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The Coranzul&#237; is a large Upper Miocene volcanic complex located on a NE-SW and NW-SE regional faults intersection, at 66&#194;&#186; 15' W 23&#194;&#186; S, in the Northwest of Argentina in Jujuy province. It corresponds to one of four large volcanic complexes which represent the end of Transversal Volcanic Chaines in La Puna Argentina in the Central Andes. The volcanic activity was characterized by at least four separate ignimbrite eruptions which produced four different ignimbrite sheets. These are well welded, very crystal-rich, lithie poor ignimbrites and have a moderate to high pumice content. The total volume of the Coranzuli ignimbrites exeededs 650 Km<sup>3</sup>. Preliminary data indicate that the eruption oeeurred from a homogeneous magmatic chamber without zoning. The emplacement characteristics of the ignimbrites and the lack of basal or interbedded plinian fall deposits suggest that the eruptions developed quickly to massive proportions.  El Coranzuli es uno de los grandes complejos volc&#225;nicos que representan el remate final de las Cadenas Volc&#225;nicas Transversales de la Puna Argentina, en los Andes Centrales. Se trata de un complejo volc&#225;nico del Mioceno superior situado a los 66&#194;&#186; 15' W 23&#194;&#186; S en el NW de Argentina en la provincia de Jujuy, en la intersecci&#243;n entre dos fallas regionales de direcci&#243;n NE-SW y NW-SE, respectivamente. La actividad eruptiva se caracteriz&#243; por la existencia de, al menos, cuatro erupciones ignimbr&#237;ticas que produjeron cuatro diferentes mantos ignimbr&#237;ticos. Se trata de ignimbritas bien soldadas, muy ricas en cristales, pobre en fragmentos l&#237;ticos y que presentan un contenido en fragmentos pum&#237;ticos de moderado a alto. El volumen total que representan estas ignimbritas supera los 650 km<sup>3</sup>. Los datos preliminares indican que el magma juvenil deriva de una c&#225;mara magm&#225;tica homog&#233;nea no zonada. Las caracter&#237;sticas de emplazamiento de estas ignimbritas, as&#237; como la falta de dep&#243;sitos plinianos de ca&#237;da en la base o intercalados entre las ignimbritas sugieren que las erupeiones se desarrollaron r&#225;pidamente en unas proporciones masivas

Las ignimbritas del complejo volcánico Coranzuli (Puna Argentina-Andes Centrales)