Alkaline Rocks and Carbonatites of the World

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Occurrence number: 
Kuboos-Bremen and Bremen Garub lines of intrusions
Longitude: 18.68, Latitude: -27.67

About 10 km south of Mickberg (No. 116-00-047) two small plugs form low rounded hills in a sandy flat (Verwoerd, 1993). The northernmost plug consists of gneissic fragments of country rock set in a gritty matrix with a variable brown-weathering content of ankerite. Beforsite dykes cut the breccia and extend into the country rock leucocratic gneisses. The second plug is similar but with less ankerite in the matrix. As well as beforsite dykes there is a 2 m wide calcite carbonatite dyke which at its southern end contains patches of galena, chalcopyrite, limonite, malachite, chrysocolla and quartz.

VERWOERD, W.J. 1993. Update on carbonatites of South Africa and Namibia. South African Journal of Geology, 96: 75-96.
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith