Studies of Quaternary deformation zones through geomorphic and geophysical evidence

Terrizzano, Carla; Fazzito, Sabrina Y.; Cortés, José María; Rapalini, Augusto E.

doi:10.1016/j.tecto.2010.05.006

Cited by 15 publications

(27 citation statements)

References 31 publications

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“…These results are both in agreement with structural data from the southern Precordillera (Fig. 7a, c), where a Cenozoic sinistral transpression has been reported due to reactivation of Paleozoic-Triassic NNW-NNE structures (Cortés et al, 2005(Cortés et al, , 2006Giambiagi et al, 2010;Terrizzano et al, 2010). Particularly, the structures obtained in the models would be equivalent to the Barreal-Las Peñas belt ( Fig.…”

Section: Models and The Neogene Structure Of The Precordillerasupporting

confidence: 90%

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Estructura neógena de la Precordillera Andina, Argentina: aportes de modelos análogos.

Oriolo

Cristallini

Japas

et al. 2015

Andgeo

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ABSTRACT. Analogue models combining different sets of preexisting structural weaknesses were developed to understand their evolution during regional ~ENE shortening. Strain analysis of simulations was performed with the GEODEF 1.1 software, a tool that allows to quantify deformation in plan view on the basis of displacement fields. Results showed up that regional NNE heterogeneities are reactivated as dextral reverse-slip structures, though NNE neoformed thrusts are also present. Likewise, dominant sinistral strike-slip motions have been obtained for reactivated second-order WNW structures whereas sinistral reverse-slip has been recorded for NW ones. Comparison of these results with structural, kinematic and paleomagnetic data supports partitioned dextral transpression for the northern Andean Precordillera since the Miocene. Moreover, models not only confirm sinistral strike-slip motions for WNW structures of the Precordillera but also suggest that they would represent preexisting crustal fabrics that were reactivated during the Andean orogeny. These cross-strike structures have played a significant role in the construction and evolution of the fold and thrust belt as they segmentate the activity of orogen-parallel structures. RESUMEN. Estructura neógena de la Precordillera Andina, Argentina: aportes de modelos análogos. Se llevaron a cabo una serie de modelos análogos en los que se combinaron diferentes sistemas de debilidades estructurales preexistentes a fin de entender su evolución vinculada a acortamiento regional en dirección ~ENE. El análisis de la deformación de las simulaciones fue realizado a través del software GEODEF 1.1, una herramienta que permite la cuantificación de la deformación en planta sobre la base de campos de desplazamiento. Los resultados obtenidos muestran que las heterogeneidades regionales de rumbo NNE se reactivan como estructuras dextrales inversas, si bien también se generan corrimientos neoformados de igual orientación. Asimismo, se obtuvieron desplazamientos de rumbo sinistral dominante para estructuras reactivadas de segundo orden de rumbo WNW, mientras que desplazamientos sinistrales inversos se registraron en aquellas de rumbo NW. La comparación de estos resultados con datos estructurales, cinemáticos y paleomagnéticos señala la existencia de transpresión dextral particionada para el precordillera norte desde el Mioceno. A su vez, los modelos no solo confirman los desplazamientos de rumbo sinistral para las estructuras WNW de la precordillera, sino que también sugieren que estas constituirían fábricas corticales preexistentes que fueron reactivadas durante la orogenia andina. Estas estructuras oblicuas han tenido un rol significativo en la construcción y evolución de la faja plegada y corrida, ya que segmentan la actividad de las estructuras paralelas al orógeno.

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Section: Models and The Neogene Structure Of The Precordillerasupporting

confidence: 90%

“…Particularly, the structures obtained in the models would be equivalent to the Barreal-Las Peñas belt ( Fig. 7a; Terrizzano et al, 2010) and similar systems located therein.…”

Section: Models and The Neogene Structure Of The Precordilleramentioning

confidence: 68%

Estructura neógena de la Precordillera Andina, Argentina: aportes de modelos análogos.

Oriolo

Cristallini

Japas

et al. 2015

Andgeo

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“…The method found its way to applications in imaging geological structures and its usefulness in this field is well proven, especially for fault detecting and characterisation (e.g., Colella et al 2004;Diaferia et al 2006;Terrizzano et al 2010Terrizzano et al , 2012Pánek et al 2011). An exhaustive discussion of different aspects of the ERT method such as DC measurement theory, field acquisitions and processing can be found elsewhere (e.g., Dahlin 1996;Loke and Barker 1996;Loke 2001).…”

Section: Geophysical Investigationsmentioning

confidence: 99%

Mnin restraining stepover – evidence of significant Cretaceous–Cenozoic dextral strike-slip faulting along the Teisseyre-Tornquist Zone?

Konon¹,

Ostrowski²,

Rybak-Ostrowska³

et al. 2016

Acta Geologica Polonica

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ABSTRACT:Konon, A., Ostrowski, S., Rybak-Ostrowska, B., Ludwiniak, M., Śmigielski, M., Wyglądała, M., Uroda, J., Kowalczyk, S., Mieszkowski, R. and Kłopotowska, A. 2016. Mnin restraining stepover -evidence of significant Cretaceous-Cenozoic dextral strike-slip faulting along the Teisseyre-Tornquist Zone? Acta Geologica Polonica, 66 (3), 429-449. Warszawa.A newly recognized Mnin restraining stepover is identified in the Permo-Mesozoic cover of the western part of the Late Palaeozoic Holy Cross Mountains Fold Belt (Poland), within a fault pattern consisting of dextral strikeslip faults. The formation of a large contractional structure at the Late Cretaceous -Cenozoic transition displays the significant role of strike-slip faulting along the western border of the Teisseyre-Tornquist Zone, in the foreland of the Polish part of the Carpathian Orogen. Theoretical relationships between the maximum fault offsets/mean step length, as well as between the maximum fault offsets/mean step width allowed the estimation of the values of possible offsets along the Snochowice and Mieczyn faults forming the Mnin stepover. The estimated values suggest displacements of as much as several tens of kilometres. The observed offset along the Tokarnia Fault and theoretical calculations suggest that the strike-slip faults west of the Late Palaeozoic Holy Cross Mountains Fold Belt belong to a large strike-slip fault system.We postulate that the observed significant refraction of the faults forming the anastomosing fault pattern is related also to the interaction of the NW-SE-striking faults formed along the western border of the TeisseyreTornquist Zone and the reactivated WNW-ESE-striking faults belonging to the fault systems of the northern margin of the Tethys Ocean.

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“…Different structural features that have been uplifted during the Cenozoic to Recent Andean orogeny show nevertheless evidence of neotectonic contractional activity along this sector (Cortés and Costa, 1993;Cortés and Cegarra, 2004;Terrizzano et al, 2009Terrizzano et al, , 2010. The Late Cenozoic deformation along this part of the BarrealeUspallata valley is represented by scattered structural highs carved in Paleozoic and Quaternary sequences and by subtle modifications of the drainage networks in the piedmont alluvial Fig.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, given the above mentioned issues and the results obtained in previous surveys of our research group Terrizzano et al, 2010), we decided to study the shallow subsurface character of these structural features by means of electrical resistivity tomographies.…”

Section: Introductionmentioning

confidence: 99%

Electrical resistivity tomography applied to the study of neotectonic structures, northwestern Precordillera Sur, Central Andes of Argentina

Terrizzano

Fazzito

Cortés

et al. 2012

Journal of South American Earth Sciences

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Studies of Quaternary deformation zones through geomorphic and geophysical evidence

Cited by 15 publications

References 31 publications

Estructura neógena de la Precordillera Andina, Argentina: aportes de modelos análogos.

Estructura neógena de la Precordillera Andina, Argentina: aportes de modelos análogos.

Mnin restraining stepover – evidence of significant Cretaceous–Cenozoic dextral strike-slip faulting along the Teisseyre-Tornquist Zone?

Electrical resistivity tomography applied to the study of neotectonic structures, northwestern Precordillera Sur, Central Andes of Argentina

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