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

Cerro Aspero

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Occurrence number: 
008-00-006
Country: 
Argentina
Region: 
Catamarco
Location: 
Longitude: -66.42, Latitude: -27.42

A dyke intrudes Precambrian granodiorite on the northern side of Cerro Aspero and consists of amphibole phenocrysts up to 5 mm long, which with matrix amphibole comprises 50% of the rock, with nepheline (20%), pale green pyroxene (10%), magnetite and accessories including an isotropic mineral (?analcime).

References: 
BONORINO, F. G. 1950. Geologia y petrografia de las Hojas 12d (Capillitos) y 13d (Andalgala). Boletin, Argentina Ministerio de Industria y Comercio de la Nacion. Direccion General de Industria Minera, 70‚ 1-100.
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith