Alkaline Rocks and Carbonatites of the World

Setup during HiTech AlkCarb: an online database of alkaline rock and carbonatite occurrences

Elonga

stripes

Occurrence number: 
005-00-015
Country: 
Angola
Location: 
Longitude: 15.02, Latitude: -12.32
Carbonatite: 
No

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