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

San Miguel De Tucuman Area

stripes

Occurrence number: 
008-00-005
Country: 
Argentina
Region: 
Salta and Tucuman
Location: 
Longitude: -65.25, Latitude: -26.67

In the area north of San Miguel de Tucuman is a province of dykes, sills and chimneys predominantly of alkali olivine basalts but containing abundant zeolite and some nepheline. Leucite tephrites are found at a number of localities (Stappenbeck, 1921, geological map) and biotite-analcime monchiquites, trachytephrites, essexites and limburgites have also been described. For a brief review see Quartino and Llambias (1964, p. 7).

Age: 
Probably late Cretaceous or early Tertiary (Quartino and Llambias, 1964).
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. STAPPENBECK, R. 1921. Estudios geologicos e lidrogeologicos en la Zona Subandina de las Provincias de Salta y Tucuman. Anales del Ministerio de Agricultura de la Nacion, Seccion Geologia, Mineralogia y Mineria, XIV (5)‚ 1-136.
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith