A Miocene Continental Basin associated with the back thrusting of the Eastern Sierras Pampeanas in the Santa Maria Valley, Northwestern Argentina

Mon, Ricardo; Gutiérrez, Adolfo Antonio; Sàbat, F.; Iaffa, Diego Nicolas

doi:10.3301/ijg.2011.27

Cited by 3 publications

(14 citation statements)

References 12 publications

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“…In the northwestern area there are small outcrops (Figure 2). The fine conglomerate in discordance on granitic rocks and the red arcilitic sandstones, were found in other areas such as Condor Huasi in the Campo del Pucará, El Remate in the Amaicha valley, in Los Colorados in the Santa María valley and in the middle western slope of the Cumbres Calchaquíes [14,15,35,43].…”

Section: Discussionmentioning

confidence: 95%

“…Based on its characteristics and disposition, we consider that this sequence belongs to the Santa Bárbara Subgroup of the Salta Group. The conglomerate was found in the Campo del Pucará and in the Santa María Valley [14,43], the sandstones and red claystones in the Los Colorados area, in the Santa María valley and on the western, middle slope of the Cumbres Calchaquíes, over thrusted by metamorphic basement [35].…”

Section: Paleogenementioning

confidence: 99%

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Sinestral Rotation and NNW Shortening of the Ambato Block induced by Cenozoic NE to E-W Transpression, Argentina

Gutiérrez¹,

Mon²,

Arnous³

et al. 2019

Int J Earth Sci Geol

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South of 27° S, where the Nazca plate sinks with low angle below the South American plate, the mountain ranges that constitute the Sierras Pampeanas where uplifted by reverse faults, tilted to the east, during the Pliocene. The analysis and interpretation of satellite images and the systematic recording of fracture planes in outcrops of metamorphic basement rocks and Neogene sediments allow us to determine tectonic events that gave the region of the Ambato Block a NE shortening, a sinestral rotation and NNW shortening. As a result of these tectonic events, during the convergence of the Nazca and South American plates, reverse faults, gravitational faults and transcurrent faults were generated, and the division of the Ambato Block into smaller ranges and the development of intramontane basins ocurred. The Las Cañas normal fault, with E-W strike, was generated before the Andean tectonics, using the schistosity planes of the metamorphic basement; it constitutes a step in which the outcrops of the Santa Bárbara Subgroup of the Salta Group end.

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Section: Discussionmentioning

confidence: 95%

Section: Paleogenementioning

confidence: 99%

Sinestral Rotation and NNW Shortening of the Ambato Block induced by Cenozoic NE to E-W Transpression, Argentina

Gutiérrez¹,

Mon²,

Arnous³

et al. 2019

Int J Earth Sci Geol

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“…1). Sediments from the Cretaceous Rift could not have covered these mountain ranges because they were elevated [7], the outcrops of the Pirgua Subgroup of the Salta Group reached the northern end of the Cumbres Calchaquíes and the western edge of the Sierra de San Javier (Fig. 1).…”

Section: Regional Geologymentioning

confidence: 99%

“…Neogene sediments occupied the Choromoro and Las Estancias basins in Tucumán and the Santa María basin in Catamarca. In the Santa María valley the sedimentary sequence overlaps the metamorphic basement towards the Amaicha valley, reaching the Infiernillo pass [7,20,21], while in the northern end from the Sierra de Aconquija the volcanism that gave rise to the extrusive rocks of Cerro Las Ánimas occurred ca. 13 Ma [22,23].…”

Section: Regional Geologymentioning

confidence: 99%

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Piedmont deposits as seismic energy dissipators, Sierras Pampeanas of Argentina

et al. 2021

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This study shows the neotectonic deformation occurred in the southern piedmont of the Cumbres Calchaquíes, in the Amaicha and Tafí valleys. Neotectonic deformation manifests itself through faults, folds and diversions of drainage channels. The Amaicha valley is bounded to the north by the Tafí del Valle fault and to the south by the Los Cardones fault. The Cumbres Calchaquíes ride over the Sierra de Aconquija through the Los Cardones and Carapunco faults. The Carapunco fault also has a synestral component, responsible for generating an imbricated system of contractional fractures. In the study region many earthquakes of ≥ 3 and ≥ 4 magnitude coincide with regional faults evidencing its neotectonic activity. The seismic energy dissipated through materials with less cohesion that form the fill of the valleys, generating discrete fault scarps and strongly folded conglomerate strata. The foothills deposits of the Cumbres Calchaquíes absorbed most of the seismic energy released during the reactivation of the faults. Tectonic activity is deforming 630 a BP deposits in the Cumbres Calchaquíes piedmont.

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Geomorphological evolution of the western piedmont of Cumbres Calchaquíes (Tucumán Province, NW Argentina)

Sampietro-Vattuone

Peña-Monné

2023

Journal of Maps

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A Miocene Continental Basin associated with the back thrusting of the Eastern Sierras Pampeanas in the Santa Maria Valley, Northwestern Argentina

Cited by 3 publications

References 12 publications

Sinestral Rotation and NNW Shortening of the Ambato Block induced by Cenozoic NE to E-W Transpression, Argentina

Sinestral Rotation and NNW Shortening of the Ambato Block induced by Cenozoic NE to E-W Transpression, Argentina

Piedmont deposits as seismic energy dissipators, Sierras Pampeanas of Argentina

Geomorphological evolution of the western piedmont of Cumbres Calchaquíes (Tucumán Province, NW Argentina)

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