Cenozoic evolution of the intramontane Santa Marı́a basin, Pampean Ranges, northwestern Argentina

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

“…The newly formed topography and its associated denudation deposits reached out and covered the study area (Russo & Serraiotto 1979;Jordan & Alonso 1987). Three foreland basin units in this and in previous studies were defined based in the stratigraphic formations described (Bossi et al 2001;Iaffa et al 2011a). The three units constrain the relative ages of uplift, permitting comparison of the evolution of the different basins.…”

“…The Sierra de Quilmes is characterized by the absence of outcropping faults controlling both slopes of the range (Mortimer et al 2007). In the eastern part of the Sierra de Quilmes, the Santa María Basin presents foreland layers directly on top of the basement with no Salta Group deposits in the stratigraphic record (Strecker et al 1989;Bossi et al 2001;Sobel & Strecker 2003). The western slope of the Cumbres Calchaquíes is elevated by high-angle west-directed thrusts that expose basement rocks on Neogene foreland beds (Fig.…”

Diseños de puntas de proyectil en el valle de Santa María (Catamarca, Argentina): una aproximación a la ocupación cazadora-recolectora

“…Conforma una depresión tectónica en el sentido SSE-NNW de más de 100 km de extensión y cerca de los 20 km de ancho (Bossi et al 2001). Es atravesado por el meridiano de 66° al norte y al sur limita con los paralelos 26° y 27°.…”

Tectonics, Climate, and Landscape Evolution of the Southern Central Andes: the Argentine Puna Plateau and Adjacent Regions between 22 and 30°S

“…The Sierras Pampeanas between 27 and 33°S are structurally transitional to the mountain ranges of the Puna and the Cordillera Oriental and comprise Laramide-style crystalline basement uplifts in a region, which coincides with the flat subduction of the oceanic Nazca Plate (e.g., Mon 1979;Jordan et al 1983;Gonzáles and Mon 1996) that became active in late Miocene time after the last Tertiary transgression into the Andean foreland (e.g., Ramos and Alonso 1995;Ramos et al 2002), accelerated after about 4 Ma, and culminated after 3 Ma, when intramontane basin deposits were folded and partly overthrust Bossi et al 2001;Kleinert and Strecker 2001;.…”

“…These sedimentary basins are presently internally drained and contain thick sequences of continental evaporites and clastic deposits (Jordan and Alonso 1987;Alonso et al 1991). Contraction in the region of the present-day plateau and adjacent areas in the Eastern Cordillera and the northern Sierras Pampeanas has apparently contributed to the formation of closed depocenters on the present plateau and transiently closed intramontane basins within the other tectonic provinces of northwestern Argentina Alonso et al 1991;Grier et al 1991;Kraemer et al 1999;Coutand et al 2001;Marrett and Strecker 2000;Bossi et al 2001;Carrapa et al 2005). Jordan et al (1983) The Eastern Cordillera comprises a region of late Proterozoic to early Paleozoic metasedimentary and intrusive rocks (e.g., Jezek et al 1985;Omarini 1983) that were uplifted along bivergent, north-northeast striking thrust faults, which were largely responsible for the deformation of Neogene intramontane and foreland sedimentary sequences (Mon and Salfity 1995).…”