Provenance analysis of Devonian peripheral foreland basins in SW Gondwana, case of the Gualilán Group, Precordillera Argentina

We carried out a sedimentary provenance analysis of the Devonian Gualilan Group, Central Precordillera of western Argentina, focusing on the siliciclastic record of the Talacasto (Lower Devonian) and the Punta Negra (Lower-Middle Devonian) formations. Provenance is determined based on petrography, h...

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Detalles Bibliográficos
Autores principales: Arnol, Jonatan Ariel, Uriz, Norberto Javier, Cingolani, Carlos Alberto, Stipp Basei, Miguel Angelo, Abre, Paulina
Formato: Articulo
Lenguaje:Inglés
Publicado: 2020
Materias:
Geología
Provenance
Devonian Gualilán Group
Detrital zircon ages
Precordillera
SW Gondwana
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/138768
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-138768
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Geología
Provenance
Devonian Gualilán Group
Detrital zircon ages
Precordillera
SW Gondwana
spellingShingle Geología
Provenance
Devonian Gualilán Group
Detrital zircon ages
Precordillera
SW Gondwana
Arnol, Jonatan Ariel
Uriz, Norberto Javier
Cingolani, Carlos Alberto
Stipp Basei, Miguel Angelo
Abre, Paulina
Provenance analysis of Devonian peripheral foreland basins in SW Gondwana, case of the Gualilán Group, Precordillera Argentina
topic_facet Geología
Provenance
Devonian Gualilán Group
Detrital zircon ages
Precordillera
SW Gondwana
description We carried out a sedimentary provenance analysis of the Devonian Gualilan Group, Central Precordillera of western Argentina, focusing on the siliciclastic record of the Talacasto (Lower Devonian) and the Punta Negra (Lower-Middle Devonian) formations. Provenance is determined based on petrography, heavy minerals, whole-rock geochemistry, Sm–Nd isotopes, and U–Pb detrital zircon dating. Sandstones are composed of quartz, feldspar, and metamorphic and plutonic lithoclasts. The Gualilan Group underwent moderate weathering indicated by CIA values and Th/U ratios below 76 and 4.9, respectively. Th/Sc, Zr/Sc, Cr/V and La/Th ratios, negative Eu-anomalies and REE patterns point to felsic source compositions. The heavy minerals and zircon morphologies indicate that high-grade metamorphic and igneous rocks provided the bulk of detritus. TDM ages between 1.40 and 1.46 Ga and eNd(t) values ranging from − 9.21 to − 11.13 constrain the signature of the sources. U–Pb detrital zircon ages for the Talacasto Formation are equally distributed between the Famatinian (Late Cambrian–Late Devonian), Pampean–Brazilian (Neoproterozoic–Early Cambrian) and Grenvillian-Sunsas (Mesoproterozoic) orogenic cycles. Detrital zircon ages of the Punta Negra Formation were dominantly supplied from Mesoproterozoic rocks, linked to the Grenvillian-Sunsas orogeny. The data indicate a provenance from rocks located eastwards of the basin represented by the basement of the Pampean Ranges. The peripheral foreland basin developed during the post-collisional regime that followed the accretion of Cuyania against Gondwana. Whereas eastern and western Pampean Ranges provided detritus to the Talacasto Formation, the Punta Negra Formation was sourced by the western Pampean Ranges, implying exhumation and erosion of such basement during the Devonian.
format Articulo
Articulo
author Arnol, Jonatan Ariel
Uriz, Norberto Javier
Cingolani, Carlos Alberto
Stipp Basei, Miguel Angelo
Abre, Paulina
author_facet Arnol, Jonatan Ariel
Uriz, Norberto Javier
Cingolani, Carlos Alberto
Stipp Basei, Miguel Angelo
Abre, Paulina
author_sort Arnol, Jonatan Ariel
title Provenance analysis of Devonian peripheral foreland basins in SW Gondwana, case of the Gualilán Group, Precordillera Argentina
title_short Provenance analysis of Devonian peripheral foreland basins in SW Gondwana, case of the Gualilán Group, Precordillera Argentina
title_full Provenance analysis of Devonian peripheral foreland basins in SW Gondwana, case of the Gualilán Group, Precordillera Argentina
title_fullStr Provenance analysis of Devonian peripheral foreland basins in SW Gondwana, case of the Gualilán Group, Precordillera Argentina
title_full_unstemmed Provenance analysis of Devonian peripheral foreland basins in SW Gondwana, case of the Gualilán Group, Precordillera Argentina
title_sort provenance analysis of devonian peripheral foreland basins in sw gondwana, case of the gualilán group, precordillera argentina
publishDate 2020
url http://sedici.unlp.edu.ar/handle/10915/138768
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