Alkaline Rocks and Carbonatites of the World

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Elonga

stripes

Occurrence number: 
005-00-015
Country: 
Angola
Location: 
Longitude: 15.02, Latitude: -12.32

Nepheline syenite has been described from Monte Elonga and consists of 75% alkali feldspar, 11% nepheline, 8% brown hornblende, a little biotite and accessories including augite and aegirine. Rocks described as nepheline monzonite form dykes of which two analyses are available.

References: 
ANDRADE, M. de 1954. Contribution à l'étude des roches alcalines d'Angola (note preliminaire). 19th International Geological Congress, Algiers. Comptes Rendus, 19: 241-52.
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