Brechas de Atrición y Mineralizaciones Auríferas en las minas de Miraflores (Quinchía, Risaralda)y su relación con un cuerpo tipo Brecha - Pipe

Abstract

Gold bearing veins hosted at the walls of attrition breccias are now in exploitation at the Miraflores mines and these breccias looks youngest than a breccia pipe body outcropping just at the eastern sector of them. The gold bearing veins are of epithermal type and even tough its width is centimetric they develops locally high gold concentrations (ore shoots or bonanzas), important alone for the small miners. Only at the places of La Balastrera (which correspond with an implosion breccia) and at the la Calichera (a typical crackle breccia), the basalt that host the breccias and the veins show gold bearing mineralizations. The breccia pipe observed at the surface and at the first meters of two tunnels is apparently barren but there are reasons to think that it is possible to find at deep, new gold ores capable to support medium scale or bulk mining explotations.