A Note on the Occurrence of Potassium-Rich Trachytes in the Kaiserstuhl Carbonatite Complex, West Germany

D. S. Sutherland

Department of Geology, The University, Leicester

Summary: Specimens of trachyte obtained on a recent visit to the Kaiserstuhl are compared with similar potassium-rich rocks from carbonatite complexes in Africa. Two new chemical analyses are given, in which the values for alkalis (Na₂O 1·21, K₂O 12·63; Na₂O 0·92, K₂O 12·18 %) are of interest.

Mineralogical Magazine; September 1967 v. 36; no. 279; p. 334-341; DOI: 10.1180/minmag.1967.036.279.05
© 1967, The Mineralogical Society
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