Alkaline Rocks and Carbonatites of the World

Funded by HiTech AlkCarb - New geomodels to explore deeper for Hi-Tech critical raw materials in Alkaline rocks and Carbonatites

Bokiesbank

stripes

Occurrence number: 
116-00-050
Country: 
Namibia
Location: 
Longitude: 19.67, Latitude: -28.5

Thin limestone veins and dykes cut across gneisses and amphibolites at this locality. A suite of samples sent to Verwoerd (1993) included ankeritic beforsite from three 45 cm wide dykes. The rock comprises carbonate, pseudomorphs after olivine and biotite, perovskite and magnetite, xenocrysts of K-feldspar and quartz, and chlorite intergrown with fluorite and quartz. Major and trace element chemistry indicates the rocks are carbonatites e.g. 1810 ppm Sr, 328 ppm Ce, 223 ppm Zr and 196 ppm Nb.

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