Neuquén Group (Upper Cretaceous): A case of underfilled-overfilled cycles in an Andean foreland basin, Neuquén basin, Argentina

Multiproxy provenance analysis of Lower to Upper Cretaceous synorogenic deposits in the Southern Andes (34–35°S): Evidence of coeval volcanism during the onset of the Andean orogeny

“…Based on this finding, Muñoz et al (2018) suggested the presence of a topographic barrier separating the eastern and western domains, associated with the growth of the Andean fold-and-thrust belt during the Late Cretaceous Muñoz et al, 2018;Gómez et al, 2019Gómez et al, , 2020 J o u r n a l P r e -p r o o f Muñoz et al, 2018;Gómez et al, 2019Gómez et al, , 2020 Cordillera, accompanied by the development of a topographic barrier that inhibited the sediment supply derived from the contemporaneous volcanic arc to the eastern foreland basin. However, Gómez et al (2019) found evidence of the influence of a volcanic arc during the Lower to Upper Cretaceous (Albian-Campanian) non-marine sedimentation in the foreland basin, and pyroclastic components associated with fluvial deposits were recognized within the Neuquén Group deposits (Corbella et al, 2004;Garrido, 2010;Sánchez et al, , 2013Asurmendi et al, 2017). Furthermore, Gómez et al (2020) observed reworked tuff levels with ca.…”

“…Moreover, an eastward arc migration is proposed in response to a shallowing of the subducted oceanic slab at ~35°S (Fennell et al, 2017a;Muñoz et al, 2018). This flat-slab stage produced an increase in the contractional deformation and the generation of a first order unconformity known as the Patagonidic (Ramos, 1988;Leanza, 2009;Tunik et al, 2010;Fennell et al, 2017b;Asurmendi et al, 2017;among others). For this paleogeographic scenario, Muñoz et al (2018) documented differences in provenance patterns between the western and eastern Lower Cretaceous synorogenic deposits of the Neuquén Basin (~35°S).…”

Fluvial deposits of the Diamante Formation as a record of the Late Cretaceous tectonic activity in the Southern Central Andes, Mendoza, Argentina

“…The Neuquén Group contains the syn-orogenic deposits within the early Andean foreland basin and is subdivided into three subgroups (Río Limay, Río Neuquén, the Río Colorado) and seven formations: Candeleros, Huincul and Cerro Lisandro formations in the Río Limay Subgroup; Portezuelo and Plottier formations in the Río Neuquén Subgroup; Bajo de la Carpa and Anacleto formations in the Río Colorado Subgroup (Cazau and Uliana, 1973;Uliana et al, 1975;Ramos, 1981;Garrido, 2010). A nonmarine environment is interpreted for the Neuquén Group, including braided and meandering fluvial systems, aeolian and lacustrine environments (Garrido, 2010;Sánchez and Asurmendi, 2016;Asurmendi et al, 2017). This sedimentary succession is interrupted by the unconformably overlying Maastrichtian-Danian marine facies of the Malargüe Group (Aguirre-Urreta et al, 2008 and references therein).…”

Huellas de dinosaurios en la costa oeste del embalse Ezequiel Ramos Mexía y alrededores (Cretácico Superior, Provincia de Neuquén, República Argentina)

“…Fue confirmada utilizando, en la base del Grupo Neuquén, datos de antigüedad U/Pb de los detritus de zircón (100 Ma; Fennell et al, 2017). También con base en las discontinuidades estratigráficas (Asurmendi et al, 2017). La Formación Candeleros es muy extensa en la Cuenca Neuquina, por lo que ha sido objeto tanto de estudios generales como de detalle; es por ello que ha dado lugar a interpretaciones variadas de su geología y ambiente de depositación (Roll, 1939;Herrero-Ducloux, 1946; Di Paola y Marchese, 1970;Marchese, 1971;Digregorio, 1972;Cazau y Uliana, 1973;Di Paola, 1973;Ramos, 1981;Uliana y Dellapé, 1981;Spalletti y Gazzera, 1989;Gazzera y Spalletti, 1990;Leanza y Hugo, 1995, 1997Ardolino et al, 1996;Leanza, 1999;Hugo y Leanza, 2001;Sánchez et al, 2004;Garrido, 2010).…”