Chemistry of peralkaline phonolite dykes
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R. C. O. Gill
📂
Article
📅
1972
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Springer
🌐
English
⚖ 894 KB
The chemical variation observed in a suite of fifteen, aphyrie peralkaline phonolite dykes of mid-Gardar age from the vicinity of the Gronnedal-Ika alkaline complex in southwest Greenland is discussed. From relationships in the system 5Ta20-K~O-A120a-SiO 2 it is argued that the members of the series