The role of inversion tectonics in the structure of the Cordillera Oriental (NW Argentinean Andes)

Carrera, Núria; Muñoz, J. A.; Sàbat, F.; Mon, Ricardo; Roca, Eduard

doi:10.1016/j.jsg.2006.07.006

Cited by 123 publications

(135 citation statements)

References 17 publications

Supporting

Mentioning

123

Contrasting

Unclassified

Order By: Relevance

“…As in other inversion provinces (e.g. Coward et al, 1989;Graciansky et al, 1989;Bailey et al, 2002;Kley et al, 2005;Carrera et al, 2006), the fundamental imprint of pre-existent basement fabrics has generated direct reactivation, with buttresses and shortcuts as typical inversion features. However, our observations show that inheritance of lateral displacement gradients and the mechanism of extensional fault growth itself are additional, important factors also in£uencing inversion styles in contractional orogens.…”

Section: Discussionmentioning

confidence: 93%

“…Nemcok et al, 2001). Finally, prominent along-strike changes in the patterns and styles of deformation have been observed in many inversion orogens (Grier et al, 1991;Carrera et al, 2006). However, few studies have unambiguously demonstrated that those changes are indeed determined by along-strike variations in the modes of previous extensional deformation, fault interaction, and linkage.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The role of inherited extensional fault segmentation and linkage in contractional orogenesis: a reconstruction of Lower Cretaceous inverted rift basins in the Eastern Cordillera of Colombia

Mora¹,

Gaona²,

Kley³

et al. 2009

Basin Research

View full text Add to dashboard Cite

Lower Cretaceous early syn-rift facies along the eastern £ank of the Eastern Cordillera of Colombia, their provenance, and structural context, reveal the complex interactions between Cretaceous extension, spatio -temporal trends in associated sedimentation, and subsequent inversion of the Cretaceous Guatiqu|¤ a paleo -rift. South of 4130 0 N lat, early syn-rift alluvial sequences in former extensional footwall areas were contemporaneous with fan-delta deposits in shallow marine environments in adjacent hanging-wall areas. In general, footwall erosion was more pronounced in the southern part of the paleorift. In contrast, early syn-rift sequences in former footwall areas in the northern rift sectors mainly comprise shallow marine supratidal sabkha to intertidal strata, whereas hanging-wall units display rapid transitions to open-sea shales. In comparison with the southern paleo -rift sector, fan-delta deposits in the north are scarce, and provenance suggests negligible footwall erosion.The southern graben segment had longer, and less numerous normal faults, whereas the northern graben segment was characterized by shorter, rectilinear faults.To the east, the graben system was bounded by major basin-margin faults with protracted activity and greater throw as compared with intrabasinal faults to the west. Intrabasinal structures grew through segment linkage and probably interacted kinematically with basin-margin faults. Basin-margin faults constitute a coherent fault system that was conditioned by pre-existing basement fabrics. Structural mapping, analysis of present-day topography, and balanced cross sections indicate that positive inversion of extensional structures was focused along basin-bounding faults, whereas intrabasinal faults remained una¡ected and were passively transported by motion along the basin-bounding faults.Thus, zones of maximum subsidence in extension accommodated maximum elevation in contraction, and former topographic highs remained as elevated areas.This documents the role of basin-bounding faults as multiphased, long-lived features conditioned by basement discontinuities. Inversion of basinbounding faults was more e⁄cient in the southern than in the northern graben segment, possibly documenting the inheritance and pivotal role of fault-displacement gradients. Our observations highlight similarities between inversion features in orogenic belts and intra-plate basins, emphasizing the importance of the observed phenomena as predictive tools in the spatiotemporal analysis of inversion histories in orogens, as well as in hydrocarbon and mineral deposits exploration.

show abstract

Section: Discussionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

The role of inherited extensional fault segmentation and linkage in contractional orogenesis: a reconstruction of Lower Cretaceous inverted rift basins in the Eastern Cordillera of Colombia

Mora¹,

Gaona²,

Kley³

et al. 2009

Basin Research

View full text Add to dashboard Cite

show abstract

“…This led to the formation of back-thrust and short-cut structures. The development of these styles has been well documented by Bonini et al (2000), Mitra (2002), Turienzo and Dimieri (2005) and Carrera et al (2006).…”

Section: Restored Section and Tectonic Shorteningmentioning

confidence: 88%

“…This situation has been related to the tectonic inversion of extensional basins and has been recognized in the northern Andes in the Maracaibo Basin of Venezuela (Escalona and Mann, 2006;Martínez et al, 2010), the Eastern Cordillera of Colombia (Mora et al, 2006), and along the Central Andes in the Neuquén Basin (Cristallini et al, 2006;Dicarlo and Cristallini, 2007;Yagupsky et al, 2008), Cuyo Basin (Dellapé and Hegedus, 1995) and the Salta Rift (Cristallini et al, 1997;Carrera et al, 2006).…”

Section: Introductionmentioning

confidence: 95%

The Lautaro Basin: A record of inversion tectonics in northern Chile

Martínez

Arriagada

Mpodozis

et al. 2012

andgeo

View full text Add to dashboard Cite

ABsTrACT. The Triassic and Jurassic tectonic history of northern Chile has been dominated by extension, although clear evidence about the nature and geometry of the extensional basins and subsequent inversion structures has been adequately illustrated in only a few cases. In this contribution we present a structural study of the Lautaro Basin located at the western edge of the Frontal Cordillera in the Atacama region of northern Chile. The Lautaro Basin is a Jurassic half-graben, filled by at least 2,600 m of marine deposits of the Lautaro Formation and developed on top of, at least 2,000 m of Triassic volcanic successions of the La Ternera Formation, also accumulated during an earlier period of extensional deformation. Detailed field mapping and construction of a regional balanced cross-section, supported by good exposures along the Copiapó River valley, allow reconstruction of the structural style of both the Jurassic and Triassic extensional depocenters. New structural data have shown that the Lautaro Basin has a complex structural framework reflected in two major Mesozoic extensional periods, overprinted by Cenozoic inversion involving thin-and thick-skinned tectonics. Shortening was accommodated by a combination of inversion of pre-existing normal faults, buttresses, development of footwall short-cuts, and both thin and thick-skinned thrusting. New estimates of shortening are up to 13.1 km (30%), while Mesozoic extension is estimated to be 3 km (7%). resuMen. La Cuenca Lautaro: un registro de inversión tectónica en el norte de Chile. Durante el Triásico y Jurá-sico la evolución tectónica del norte de Chile fue dominada por extensión cortical. No obstante, evidencias claras acerca del estilo estructural y subsecuente inversión de las cuencas asociadas con el evento extensional, han sido ilustradas en pocos casos. En este trabajo, se presenta un estudio estructural de la Cuenca Lautaro, localizada en el borde occidental de la Cordillera Frontal, en la región de Atacama del norte de Chile. La Cuenca Lautaro, es un hemigraben que aloja al menos 2.600 m de depósitos marinos de la Formación Lautaro, acumulados sobre al menos 2.000 m de sucesiones volcánicas triásicas de la Formación La Ternera. Los excelentes afloramientos de la región permitieron construir una sección balanceada y restaurar el estilo estructural de los depocentros extensionales triásicos y jurásicos. Los resultados obtenidos muestran que la Cuenca Lautaro tiene una arquitectura estructural compleja, reflejada en dos episodios extensionales mayores. Posteriormente, se sobreimpone al menos un evento de inversión tectónica que desarrolla una tectónica mixta de piel fina y piel gruesa. El acortamiento se acomoda por una combinación de inversión de fallas preexistentes, desarrollo de fallas de atajo y corrimientos de piel fina y piel gruesa, que involucran bloques rígidos o 'buttresses'. Las estimaciones de acortamiento son de 13,1 km (30%), mientras que la extensión mesozoica es de 3 km (7%).

show abstract

“…Thick-skinned structures were produced by the reactivation of deep crustal discontinuities (Mon & Hongn 1991), basement anisotropies and faults formed during Precambrian to Palaeozoic orogenies (Mon & Hongn 1991;Cristallini et al 2004;Quenardelle & Ramos 1999). The tectonic inversion of former extensional faults played a key role in the configuration of the Santa Bárbara System, at the NE of the study area (Grier et al 1991;Coutand et al 2001;Kley et al 2005;Carrera et al 2006;Hongn et al 2007). The Eastern Cordillera involves the inversion of Cretaceous syn-rift faults, but also basement faults that were not active during the rifting stage (Bianucci et al 1981;Grier et al 1991;Cristallini et al 1997;Kley & Monaldi 2002).…”

Section: Geological Settingmentioning

confidence: 99%

Basin fragmentation controlled by tectonic inversion and basement uplift in Sierras Pampeanas and Santa Bárbara System, northwest Argentina

Iaffa

Sàbat

Muñoz

et al. 2013

Self Cite

View full text Add to dashboard Cite

The study area is located within the Central Andes, a complex region composed of different structural styles. The region is characterized by highly elevated basement cored ranges, which abruptly break the foreland plain. These ranges were uplifted mainly by deep detached high-angle faults or by the inversion of former extensional faults of the Cretaceous rift. Palaeozoic orogenies generated crustal scale discontinuities in the basement, some of them reactivated during the Andean orogeny. Sedimentary sequences and layers architecture in the basins bordering ranges recorded the tectonic evolution of the region. Basement, syn–rift, post-rift and three foreland stages were interpreted in the seismic sections according to the arrangement of the horizons and the main outcropping geological units in bordering ranges. Based on seismic data sets and field data, here we document a particular style of activation of basement faults. Thick-skinned structures that are not always related to the tectonic inversion but to the reactivation of older basement anisotropies represent a paradox since they were not active during the rifting stage. A flat slab subduction and a subsequent angle recovery conditioned the structural evolution of the area.

show abstract

The role of inversion tectonics in the structure of the Cordillera Oriental (NW Argentinean Andes)

Cited by 123 publications

References 17 publications

The role of inherited extensional fault segmentation and linkage in contractional orogenesis: a reconstruction of Lower Cretaceous inverted rift basins in the Eastern Cordillera of Colombia

The role of inherited extensional fault segmentation and linkage in contractional orogenesis: a reconstruction of Lower Cretaceous inverted rift basins in the Eastern Cordillera of Colombia

The Lautaro Basin: A record of inversion tectonics in northern Chile

Basin fragmentation controlled by tectonic inversion and basement uplift in Sierras Pampeanas and Santa Bárbara System, northwest Argentina

Contact Info

Product

Resources

About