Nueva división de las épocas metalogénicas pre-mesozoicas en el noroeste argentino

LÓPEZ DE AZAREVICH, V.L.,; MIGUEL AZAREVICH

Mar del PLata

Congreso; Congreso; XII Congreso Argentino de Geólogos Economistas; 2020; 2020

Asociación Argentina de Geólogos Economistas

The Northwest of Argentina is conformed by regions Puna, Eastern Cordillera, Subandean Ranges, Santa Bárbara System and the NW portion of NW Pampean Ranges. From the metallogenic point of view, there was defined only one metallogenic epoch (ME) for the Neoproterozoic-Permian interval, which included extremely variable mineral deposits, associated with diverse geotectonic settings. Here arguments are presented that allow a new definition of the ME for such interval, considering the geotectonic processes through time: i) MEI (Neoproterozoic-Late Cambrian), with industrial rocks deposits; ii) MEII (Ordovician), with arc, retroarco and proximal basin environments, and genesis of metamorphic (Al), pegmatite, hydrothermal of Au-Cu-Pb-Zn-Ba, sedex?VMS, phosphorites; iii) MEIII (Silurian), with proximal marine basins and sedimentary-Fe deposits; iv) MEIV (Devonian), with formation of siliciclastic marine basins associated to oil accumulation; v) MEV (Carboniferous-Permian), characterized by intracratonic basins and alkaline ultramafics