Permian to Triassic extensional deformation superimposed to Gondwanic structures in the cordillera del Viento (Southern Central Andes): A combined field and geophysical study

 

Autores
Sagripanti, Lucía; Folguera Telichevsky, Andres; Gimenez, Mario Ernesto; Rojas Vera, Emilio Agustin; Fabiano, J. J.; Molnar, N.; Fennell, Lucas Martín; Ramos, Victor Alberto
Tipo de recurso
artículo
Estado
Versión publicada
Año de publicación
2014
País
Argentina
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio
CONICET Digital (CONICET)
Descripción
Combined field and gravimetric-magnetic data reveal a complex pattern of extensional structures superimposed to the late Carboniferous – Early Permian Gondwanan orogen at the inner sectors of the Southern Central Andes, in the westernmost part of the Chos Malal fold and thrust belt at the cordillera del Viento area. W-NW, NW basement structures of regional significance, segmented by minor NE structures are bounding Late Triassic depocenters and structural highs corresponding to the cordillera del Viento rifting, equivalent to the Precuyo cycle. A pattern of roughly N-S trending structures recognized in the field associated with Andean thrusts do not show evidences of previous structural controls, as they cut the magnetic anomalies. Field observations show that W-NW, NW and NE normal structures control changes in Late Triassic sedimentary thicknesses and are associated with synextensional geometries. Our model indicates that Late Triassic rifting in the area would have had a regional W-NW to NW trend being segmented by minor NE structures. Both sets were reactivated during Andean times, acting W-NW and NW structures as transfer zones between decoupled contractional panels and NE structures as frontal contractional structures. N-S contractional structures did not respect rifting architecture cutting through the depocenters and occasionaly exhuming synextensional geometries
Idioma
inglés
OAI Identifier
oai:ri.conicet.gov.ar:11336/4998
Enlace del recurso
http://hdl.handle.net/11336/4998
Nivel de acceso
Acceso abierto
Materia
Synextensional sedimentation
Peri-Gondwanic extensional collapse
Southern Central Andes
Cordillera del Viento
Geociencias multidisciplinaria
Ciencias de la Tierra y relacionadas con el Medio Ambiente
CIENCIAS NATURALES Y EXACTAS