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CONICET Digital
Article . 2021
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Estratigrafía caracterización paleoambiental y correlación del Paleozoico Superior en la localidad Río Francia, Cuenca Paganzo, Argentina

Authors: Correa, Gustavo Alejandro; Gutierrez, Pedro Raul;

Estratigrafía caracterización paleoambiental y correlación del Paleozoico Superior en la localidad Río Francia, Cuenca Paganzo, Argentina

Abstract

Las formaciones Tupe y Patquía son conocidas por sus depósitos marinos, deltaicos, fluviales y eólicos, los cuales registran diferentes eventos del Paleozoico tardío en la Cuenca Paganzo, en el centro oeste de Argentina. En el área del río Francia (provincia de San Juan, Argentina), estas unidades adquieren una especial relevancia por ubicarse en un lugar estratégico de conexión con las secuencias sedimentarias más australes en la Cuenca Paganzo sobre la precordillera Central. La Formación Tupe (que por datos palinológicos representaría el intervalo Serpukhoviano tardío-Gzheliano medio) totaliza un espesor mínimo de 140 m de pelitas bioturbadas con un porcentaje menor de areniscas gruesas a finas intercaladas, las cuales en este trabajo se agrupan en 3 asociaciones de facies: I lagoon, II isla barrera y III shoreface. La Formación Patquía (a partir de datos palinológicos, en esta localidad, de edad cisuraliana) es una típica sucesión de estratos rojos con depósitos de areniscas finas entrecruzadas, y alternancia de areniscas con pelitas. En ella fueron diferenciadas 3 asociaciones de facies: IV fluvial anastomosado, V eólico y VI barreal. Un análisis de correlación entre estas formaciones y sus equivalentes litoestratigráficos brindó posibles escenarios para el sector occidental de la Cuenca Paganzo, mostrando en estas latitudes un lineamiento de unidades con ambientes costeros para la Formación Tupe y equivalentes. En cambio para la Formación Patquía y sus equivalentes, se muestra una progresiva continentalización de norte a sur.

The Tupe and Patquía formations are known for their marine, deltaic, river, and eolian deposits that record different Late Paleozoic events in the Paganzo Basin. However, in the area of the Río Francia (Province of San Juan, Argentina), these units are relevant because they are located in a strategic place of connection with the southernmost sedimentary sequences in the Paganzo Basin on the Central Precordillera. The Tupe Formation (which by palynological data would represent the late Serpukhovian-Gzhelian interval) has a minimum thickness of 140 m of bioturbed mudstones with a minor percentage of coarse to fine sandstones intercalated. In this work they are grouped into 3 facies associations: I lagoon; II barrier island and III shoreface. The Patquía Formation (from palynological data, in this locality, of Cisuralian in age), it is a typical succession of red beds with deposits of fine -grained sandstones with cross-bedding, and alternation of sandstones with mudstones. 3 facies associations were differentiated: IV anastomosed fluvial; V eolian and VI playa lake. A correlation analysis between these formations and their lithostratigraphic equivalents provided possible scenarios for the western sector of the Paganzo Basin, showing a lineament of units with coastal environment features for the Tupe Formation and equivalents at these latitudes. On the other hand, the Patquía Formation and their equivalents display a progressive continentalization from north to south.

Fil: Correa, Gustavo Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Centro de Investigaciones de la Geosfera y Biosfera. Universidad Nacional de San Juan. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones de la Geosfera y Biosfera; Argentina. Universidad Nacional de San Juan. Facultad de Ciencias Exactas Físicas y Naturales. Instituto y Museo de Ciencias Naturales. Área de Paleontología de Vertebrados; Argentina

Fil: Gutierrez, Pedro Raul. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina

Country
Argentina
Keywords

https://purl.org/becyt/ford/1.5, TUPE, PATQUÍA, RÍO FRANCIA, NEOPALEOZOICO, https://purl.org/becyt/ford/1

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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