Adakite-like signatures of Middle-Late Miocene intrusions at the Altar porphyry Cu-(Mo-Au) deposit (31º 29' S, 70º 28´ W) in the Andean Main Cordillera of San Juan, Argentina

MAYDAGAN, L.; FRANCHINI, M,; CHIARADIA, M; MAS, G.R.; IMPICCINI, A.

Keystone, Colorado

Congreso; SEG 2010 Conference; 2010

Societu of Economic Geology

In the Andean Cordillera several recent studies have highlighted a link between large-scale geodynamic changes (e.g., slab flattening and aseismic ridge collision with the trench), magma chemistry changes (from normal to adakite-like, i.e., high Sr/Y) and the formation of giant porphyry Cu mineralization (Cooke et al., 2005; Richard and Kerrich, 2007; Chiaradia et al., 2009). Because the profound reasons of this association remain elusive, it is important to understand the temporal and spatial pattern of the association between geodynamic setting changes, magma chemistry transitions to adakite-like and porphyry Cu mineralization.