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Revista de la Asociación Geológica Argentina

versão impressa ISSN 0004-4822

Resumo

GIANNI, Guido et al. Tectónica cuaternaria en el retroarco Andino a la latitud del volcán Tromen (37°s). Rev. Asoc. Geol. Argent. [online]. 2014, vol.71, n.4, pp.513-525. ISSN 0004-4822.

Recent studies focalized in the vicinity of the Tromen volcano, in the northern Neuquén province, indicate the presence of Quaternary structures. In particular, a detailed analysis on its western volcanic flank shows broad neotectonic deformational zones, whose only frontal sector had been previously recognized. Geometry and associated mechanisms are described for these, through the two main incisions that are developed on the volcanic flank. The coexistence between contractional and extensional neotectonic structures is described as a distinctive feature and consequently the related stress field is discussed. While some studies had argued that young deformation in the area would be predominantly contractional, others indicated that it would be mainly extensional. Finally, an alternative reconciling both models is put forward based on the new data.

Palavras-chave : Neotectonics; Volcanism; Extension; Compression; Andean phases.

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