The role of inherited structures in a foreland basin evolution. The Metán Basin in NW Argentina

Iaffa, Diego Nicolas; Sàbat, F.; Muñoz, J. A.; Mon, Ricardo; Gutiérrez, Antonio

doi:10.1016/j.jsg.2011.09.005

Cited by 51 publications

(66 citation statements)

References 41 publications

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“…To the north, the basement is formed by Cambrian meta-sedimentary rocks covered by Ordovician marine deposits through an angular unconformity; these last are absent in the study region (Turner 1970;Mon & Hongn 1991;Rossi et al 1992). The Silurian to Devonian rocks filling the Tarija Basin and its southern continuation, the ChacoParanaense Basin (Turner 1970;Allmendinger et al 1983;Starck & Del Papa 2006), have only been found in the subsoil of the easternmost part of the study area and in the stratigraphic record of the drilled wells (Cristallini et al 1997;Fernández Garrasino et al 2005;Iaffa et al 2011b).…”

Section: Stratigraphymentioning

confidence: 96%

“…6e). In the Metán Basin, syn-rift layers to the centre of the basin are found at depths of .5000 m (Iaffa et al 2011b). The eastern flank of the basin is composed of a halfgraben that has been truncated by a west-directed basement thrust (Figs 5c & 6e).…”

Section: Cross Sectionsmentioning

confidence: 98%

“…The Cerro Colorado range is the result of a tectonic inversion produced by the reactivation of a fault on the eastern flank. This range is exposing syn-rift halfgraben layers thrusting over sag-foreland on the east (Iaffa et al 2011b). No Salta Group deposits were found east of the Cerro Colorado .…”

Section: Cross Sectionsmentioning

confidence: 99%

“…Foreland sedimentary layers cover a series of syn-rift deposits held by normal faults produced during the Salta Rift that were not inverted by the Andean compression. Cretaceous half-grabens that preserved their original geometry were described in the eastern and southern part of the Tucumán Basin (Cristallini et al 2004;Iaffa et al 2011a) and in the northeastern part of the Metán Basin (Cristallini et al 1997;Mon et al 2005;Iaffa et al 2011b).…”

Section: Structural Stylesmentioning

confidence: 99%

“…Cristallini et al (1997) defined a deeper level set at 20 km. A shallower detachment level explains the origin of the tectonic inversion of faults and folds that does not match the bigger structures and the smaller wavelength of these folds in the centre of the Metán Basin (Iaffa et al 2011b; Fig. 6e).…”

Section: Structural Analysismentioning

confidence: 99%

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

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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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