Alkaline Rocks and Carbonatites of the World

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

Cerro Balmaceda

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Occurrence number: 
034-00-002
Country: 
Chile
Region: 
Magallanes
Location: 
Longitude: -73.18, Latitude: -51.42
Carbonatite: 
No

Syenites comprising orthoclase, albite-oligoclase, aegirine- augite, arfvedsonite and a little quartz, and nordmarkites including quartz, fayalite and aegirine-augite are described from the Cerro Balmaceda vicinity by Quensel (1912, p. 36). Chemical analyses are given but there are few details of field relationships.

Age: 
Probably Upper Cretaceous (Quartino and Llambias, 1964, p. 4).
References: 

QUARTINO, B.J. and LLAMBIAS, E. 1964. Synopsis on rocks with alkaline affinities in the Argentine Republic. Report of the 22nd Session, International Geological Congress, 16: 1-12.
QUENSEL, P.D. 1912. Geologisch-petrographische Studien in der Patagonischen Cordillera. Bulletin of the Geological Institution of the University of Upsala, 11: 1-114

Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith