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Abra Granada information


Abra Granada
CountryBolivia
RegionPuna de Atacama
Age9.8-7.8 Ma
Last eruption7.9-5.0 mya

22°32′S 66°32′W / 22.533°S 66.533°W / -22.533; -66.533Abra 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] Individual volcanic centres are known as Cerro Caucani, Cerro Granada and Cerro Solterío. The Pirquitas mine is part of the volcanic complex.[3]

Other peraluminous rocks were erupted 10 mya.[4] The complex is the likely source of the Granada Ignimbrite. The ignimbrite reaches its maximum thickness in the complex.[5]

  1. ^ Warwick S. Board; R. Bruce Kennedy; 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. ^ Peralta Arnold, Y.; Cabassi, J.; Tassi, F.; Caffe, P. J.; Vaselli, O. (15 May 2017). "Fluid geochemistry of a deep-seated geothermal resource in the Puna plateau (Jujuy Province, Argentina)". Journal of Volcanology and Geothermal Research. 338: 123. doi:10.1016/j.jvolgeores.2017.03.030. hdl:2158/1087501. ISSN 0377-0273.
  4. ^ "GEOQUÍMICA, FUENTES Y EVOLUCIÓN DEL MAGMATISMO NEÓGENO DE LA PUNA NORTE" (Press release) (in Spanish). RELATORIO DEL XVII CONGRESO GEOLÓGICO ARGENTIN. July 2008.
  5. ^ 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 (in Spanish). Argentina: Latinmag Letters. Retrieved August 22, 2015.

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