Stratigraphic architecture and paleosols as basin correlation tools of the early Paleogene infill in central–south Patagonia, Golfo San Jorge Basin, Argentinean Patagonia

The Paleogene infill of the eastern Golfo San Jorge Basin, Patagonia, Argentina, is composed of marine (Salamanca Formation) and terrestrial (Grupo Rio Chico and lower Sarmiento Formation) deposits. The Rio Chico Group is a fluvial, pedogenically modified succession interlayered with eolian volcanic...

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Detalles Bibliográficos
Autores principales: Raigemborn, María Sol, Beilinson, Elisa
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 2020
Materias:
Geología
Río Chico Group
Non-marine Sequence Stratigraphy
System 47 Tracts
Ultisol-like paleosols
Allogenic Controls
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/128348
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-128348
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Geología
Río Chico Group
Non-marine Sequence Stratigraphy
System 47 Tracts
Ultisol-like paleosols
Allogenic Controls
spellingShingle Geología
Río Chico Group
Non-marine Sequence Stratigraphy
System 47 Tracts
Ultisol-like paleosols
Allogenic Controls
Raigemborn, María Sol
Beilinson, Elisa
Stratigraphic architecture and paleosols as basin correlation tools of the early Paleogene infill in central–south Patagonia, Golfo San Jorge Basin, Argentinean Patagonia
topic_facet Geología
Río Chico Group
Non-marine Sequence Stratigraphy
System 47 Tracts
Ultisol-like paleosols
Allogenic Controls
description The Paleogene infill of the eastern Golfo San Jorge Basin, Patagonia, Argentina, is composed of marine (Salamanca Formation) and terrestrial (Grupo Rio Chico and lower Sarmiento Formation) deposits. The Rio Chico Group is a fluvial, pedogenically modified succession interlayered with eolian volcaniclastic deposits during the Eocene. Several authors have highlighted the stratigraphic significance and usefulness of strongly developed paleosols in the definition of sequence stratigraphic studies. Even though the area hosts abundant geological and paleopedological data, no large-scale (i.e., basin-scale) stratigraphic architectural correlation including paleosols and relationships within the sequence stratigraphic context had hitherto been carried out. By integrating previously published and unpublished data sets, this paper proposes a sequence stratigraphic framework for the middle Danian–middle Eocene successions of the eastern Golfo San Jorge Basin. Here, spatio-temporal changes in fluvial/alluvial architecture of the Paleogene infill allow us to define four depositional sequences (S), limited by sequence boundaries (SB) that internally presents a low-accommodation system tract (LAST), and a high-accommodation system tract (HAST). Part of these sequences occur as fining-upwards fluvial successions that are pedogenically modified on top by strongly developed paleosols, or are erosively overlain by the coarse-grained base of the following sequence without the development of well-developed paleosols. The sedimentological and paleopedological analysis of the four sequences identified for the early Paleogene infill of the basin indicates that the interplay between subsidence, base level, and climate controlled both fluvial style and landscape evolution, as well as soil development. Volcaniclastic supply also played a significant role, especially during the Eocene.
format Articulo
Preprint
author Raigemborn, María Sol
Beilinson, Elisa
author_facet Raigemborn, María Sol
Beilinson, Elisa
author_sort Raigemborn, María Sol
title Stratigraphic architecture and paleosols as basin correlation tools of the early Paleogene infill in central–south Patagonia, Golfo San Jorge Basin, Argentinean Patagonia
title_short Stratigraphic architecture and paleosols as basin correlation tools of the early Paleogene infill in central–south Patagonia, Golfo San Jorge Basin, Argentinean Patagonia
title_full Stratigraphic architecture and paleosols as basin correlation tools of the early Paleogene infill in central–south Patagonia, Golfo San Jorge Basin, Argentinean Patagonia
title_fullStr Stratigraphic architecture and paleosols as basin correlation tools of the early Paleogene infill in central–south Patagonia, Golfo San Jorge Basin, Argentinean Patagonia
title_full_unstemmed Stratigraphic architecture and paleosols as basin correlation tools of the early Paleogene infill in central–south Patagonia, Golfo San Jorge Basin, Argentinean Patagonia
title_sort stratigraphic architecture and paleosols as basin correlation tools of the early paleogene infill in central–south patagonia, golfo san jorge basin, argentinean patagonia
publishDate 2020
url http://sedici.unlp.edu.ar/handle/10915/128348
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