Geochemistry of metasedimentary rocks from the Puncoviscana Complex in the Mojotoro Range, NW Argentina: Implications for provenance and tectonic setting

Low-grade metasedimentary rocks from the Lower Paleozoic Puncoviscana Complex of the Mojotoro Range in NW Argentina have been analyzed for their major and trace elements - including rare earth - in order to constrain their provenance and depositional tectonic setting. They show a moderate degree of...

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Autores principales: Aparicio González, P.A., Garban, G., Hauser, N., Gigena, L.
Formato: JOUR
Materias:
Geochemistry
Mojotoro Range
Provenance
Puncoviscana Complex
Tectonic setting
active margin
chemical weathering
geochemistry
metasedimentary rock
Proterozoic
provenance
tectonic setting
Argentina
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_08959811_v78_n_p250_AparicioGonzalez
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_08959811_v78_n_p250_AparicioGonzalez
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spelling todo:paper_08959811_v78_n_p250_AparicioGonzalez2023-10-03T15:43:31Z Geochemistry of metasedimentary rocks from the Puncoviscana Complex in the Mojotoro Range, NW Argentina: Implications for provenance and tectonic setting Aparicio González, P.A. Garban, G. Hauser, N. Gigena, L. Geochemistry Mojotoro Range Provenance Puncoviscana Complex Tectonic setting active margin chemical weathering geochemistry metasedimentary rock Proterozoic provenance tectonic setting Argentina Low-grade metasedimentary rocks from the Lower Paleozoic Puncoviscana Complex of the Mojotoro Range in NW Argentina have been analyzed for their major and trace elements - including rare earth - in order to constrain their provenance and depositional tectonic setting. They show a moderate degree of chemical weathering with intermediate CIA (<75) values and can be classified as metawackes and metapelites. Provenance discrimination diagrams based on major element geochemistry and trace element ratios (i.e., Cr/V, Y/Ni, Th/Co, La/Sc, Th/Sc, Eu/Eu*) suggest that the sediments were derived from upper crustal, felsic source rocks. Tectonic setting discrimination diagrams based on major elements, immobile trace elements (i.e., La- Th- Sc and Th-Sc-Zr/10) and La/Yb vs. Eu/Eu* plots, support an active margin setting associated with a magmatic arc located to the east of the Neoproterozoic–Cambrian Pampean Brazilian arc that formed along the margin of a Mesoproterozoic craton. © 2017 JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_08959811_v78_n_p250_AparicioGonzalez
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Geochemistry
Mojotoro Range
Provenance
Puncoviscana Complex
Tectonic setting
active margin
chemical weathering
geochemistry
metasedimentary rock
Proterozoic
provenance
tectonic setting
Argentina
spellingShingle Geochemistry
Mojotoro Range
Provenance
Puncoviscana Complex
Tectonic setting
active margin
chemical weathering
geochemistry
metasedimentary rock
Proterozoic
provenance
tectonic setting
Argentina
Aparicio González, P.A.
Garban, G.
Hauser, N.
Gigena, L.
Geochemistry of metasedimentary rocks from the Puncoviscana Complex in the Mojotoro Range, NW Argentina: Implications for provenance and tectonic setting
topic_facet Geochemistry
Mojotoro Range
Provenance
Puncoviscana Complex
Tectonic setting
active margin
chemical weathering
geochemistry
metasedimentary rock
Proterozoic
provenance
tectonic setting
Argentina
description Low-grade metasedimentary rocks from the Lower Paleozoic Puncoviscana Complex of the Mojotoro Range in NW Argentina have been analyzed for their major and trace elements - including rare earth - in order to constrain their provenance and depositional tectonic setting. They show a moderate degree of chemical weathering with intermediate CIA (<75) values and can be classified as metawackes and metapelites. Provenance discrimination diagrams based on major element geochemistry and trace element ratios (i.e., Cr/V, Y/Ni, Th/Co, La/Sc, Th/Sc, Eu/Eu*) suggest that the sediments were derived from upper crustal, felsic source rocks. Tectonic setting discrimination diagrams based on major elements, immobile trace elements (i.e., La- Th- Sc and Th-Sc-Zr/10) and La/Yb vs. Eu/Eu* plots, support an active margin setting associated with a magmatic arc located to the east of the Neoproterozoic–Cambrian Pampean Brazilian arc that formed along the margin of a Mesoproterozoic craton. © 2017
format JOUR
author Aparicio González, P.A.
Garban, G.
Hauser, N.
Gigena, L.
author_facet Aparicio González, P.A.
Garban, G.
Hauser, N.
Gigena, L.
author_sort Aparicio González, P.A.
title Geochemistry of metasedimentary rocks from the Puncoviscana Complex in the Mojotoro Range, NW Argentina: Implications for provenance and tectonic setting
title_short Geochemistry of metasedimentary rocks from the Puncoviscana Complex in the Mojotoro Range, NW Argentina: Implications for provenance and tectonic setting
title_full Geochemistry of metasedimentary rocks from the Puncoviscana Complex in the Mojotoro Range, NW Argentina: Implications for provenance and tectonic setting
title_fullStr Geochemistry of metasedimentary rocks from the Puncoviscana Complex in the Mojotoro Range, NW Argentina: Implications for provenance and tectonic setting
title_full_unstemmed Geochemistry of metasedimentary rocks from the Puncoviscana Complex in the Mojotoro Range, NW Argentina: Implications for provenance and tectonic setting
title_sort geochemistry of metasedimentary rocks from the puncoviscana complex in the mojotoro range, nw argentina: implications for provenance and tectonic setting
url http://hdl.handle.net/20.500.12110/paper_08959811_v78_n_p250_AparicioGonzalez
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