Relaciones estructurales entre plutones durante la construcción de un batolito: Batolito Cerro Áspero, Sierra de Comechingones, Córdoba.

PINOTTI, LUCIO; D'ERAMO, FERNANDO; TUBÍA, J.M.; VEGAS, N.; DEMARTIS, MANUEL; CONIGLIO. JORGE; LLAMBÍAS, E.

La Plata

Congreso; XVI Congreso Geológico Argentino; 2005

Nearly circular in outcrop, the Alpa Corral pluton is one of the post-tectonic monzogranitic plutons of the Sierras Pampeanas, in Córdoba (Argentina). This pluton intrudes the Early Paleozoic basement of the Sierras Pampeanas during Late Devonian times. This concentrically zoned pluton is made up by inequigranular to porphyritic monzogranites, distributed in two units: a internal unit formed by coarse porphyritic granite and a external unit represented by inequigranular leucogranite. Bulk magnetic susceptibility (K) shows bimodal distribution, reflecting magnetite-rich granites for the internal unit and magnetite-poor to paramagnetic granites within external unit. This work is mainly concerned with the structure of the Alpa Corral pluton, paying special attention to how the intrusion of the larger El Talita pluton modifies the structure of the Alpa Corral body. Microstructural evidence indicates that magnetic fabrics are entirely magmatic in origin and reflect the internal magma dynamics. From structural and Anisotropy of Magnetic Susceptibility measurements, the internal structure and the interplay between plutons during the construction of the Cerro Aspero batholith has been inferred.