Alkaline Rocks and Carbonatites of the World

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

Camagüey

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Occurrence number: 
041-00-001
Country: 
Cuba
Region: 
Camagüey
Location: 
Longitude: -7731, Latitude: 21.12
Carbonatite: 
No

The Camagüey province of central Cuba plays host to four granitoid formations of a Cretaceous volcanic arc. One of these four, the Sienitic Formation of the Sibanicú- Las Tunas massif, is host to an alkaline syenite. The main facies consists of a potassic, coarse-grained biotite-hornblende syenite with minerals including orthoclase (75-80%) oligoclase (8-10%), hornblende and biotite (7-15%), and accessory magnetite, sphene, apatite, zircon, baddeleyite, and molybdenite (2-3%). Arfvedsonite is found as a rim around primary hornblende, and euhedral baddeleyite is believed to have formed subsequent to zircon suggesting a late stage subsaturation of silica in the magma. Baddeleyite analysis and whole rock major element data can be found in González et al. (2013).

Age: 
Cretaceous (Gonzalez et al., 2013)
References: 
GONZÁLEZ, I.M., RODRÍGUEZ, M.P. & LA ROSA, M.T., 2013. Acerca de la presencia de arfedsonita y baddeleyita en rocas sieniticas de Camagüey, Cuba. X Congreso Cubano Geología, Mineralogía y Petrología de Minerales Metálicos
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