Alkaline Rocks and Carbonatites of the World

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Asa Ale

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Occurrence number: 
054-00-007
Country: 
Ethiopia
Location: 
Longitude: 41.57, Latitude: 13.5

The Asa Ale granite lies beneath ignimbrites northwest of the Nabro volcano (see Bidu No. 6). Barberi et al. (1971b) report that the granite is similar to the internal part of Affara Dara i.e. contains riebeckite.

Age: 
K-Ar on Asa Ale granite gave 22.0 Ma (Barberi et al., 1972a).
References: 
BARBERI, F., BORSI, S., FERRARA, G., MARINELLI, G., SANTACROCE, R., TAZIEFF, H. and VARET, J. 1972a. Evolution of the Danakil Depression (Afar, Ethiopia) in light of radiometric age determinations. Journal of Geology, 80: 720-9. BARBERI, F., CHEDEVILLE, E., FAURE, H., GIGLIA, G., MARINELLI, G., SANTACROCE, R., TAZIEFF, H. and VARET, J. 1973b. Geology of Northern Afar (Ethiopia) (with a geological map, scale 1:500,000). Revue de Geographie Physique et de Geologie Dynamique, Paris, 15: 443-89.DE ANGELIS, M. 1923. Note di petrografia dancala. Atti della Societa Italiana di Scienze Naturali e dei Museo Civico di Storia Naturale in Milano, 62: 179-200.
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