Producción CyT
Congreso
Autoría
ECHAURREN GONZALEZ, ANDRES
;
Encinas, Alfonso
;
SAGRIPANTI, LUCIA
;
Duhart, Paul
;
Zambrano, Patricio
;
FOLGUERA TELICHEVSKY, ANDRES
Fecha
2017
Editorial y Lugar de Edición
Asociación Geológica Argentina
ISSN
978-987-42-6135-9
Resumen
Información suministrada por el agente en
SIGEVA
The forearc zone in the Andean subduction zone at ~42-44° S exhibits a particular configuration given by basins with a thick sedimentary infilling, a pronounced forearc high, and a west-vergent structure potentially related to the Liquiñe-Ofqui Fault Zone. Here, field and subsurface sedimentary units of late Oligocene - early Miocene age record the transition from an extensional to a contractional regime acting since middle Miocene times. New field and seismic data constrain this def...
The forearc zone in the Andean subduction zone at ~42-44° S exhibits a particular configuration given by basins with a thick sedimentary infilling, a pronounced forearc high, and a west-vergent structure potentially related to the Liquiñe-Ofqui Fault Zone. Here, field and subsurface sedimentary units of late Oligocene - early Miocene age record the transition from an extensional to a contractional regime acting since middle Miocene times. New field and seismic data constrain this deformation as focused in the north of the segment, suggesting a differential contractional reactivation of the previous extensional structures. Causes of this compressive stage could be initially associated to the accretion of the Chiloé block that drifted in the previous extensional phase during the late Oligocene-early Miocene.
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Palabras Clave
Western Andean slopeneogene deformationPatagoniaChiloé
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