Alkaline Rocks and Carbonatites of the World

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Paramillo De Uspallata

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Occurrence number: 
008-00-007
Country: 
Argentina
Region: 
Mendoza
Location: 
Longitude: -69.4, Latitude: -32.72

Alkaline rocks appear to be widespread in the 'Precordillera' (approximately between 39°-33°30'S and 68-69°W) but detailed distributions and descriptions are not available. Phonolite, with aegirine-augite and interstitial nepheline, sodic trachyte, bostonite, tephrite, teschenite, pegmatitic syenite with aegirine and nordmarkite have been described, but appear to be particularly concentrated in the Paramillo de Uspallata.

References: 
QUARTINO, B. J. & LLAMBIAS, E. 1964. Synopsis on rocks with alkaline affinities in the Argentine Republic. International Geological Congress, Report of the 22nd Session, India, 16 1-12. STIEGLITZ, O. 1914. Contribucion a la petrografia de la Precordillera y del Pie de Palo. Boletin, Serie B (Geologia), Direccion General de Minas, Geologia e Hidrologia, 10‚ 1-97
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith