Abstract

The fluorine content has been determined for 80 igneous dyke rocks (mostly lamprophyre and lamproid rocks; rarely alkaline and strongly acid ones) from two areas at the eastern margin of the Bohemian Massif. The main carriers of fluorine are biotite and amphibole. The highest concentrations of fluorine are found in alkaline and acid dykes. The fluorine content of dykes is higher than the average of other igneous rocks of similar composition.

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