Análisis de procedencia de las Formaciones de la cuenca de Cuenca al sur del Ecuador y sus implicaciones en el contexto geológico

Abstract

The Cuenca Basin located in the Interandean Valley has a sedimentary and volcanic fill of Mio-Pliocene age characterized by diverse lithologies. The analyzes of provenance carried out in the present study reflect that the basin has sources of cratonic or continental input that has been related to the Eastern Cordillera (Yunguilla, Quingeo and Biblián Formations) and volcanic sources that would correspond to a provenance of the Western Cordillera (Chinchín, Azogues, Mangán, Turi and Tarqui Formations). These results were confirmed by recent studies by Vallejo et al., (2019), in which they suggests that the source of the Yunguilla Formation is from the Cordillera Real with some volcanic input; and by George, (2019), who with age analysis of detrital zircons, paleocurrents and clast count, suggests that the younger detrital ages and volcanic clasts found in the Azogues, Mangán, Turi and Tarqui Formations come from the west, while the metamorphic clasts found in Biblián Formation are due to an input from the SSE related to the exposure of the basement during the subsidence of the basin.