El sistema de plataforma fangosa-delta (Silúrico-Devónico) de la Formación Río Seco de los Castaños, Bloque de San Rafael, Mendoza

The Rio Seco Fm is a distal (below wave base) to proximal silty-siliciclastic marine platform-deltaic system due to the relatively scarce diversity of environments, the dominance of fine to medium sedimentary grain sizes, the lack of tractive sedimentary structures, and the important thickness of th...

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Autores principales: Manassero, Marcelo Jorge, Cingolani, Carlos Alberto, Uriz, Norberto Javier
Formato: Objeto de conferencia
Lenguaje:Español
Publicado: 2006
Materias:
Geología
Formación
Sedimentos
Estratigrafía
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/157636
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SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-157636
record_format dspace
spelling I19-R120-10915-1576362023-09-15T04:07:05Z http://sedici.unlp.edu.ar/handle/10915/157636 El sistema de plataforma fangosa-delta (Silúrico-Devónico) de la Formación Río Seco de los Castaños, Bloque de San Rafael, Mendoza Manassero, Marcelo Jorge Cingolani, Carlos Alberto Uriz, Norberto Javier 2006 2006 2023-09-14T17:36:27Z es Geología Formación Sedimentos Estratigrafía The Rio Seco Fm is a distal (below wave base) to proximal silty-siliciclastic marine platform-deltaic system due to the relatively scarce diversity of environments, the dominance of fine to medium sedimentary grain sizes, the lack of tractive sedimentary structures, and the important thickness of the beds associated also to local gravity flow proceses. In this unit, the sedimentary input was continuos, due to the absence of internal discontinuities, the basin was widespread, and the paleo-slope was very small (less than 1%). The dominant processes acting on this environment, were wave and storm action, prevailing the settling of fines over the tractive processes. The source areas were located to the east, close to the study area due to the abundance of micas within the framework of the sandstones. The presence of plant debry, in the Atuel and Lomitas Negras sections suggests also, closer vegetated areas. The hidraulic regimes were moderate and the sea level changes in the sequence have generated very few sedimentary unconformities, but widespread lateral bed continuity. The sandstone petrography and the scanning electron microscopy (SEM) data show mainly inmature arkosic wackes with both a recycled orogen and continental block provenances The trace fossil data with shallower ichnofacies to the east and Nerites to the west is coherent with the lithofacies interpretation of deeper sectors of the basin located to the west. Two new lithofacies: conglomerate channels and an organic matter rich bed are described here as new relevant sedimentological characteristics. Similar siliciclastic environment interpreted as overfeed sedimentary system with great thickness (high sedimentary rates) and low textural maturity have been described by other authors within the Precordillera Terrain for both the Silurian and the Devonian. Centro de Investigaciones Geológicas Objeto de conferencia Objeto de conferencia http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Español
topic Geología
Formación
Sedimentos
Estratigrafía
spellingShingle Geología
Formación
Sedimentos
Estratigrafía
Manassero, Marcelo Jorge
Cingolani, Carlos Alberto
Uriz, Norberto Javier
El sistema de plataforma fangosa-delta (Silúrico-Devónico) de la Formación Río Seco de los Castaños, Bloque de San Rafael, Mendoza
topic_facet Geología
Formación
Sedimentos
Estratigrafía
description The Rio Seco Fm is a distal (below wave base) to proximal silty-siliciclastic marine platform-deltaic system due to the relatively scarce diversity of environments, the dominance of fine to medium sedimentary grain sizes, the lack of tractive sedimentary structures, and the important thickness of the beds associated also to local gravity flow proceses. In this unit, the sedimentary input was continuos, due to the absence of internal discontinuities, the basin was widespread, and the paleo-slope was very small (less than 1%). The dominant processes acting on this environment, were wave and storm action, prevailing the settling of fines over the tractive processes. The source areas were located to the east, close to the study area due to the abundance of micas within the framework of the sandstones. The presence of plant debry, in the Atuel and Lomitas Negras sections suggests also, closer vegetated areas. The hidraulic regimes were moderate and the sea level changes in the sequence have generated very few sedimentary unconformities, but widespread lateral bed continuity. The sandstone petrography and the scanning electron microscopy (SEM) data show mainly inmature arkosic wackes with both a recycled orogen and continental block provenances The trace fossil data with shallower ichnofacies to the east and Nerites to the west is coherent with the lithofacies interpretation of deeper sectors of the basin located to the west. Two new lithofacies: conglomerate channels and an organic matter rich bed are described here as new relevant sedimentological characteristics. Similar siliciclastic environment interpreted as overfeed sedimentary system with great thickness (high sedimentary rates) and low textural maturity have been described by other authors within the Precordillera Terrain for both the Silurian and the Devonian.
format Objeto de conferencia
Objeto de conferencia
author Manassero, Marcelo Jorge
Cingolani, Carlos Alberto
Uriz, Norberto Javier
author_facet Manassero, Marcelo Jorge
Cingolani, Carlos Alberto
Uriz, Norberto Javier
author_sort Manassero, Marcelo Jorge
title El sistema de plataforma fangosa-delta (Silúrico-Devónico) de la Formación Río Seco de los Castaños, Bloque de San Rafael, Mendoza
title_short El sistema de plataforma fangosa-delta (Silúrico-Devónico) de la Formación Río Seco de los Castaños, Bloque de San Rafael, Mendoza
title_full El sistema de plataforma fangosa-delta (Silúrico-Devónico) de la Formación Río Seco de los Castaños, Bloque de San Rafael, Mendoza
title_fullStr El sistema de plataforma fangosa-delta (Silúrico-Devónico) de la Formación Río Seco de los Castaños, Bloque de San Rafael, Mendoza
title_full_unstemmed El sistema de plataforma fangosa-delta (Silúrico-Devónico) de la Formación Río Seco de los Castaños, Bloque de San Rafael, Mendoza
title_sort el sistema de plataforma fangosa-delta (silúrico-devónico) de la formación río seco de los castaños, bloque de san rafael, mendoza
publishDate 2006
url http://sedici.unlp.edu.ar/handle/10915/157636
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