A Holocene tephra layer within coastal aeolian deposits north of Caleta Olivia (Santa Cruz Province, Argentina)

In this paper we illustrate the stratigraphy, geochronology, and geochemistry (major, minor, trace elements and Sr-isotopes) of a Holocene tephra layer found within coastal sedimentary deposits north of Caleta Olivia (Santa Cruz Province, Argentina). The stratigraphic succession comprises beach depo...

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Autores principales: Zanchetta, Giovanni, Pappalardo, Marta, Di Roberto, Alessio, Bini, Monica, Arienzo, Ilenia, Isola, Ilaria, Ribolini, Adriano, Boretto, Gabriella, Fucks, Enrique Eduardo, Mele, Daniela, D'Orazio, Massimo, Marzaioli, Fabio, Passariello, Isabella
Formato: Articulo
Lenguaje:Inglés
Publicado: 2021
Materias:
Geología
Tephra
Hudson volcano
H2 eruption
Holocene
Atlantic Patagonia
Caleta Olivia
Tefra (Vulcanología)
Volcán Hudson
Erupción H2
Holoceno
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/123442
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-123442
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Geología
Tephra
Hudson volcano
H2 eruption
Holocene
Atlantic Patagonia
Caleta Olivia
Tefra (Vulcanología)
Volcán Hudson
Erupción H2
Holoceno
spellingShingle Geología
Tephra
Hudson volcano
H2 eruption
Holocene
Atlantic Patagonia
Caleta Olivia
Tefra (Vulcanología)
Volcán Hudson
Erupción H2
Holoceno
Zanchetta, Giovanni
Pappalardo, Marta
Di Roberto, Alessio
Bini, Monica
Arienzo, Ilenia
Isola, Ilaria
Ribolini, Adriano
Boretto, Gabriella
Fucks, Enrique Eduardo
Mele, Daniela
D'Orazio, Massimo
Marzaioli, Fabio
Passariello, Isabella
A Holocene tephra layer within coastal aeolian deposits north of Caleta Olivia (Santa Cruz Province, Argentina)
topic_facet Geología
Tephra
Hudson volcano
H2 eruption
Holocene
Atlantic Patagonia
Caleta Olivia
Tefra (Vulcanología)
Volcán Hudson
Erupción H2
Holoceno
description In this paper we illustrate the stratigraphy, geochronology, and geochemistry (major, minor, trace elements and Sr-isotopes) of a Holocene tephra layer found within coastal sedimentary deposits north of Caleta Olivia (Santa Cruz Province, Argentina). The stratigraphic succession comprises beach deposits with basal erosive surface resting on the local substrate (“Formacion Patagonia”) followed by a poorly developed paleosoil. The paleosoil is covered by a lenticular fine-grained (Mdφ: 5.2, 0.027 mm), well sorted (σφ: 1.2) volcanic ash layer and aeolian sands. The geochemical composition of shard fragments points to an origin from the Hudson volcano, located in the southern Andes, ca. 400 km to the west. The geochemistry, Sr-isotopes and the radiometric constraints (younger than the age of the underlying marine layer dated at ca. 4,100 a cal BP) further allow correlating this tephra with the so-called H2 eruption (ca. 3,900 a cal BP). This finding is of interest owing to the poor preservation potential of tephra within the Late Holocene sedimentary deposits of the Atlantic coast of Patagonia and represents the first finding of H2 eruption in this area, improving our knowledge of the dispersion of the fine-grained distal deposit of the Hudson volcanic explosive activity, thus allowing a better estimate of the eruptive dynamics and the risks associated with the Hudson volcano.
format Articulo
Articulo
author Zanchetta, Giovanni
Pappalardo, Marta
Di Roberto, Alessio
Bini, Monica
Arienzo, Ilenia
Isola, Ilaria
Ribolini, Adriano
Boretto, Gabriella
Fucks, Enrique Eduardo
Mele, Daniela
D'Orazio, Massimo
Marzaioli, Fabio
Passariello, Isabella
author_facet Zanchetta, Giovanni
Pappalardo, Marta
Di Roberto, Alessio
Bini, Monica
Arienzo, Ilenia
Isola, Ilaria
Ribolini, Adriano
Boretto, Gabriella
Fucks, Enrique Eduardo
Mele, Daniela
D'Orazio, Massimo
Marzaioli, Fabio
Passariello, Isabella
author_sort Zanchetta, Giovanni
title A Holocene tephra layer within coastal aeolian deposits north of Caleta Olivia (Santa Cruz Province, Argentina)
title_short A Holocene tephra layer within coastal aeolian deposits north of Caleta Olivia (Santa Cruz Province, Argentina)
title_full A Holocene tephra layer within coastal aeolian deposits north of Caleta Olivia (Santa Cruz Province, Argentina)
title_fullStr A Holocene tephra layer within coastal aeolian deposits north of Caleta Olivia (Santa Cruz Province, Argentina)
title_full_unstemmed A Holocene tephra layer within coastal aeolian deposits north of Caleta Olivia (Santa Cruz Province, Argentina)
title_sort holocene tephra layer within coastal aeolian deposits north of caleta olivia (santa cruz province, argentina)
publishDate 2021
url http://sedici.unlp.edu.ar/handle/10915/123442
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