The Mesoproterozoic Maz terrane in the Western Sierras Pampeanas, Argentina, equivalent to the Arequipa-Antofalla block of southern Peru? : Implications for West Gondwana margin evolution

The rocks of Sierra de Maz and Sierra del Espinal (Western Sierras Pampeanas) represent pre-Famatinian (Ordovician) basement. Isotope compositions (Nd and Pb) of metasedimentary rocks and SHRIMP U–Pb dating of detrital zircons, combined with other geological evidence, show that three parallel N–S do...

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Autores: Casquet, César, Pankhurst, Robert J., Rapela, Carlos Washington, Galindo, Carmen, Fanning, Christopher, Chiaradia, Massimo, Baldo, Edgardo G., Gonzalez-Casado, Jose M, Dahlquist, Juan A.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2008
País:Argentina
Institución:Universidad Nacional de La Plata
Repositorio:SEDICI (UNLP)
Idioma:inglés
OAI Identifier:oai:sedici.unlp.edu.ar:10915/138124
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/138124
Access Level:acceso abierto
Palabra clave:Geología
Sierras Pampeanas
U-Pb SHRIl\1P zircon dating
Nd isotopes
Pb isotopes
Gondwana
Grenville
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spelling The Mesoproterozoic Maz terrane in the Western Sierras Pampeanas, Argentina, equivalent to the Arequipa-Antofalla block of southern Peru? : Implications for West Gondwana margin evolutionCasquet, CésarPankhurst, Robert J.Rapela, Carlos WashingtonGalindo, CarmenFanning, ChristopherChiaradia, MassimoBaldo, Edgardo G.Gonzalez-Casado, Jose MDahlquist, Juan A.GeologíaSierras PampeanasU-Pb SHRIl\1P zircon datingNd isotopesPb isotopesGondwanaGrenvilleThe rocks of Sierra de Maz and Sierra del Espinal (Western Sierras Pampeanas) represent pre-Famatinian (Ordovician) basement. Isotope compositions (Nd and Pb) of metasedimentary rocks and SHRIMP U–Pb dating of detrital zircons, combined with other geological evidence, show that three parallel N–S domains can be recognized. The central Maz Domain contains pre-Grenvillian metasedimentary rocks deposited between 1.2 and 1.6 Ga, that underwent Grenvillian granulite facies metamorphism and were intruded by mafic igneous rocks and massif-type anorthosites. Metasedimentary rocks have high Nd TDM ages (1.7–2.7 Ga) and very radiogenic Pb (μ = 9.8–10.2), suggesting provenance from reworked early Proterozoic or Archean continental crust. The domains to the east and west of the Maz Domain consist of three metasedimentary sequences with Nd TDM ages between 1.2 and 1.6 Ga and variably radiogenic Pb (μ = 9.6–10.0). U–Pb SHRIMP dating of detrital zircons, Nd TDM model ages and comparison with other data suggest that these sequences are post-Grenvillian, i.e., Neoproterozoic and/or early Paleozoic. The Maz Domain is interpreted as a suspect terrane similar to the northern Arequipa–Antofalla craton that forms the basement of the Central Andes; both underwent Grenville-age orogeny and were probably once continuous along the western margin of Amazonia (West Gondwana).Centro de Investigaciones Geológicas2008info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf163-175http://sedici.unlp.edu.ar/handle/10915/138124enginfo:eu-repo/semantics/altIdentifier/issn/1342-937xinfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.gr.2007.04.005info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/Creative Commons Attribution 4.0 International (CC BY 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2024-05-08T13:10:35Zoai:sedici.unlp.edu.ar:10915/138124Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292024-05-08 13:10:36.035SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv The Mesoproterozoic Maz terrane in the Western Sierras Pampeanas, Argentina, equivalent to the Arequipa-Antofalla block of southern Peru? : Implications for West Gondwana margin evolution
title The Mesoproterozoic Maz terrane in the Western Sierras Pampeanas, Argentina, equivalent to the Arequipa-Antofalla block of southern Peru? : Implications for West Gondwana margin evolution
spellingShingle The Mesoproterozoic Maz terrane in the Western Sierras Pampeanas, Argentina, equivalent to the Arequipa-Antofalla block of southern Peru? : Implications for West Gondwana margin evolution
Casquet, César
Geología
Sierras Pampeanas
U-Pb SHRIl\1P zircon dating
Nd isotopes
Pb isotopes
Gondwana
Grenville
title_short The Mesoproterozoic Maz terrane in the Western Sierras Pampeanas, Argentina, equivalent to the Arequipa-Antofalla block of southern Peru? : Implications for West Gondwana margin evolution
title_full The Mesoproterozoic Maz terrane in the Western Sierras Pampeanas, Argentina, equivalent to the Arequipa-Antofalla block of southern Peru? : Implications for West Gondwana margin evolution
title_fullStr The Mesoproterozoic Maz terrane in the Western Sierras Pampeanas, Argentina, equivalent to the Arequipa-Antofalla block of southern Peru? : Implications for West Gondwana margin evolution
title_full_unstemmed The Mesoproterozoic Maz terrane in the Western Sierras Pampeanas, Argentina, equivalent to the Arequipa-Antofalla block of southern Peru? : Implications for West Gondwana margin evolution
title_sort The Mesoproterozoic Maz terrane in the Western Sierras Pampeanas, Argentina, equivalent to the Arequipa-Antofalla block of southern Peru? : Implications for West Gondwana margin evolution
dc.creator.none.fl_str_mv Casquet, César
Pankhurst, Robert J.
Rapela, Carlos Washington
Galindo, Carmen
Fanning, Christopher
Chiaradia, Massimo
Baldo, Edgardo G.
Gonzalez-Casado, Jose M
Dahlquist, Juan A.
author Casquet, César
author_facet Casquet, César
Pankhurst, Robert J.
Rapela, Carlos Washington
Galindo, Carmen
Fanning, Christopher
Chiaradia, Massimo
Baldo, Edgardo G.
Gonzalez-Casado, Jose M
Dahlquist, Juan A.
author_role author
author2 Pankhurst, Robert J.
Rapela, Carlos Washington
Galindo, Carmen
Fanning, Christopher
Chiaradia, Massimo
Baldo, Edgardo G.
Gonzalez-Casado, Jose M
Dahlquist, Juan A.
author2_role author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Geología
Sierras Pampeanas
U-Pb SHRIl\1P zircon dating
Nd isotopes
Pb isotopes
Gondwana
Grenville
topic Geología
Sierras Pampeanas
U-Pb SHRIl\1P zircon dating
Nd isotopes
Pb isotopes
Gondwana
Grenville
description The rocks of Sierra de Maz and Sierra del Espinal (Western Sierras Pampeanas) represent pre-Famatinian (Ordovician) basement. Isotope compositions (Nd and Pb) of metasedimentary rocks and SHRIMP U–Pb dating of detrital zircons, combined with other geological evidence, show that three parallel N–S domains can be recognized. The central Maz Domain contains pre-Grenvillian metasedimentary rocks deposited between 1.2 and 1.6 Ga, that underwent Grenvillian granulite facies metamorphism and were intruded by mafic igneous rocks and massif-type anorthosites. Metasedimentary rocks have high Nd TDM ages (1.7–2.7 Ga) and very radiogenic Pb (μ = 9.8–10.2), suggesting provenance from reworked early Proterozoic or Archean continental crust. The domains to the east and west of the Maz Domain consist of three metasedimentary sequences with Nd TDM ages between 1.2 and 1.6 Ga and variably radiogenic Pb (μ = 9.6–10.0). U–Pb SHRIMP dating of detrital zircons, Nd TDM model ages and comparison with other data suggest that these sequences are post-Grenvillian, i.e., Neoproterozoic and/or early Paleozoic. The Maz Domain is interpreted as a suspect terrane similar to the northern Arequipa–Antofalla craton that forms the basement of the Central Andes; both underwent Grenville-age orogeny and were probably once continuous along the western margin of Amazonia (West Gondwana).
publishDate 2008
dc.date.none.fl_str_mv 2008
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/138124
url http://sedici.unlp.edu.ar/handle/10915/138124
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/1342-937x
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.gr.2007.04.005
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/4.0/
Creative Commons Attribution 4.0 International (CC BY 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/4.0/
Creative Commons Attribution 4.0 International (CC BY 4.0)
dc.format.none.fl_str_mv application/pdf
163-175
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
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instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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