Combined thin-skinned and thick-skinned deformation in the central Andean foreland of northwestern Argentina

Abascal, Liliana del Valle

doi:10.1016/j.jsames.2005.01.004

Cited by 13 publications

(19 citation statements)

References 11 publications

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“…Shallower detachment levels only acted in the last advanced stages of the Andean deformation, when inter-montane basins were locked by the uplifted basement ranges or inverted blocks and the system was buttressed. In the Choromoro Basin, evaporitic levels of the Santa Bárbara subgroup were the ones proposed to act as a detachment plane (Abascal 2005). The Sierra de Medina and Sierra de La Candelaria uplift locked the propagation of the deformation and therefore the shallow detachments were triggered (Fig.…”

Section: Discussionmentioning

confidence: 99%

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

Iaffa

Sàbat

Muñoz

et al. 2013

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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.

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Section: Discussionmentioning

confidence: 99%

“…3). This basin holds Salta Group deposits and foreland sequences and is characterized by shallow detached faults (Abascal 2005). These thrusts produced north-trending folds and repeated the Foreland Basins II and III sequences.…”

Section: Cross Sectionsmentioning

confidence: 96%

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

Iaffa

Sàbat

Muñoz

et al. 2013

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“…The Sierra de Medina is bounded along its southern margin by a thrust fault with a concave shape to the north, which is very typical of a listric normal fault. This range shows syn-rift deposits of the Pirgüa subgroup thrusted over postrift and foreland layers (Abascal, 2005;Bossi, 1969;Iaffa et al, 2008). The Sierra de la Ramada is an NNE trending anticline with basement rocks in the core, and is bounded by syn-rift deposits along both margins (Fig.…”

Section: Regional Structurementioning

confidence: 95%

“…The normal faults of the Salta rifting stage continued to be poorly active in the early stages of the deposition of the Balbuena subgroup (Bianucci et al, 1982;Kley et al, 2005). The Balbuena subgroup is equivalent to the Rio Loro formation in the Choromoro Basin (Abascal, 2005). Foreland sediments were progressively covered by post-rift deposits.…”

Section: Stratigraphymentioning

confidence: 99%

“…The basin is bounded by the Sierra de San Javier, Sierra de Medina and the Sierra de Ramada to the north. These ranges form the southern units of the Santa Bárbara system due to tectonic inversion of Cretaceous extensional faults and to thrusting of syn-rift deposits over neogene layers (Abascal, 2005;Kley and Monaldi, 2002;Kley et al, 2005;Ramos, 1999). In the proximity of the Tucuman basin towards NNW is the southern tip of the Eastern Cordillera (Carrera et al, 2006) (Fig.…”

Section: Introductionmentioning

confidence: 99%

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Tectonic inversion in a segmented foreland basin from extensional to piggy back settings: The Tucumán basin in NW Argentina

Iaffa

Sàbat

Bello

et al. 2011

Journal of South American Earth Sciences

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Tectonics of Sedimentary Basins, with Revised Nomenclature

Ingersoll

2011

Tectonics of Sedimentary Basins

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Actualistic plate-tectonic models are the best framework within which to understand the tectonics of sedimentary basins. Sedimentary basins develop in divergent, intraplate, convergent, transform, hybrid, and miscellaneous settings. Within each setting are several variants, dependent on type(s) of underlying crust, structural position, sediment supply, and inheritance. Subsidence of sedimentary basins results from (1) thinning of crust (2) thickening of mantle lithosphere (3) sedimentary and volcanic loading (4) tectonic loading (5) subcrustal loading (6) asthenospheric flow, and (7) crustal densification. Basins vary greatly in size, life span, and preservation potential, with short-lived basins formed in active tectonic settings, especially on oceanic crust, having low preservation potential, and long-lived basins formed in intraplate settings having the highest preservation potential.Continental rifts may evolve into nascent ocean basins, which commonly evolve into active ocean basins bordered by intraplate continental margins with three types of configurations: shelf-slope-rise, transform, and embankment. Continental rifts that do not evolve into oceans become fossil rifts, which later become sites for development of intracratonic basins and aulacogens. If all plate boundaries within and around an ocean basin become inactive, a dormant ocean basin develops, underlain by oceanic crust and surrounded by continental crust.Sites for sedimentary basins in convergent settings include trenches, trench slopes, forearcs, intra-arcs, backarcs, and retroarcs. Complex dynamic behavior of arc-trench systems results in diverse configurations for arc-related basins. Most notable is the overall stress regime of the arc-trench system, with resulting response along and behind the magmatic arc. Intra-arc rifting in highly extensional arcs commonly evolves into backarc spreading to form new oceanic crust. Backarcs of neutral arcs can contain any type of preexisting crust that was trapped there at the time of initiation of the related subduction zone. Highly compressional arcs develop retroarc foldthrust belts and related retroforeland basins, and may develop hinterland basins; in extreme cases, broken retroforelands may develop in former cratonal areas.As nonsubductable continental or arc crust is carried toward a subduction zone, collision generally initiates at one point and the resulting suture propagates away from this point of initial impact. Remnant ocean basins form on both sides of the initial impact point, and rapidly fill with sediment derived from the suture zone. As collision continues, the flux of sediment into the remnant ocean basin(s) increases concurrently with shrinkage of the basin until final suturing and obduction of the accreted sediment occur. Concurrently with collision, proforeland basins form on continental crust of the subducting plate and collisional retroforeland basins form on the overriding plate. Impactogens, broken forelands, and hinterland basins also may result.In transform settings and along c...

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Combined thin-skinned and thick-skinned deformation in the central Andean foreland of northwestern Argentina

Cited by 13 publications

References 11 publications

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

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

Tectonic inversion in a segmented foreland basin from extensional to piggy back settings: The Tucumán basin in NW Argentina

Tectonics of Sedimentary Basins, with Revised Nomenclature

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