New 40Ar/39Ar alunite ages from the Colquijirca district, Peru: evidence of a long period of magmatic SO2 degassing during formation of epithermal Au–Ag and Cordilleran polymetallic ores

Author： Bendezú Ronner   Page Laurence   Spikings Richard   Pecskay Zoltan   Fontboté Lluís  

Publisher： Springer Publishing Company

ISSN： 0026-4598

Source： Mineralium Deposita, Vol.43, Iss.7, 2008-09, pp. : 777-789

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