Talk: Volcano-tectonic relationships at the northern tip of the Liquine-Ofqui Fault Zone, Southern Volcanic Zone, Argentina

IVÁN A. PETRINOVIC; MATTHIAS STRAUER; CATALINA BALBIS; JAN OLIVER EISERMANN; ULRICH RILLER; ELIAS PITZKE

Heidelberg

Simposio; 24rd Latin American Colloquium LAK 2017; 2017

Most magmatic arcs form at plate margins that are characterized by oblique plate convergence. Components of margin-parallel shear in the upper plate are either resolved by distributed or localized deformation. The latter resultsin the formation of distinct faults characterized chiefly by horizontal displacements. Despite significant advances in our understanding of magmatic prosses in obliquely convergent tectonic settings, fundamental volcano-tectonic issues remain controversial nonetheless. For example, it is still unclear to what ectent the local (near-field) configuration of principal stresses as well as orientation, patterns and kinematics of faults may generate an certain type of volcanic center (e.g., colapse caldera, stratovolcano, monogenetic cone) and influence local magmatic activity and composition of magmatic products. in order to better understand these volcano magmatic relationships, we investigate neo-tectonic deformation spatially associated with magmatic centers at the northern tip of the dextral transpressive Liquiñe-Ofqui Fault Zone in the Southern Andean Volcanic Zone.