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Location: 67 km NE from Durango, Durango, Mexico
Alonso de Pacheco 300Nueva VizcayaDurangoDurango, Mexico34080
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The San Gonzalo Vein is located approximately 1.4 km northeast of the Avino Vein. The San Gonzalo Vein system constitutes a strongly developed vein system over 25 m wide, trending 300° to 325°/80° northeast to 77° south. It is characterized by banded textures and open-space filling. The main vein has an average width of 2 m, but the silicapyrite or iron oxide-sericite alteration with additional stock working extends across 300 m, south of the main San Gonzalo Vein to the Los Angeles Vein.The San Gonzalo is a typical narrow vein, precious metal deposit with some erratic values and extends approximately 2 km to the northwest to the Santa Ana-Malinche area (Gunning 2009).The Cerro San Jose-La Estella-San Gonzalo Cerro San Jose represents a distinct hydrothermal centre with similar characteristics to the Avino system, which include the following (Paulter 2006):• Occur on a topographic high.• Strong to intense silicification and brecciation.• Easterly trending stockwork system similar to the trend of the Avino Vein.• Similar temperatures of formation to Avino.• Presence of an intersecting northwesterly trending vein system (la Estella at San Jose and San Juventino at Avino).• Emplacement along a northerly trending, deep crustal fault zone (defined by the Aguila Mexicana Vein at Cerro San Jose and the felsic dyke at Avino).
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