Abra Granada

Coordinates: 22°32′S 66°32′W / 22.533°S 66.533°WAbra Granada is a volcanic complex in the Puna de Atacama in Bolivia. It is located approximately 45 kilometres (28 mi) north of Pirquitas and is composed from a lava dome, lavas and dacitic ignimbrites centering on Cerro Granada (5,700 metres (18,700 ft)) and are dated 9.8-7.8 Ma.^[1] Deposits erupted 7.9-5.0 mya by this volcano overlie the older Granada ignimbrite.^[2] Other peraluminous rocks were erupted 10 mya.^[3] The complex is the likely source of the Granada Ignimbrite. The ignimbrite reaches its maximum thickness in the complex.^[4]

References

1. Dr. Warwick S. Board, R. Bruce Kennedy and Trevor J. Yeomans (December 23, 2011). NI 43-101 Technical Report on the Pirquitas Mine, Jujuy Province, Argentina. (PDF) (Report). Silver Standard Resources Inc. p. 55. Retrieved August 22, 2015.
2. Caffe, P.J.; Soler, M.M.; Coira, B.L.; Onoe, A.T.; Cordani, U.G. (2008). "The Granada ignimbrite: A compound pyroclastic unit and its relationship with Upper Miocene caldera volcanism in the northern Puna". Journal of South American Earth Sciences 25 (4): 464–484. doi:10.1016/j.jsames.2007.10.004. ISSN 0895-9811.
3. "GEOQUÍMICA, FUENTES Y EVOLUCIÓN DEL MAGMATISMO NEÓGENO DE LA PUNA NORTE" (Press release) (in Spanish). RELATORIO DEL XVII CONGRESO GEOLÓGICO ARGENTIN. July 2008.
4. Silvia E. Singer, Rubén Somoza, Juan F. A. Vilas (2011). "APLICACIÓN DE LA ANISOTROPÍA DE SUSCEPTIBILIDAD MAGNÉTICA AL RECONOCIMIENTO DE DEPÓSITOS VO LCANICLÁSTICOS EN EL COMPLEJO VOLCÁNICO ALTIPLANO - PUNA, ANDES CENTRALES, ARGENTINA" (PDF). Tandil. Argentina language=es: Latinmag Letters. Retrieved August 22, 2015.

Further reading

Caffe, P.J.; Soler, M.M.; Coira, B.L.; Onoe, A.T.; Cordani, U.G. (2008). "The Granada ignimbrite: A compound pyroclastic unit and its relationship with Upper Miocene caldera volcanism in the northern Puna". Journal of South American Earth Sciences 25 (4): 464–484. doi:10.1016/j.jsames.2007.10.004. ISSN 0895-9811.