 75.76 76.03
TiO2 0.82 0.58 0.26 0.09 0.12 0.07
Al2O3 17.37 14.36 13.75 12.68 12.83 12.67
Fe2O3 1.75 1.38 0.67 0.56 0.45 0.26
FeO 4.16 2.82 1.65 1.10 1.12 0.91
MnO 0.08 0.07 0.04 0.04 0.04 0.04
MgO 3.10 1.16 0.32 0.16 0.13 0.06
CaO 1.33 3.21 1.79 1.05 0.89 0.88
Na2O 3.10 3.11 2.87 3.39 3.14 2.93
K2O 4.00 3.97 5.61 5.00 5.06 5.22
H2O+ 3.26 1.10 0.35 0.17 0.69 0.43
H2O- 0.15 0.10 0.13 0.35 0.03 0.05
P2O5 0.46 0.13 0.05 0.02 0.01 0.01
Total 100.87 100.66 98.99 100.23 100.27 99.83