Nuevas evidencias sobre la evolución tectónica del sistema de vetas de Ag-Au San Pedro, distrito minero Andacollo, Neuquén

DICARO, S.; GIACOSA, R.E; GRECO, G.A.; PONS, M.J.; GONZÁLEZ, S.N.

Ciudad Autónoma de Buenos Aires

Congreso; XII Congreso Argentino de Geología Económica; 2020

Asociación Argentina de Geólogos Economistas (AAGE)

THE TECTONIC EVOLUTION OF THE SAN PEDRO Ag-Au VEIN SYSTEM, ANDACOLLODISTRICT, NEUQUEN: NEW INSIGHTS. The Andacollo district is the most important metalliferous mining district of the Neuquén province, hosting more than 56 veins with precious and base metal mineralization. The present work is focused on the structural geology of the San Pedro vein system and its host rocks. Two fold sets were identified and related to reverse faults and thrusts. One set consist in tight and isoclinal folds, while the other is represented by opened folds. The veins as well as their respective host rocks are folded with the aforementioned styles. The first fold set might be related to the San Rafael orogenic phase and the second one to the Andean orogenic cycle. The structural data supports that the development of the San Pedro vein system took place synchronously with the structures related to the San Rafael orogenic deformational phase.