The Subduction of the Copiapó Aseismic Ridge, is the causing of the formation of metallic minerals deposits in North of Chile and Argentine?

M. E. GIMENEZ; ACOSTA GEMMA; ALVAREZ ORLANDO; PESCE AGUSTINA; FEDERICO LINCE KLINGER; ANDRES FOLGUERA

Geodesy and Geodynamics

Elsevier

Año: 2019 vol. 10 p. 471 - 476

1674-9847

The results obtained in this work evince that the metallic mineral deposits located in the northern region of the Chilean-Pampean flat slab (in northern Chile and north-western Argentina), at approximately 27º 30`S, would be related to the subduction of the Copiapó aseismic ridge. The analysis of the gravity anomalies and vertical gravity gradient allows inferring a deflection and truncation of the main trend of the Andean structures at the extrapolated zone of the Copiapó ridge beneath South America. Thus, the general NNE-trend of the Andean structures rotating are rotated locally to an ENE- strike within the area of the Ojos del Salado - San Buena Ventura lineament. We expalin that this anomalous behavior of the gravity derived anomalies is related to the deformational effects imprinted by the ridge subduction. Regions with a low subduction angle (