OFR 5-89 - Alaska Resources Library & Information Services (ARLIS)

TABLE 1. - Major oxide analyses 11 3 of samples of the
Ohio Creek pluton
Rock Tye Biotite Granite I Leucocratic Muscovite Granite
/
Sample | 17 I 22 23 I 25 I 47 I 65 IGranitel-
Major Oxide Analyses (normalized), pct _
SiO2 177.8 176.4 76.6 173.5 174.7 174.1 175.01
A1203 113.5 113.4 113.2 116.0 115.6 115.8 113.16
K20 13.2 13.4 4.2 3.0 13.0 3.3 5.11
Na2O 14.2 13.8 14.0 4.7 15.3 15.2 3.48
CaO 10.17 10.42 I 0.44 10.19 1 0.30 10.29 I 0.58
2/
MgO I .080 I 0.081 I 0.090 | 0.06 I 0.017 | 0.004 | 0.24
3/ 3/
Fe203 I 0.63 I 1.3 I 1.3 7 0.33 F 0.62 I 0.51 I 0.94
FeO 10.24 11.0 IN IN 10.18 |0.40 15.88
MnO |0.033 0.0631 N IN l0.080 0.062 N
P205 I 0.100 I 0.042 I 0.07 I 0.17 I 0.13 I 0.11 I 0.07
TiO2 I 0.015 I 0.05 I 0.01 I 0.015 I 0.009 I 0.005 I 0.11
F 10.011 10.08 I 0.13 12.05 10.009 1 0.13 I N
1/Analyses by X-ray fluorescence.
2/Average biotite alkali granite composition as reported by Nockolds (8).
3/Total iron reported as Fe203.
N - Not analyzed.
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