Age constraints on the tectonic evolution and provenance of the Pie de Palo Complex, Cuyania composite terrane and the Famatinian orogeny in the Sierra de Pie de Palo, San Juan, Ar...

Autores
Vujovich, Graciela Irene; van Staal, Cees R.; Davis, William
Año de publicación
2004
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
New U-Pb age determinations confirm earlier interpretations that the strongly deformed and metamorphosed mafic and intermediate igneous rocks of the Pie de Palo Complex represent a Mesoproterozoic fragment of suprasubduction zone oceanic crust. A gabbroic pegmatite, interpreted to have formed during arc rifting or subsequent back-arc spreading, yielded a U-Pb age of 1204 +5.3/-4. 7 Ma. Highly tectonized ultramafic-mafic cumulates, occurring at the structural base of the Pie de Palo Complex and previously interpreted to represent remnants of a primitive arc phase, prior to rifting and back-arc spreading, could not be dated, but should be older than 1204 Ma if these inferences are correct. Tabular, sill-like bodies of leucogabbro /diorite and calc-alkaline tonalite/granodiorite sills yielded ages of 1174±43 and 1169+1/-7 Ma respectively. They may represent a younger, more evolved arc phase established after arc rifting or a younger, tectonically unrelated Mesoproterozoic arc. SHRIMP-analysis of metamorphic zircon rims with low Th/U ratios in VVL 110 gave a 206Pb/238U age of 455 ± 10 Ma, similar to lower intercept dates determined by discordia lines. Combined, these data indicate that the bulk of the amphibolite facies metamorphism present in the Pie de Palo Complex was generated during the Famatinian Orogeny. Analysis of six single detrital zircon grains in a metasedimentary, quartzofeldspathic garnet-mica schist, tectonically interleaved with the igneous rocks of the Pie de Palo Complex, and tentatively correlated with the Difunta Correa metasedimentary sequence of other workers, yielded three age populations: 1150-1160 Ma; 1050-1080 Ma and 665 Ma, indicating that these sedimentary rocks were deposited during the late Neoproterozoic or Early Paleozoic. In addition, they confirm structural evidence that intercalation of rocks of the Pie de Palo Complex with isolated slivers of these sedimentary rocks is due to tectonic imbrications. These ages are also consistent with a Laurentian provenance, and earlier interpretations that these rocks once represented a sedimentary cover to the Pie de Palo Complex. The zircon population of 1050-1080 Ma could be derived from Grenville-age felsic plutons identified elsewhere in the Pie de Palo Complex by other workers. However, no evidence has been found in our samples for a Grenville-age orogenic event, invoked previously to explain accretion of the oceanic Pie de Palo Complex to Laurentia prior to the late Neoproterozoic/Early Cambrian rifting and drift of Cuyania.
Fil: Vujovich, Graciela Irene. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina
Fil: van Staal, Cees R.. Geological Survey of Canada; Canadá
Fil: Davis, William. Geological Survey of Canada; Canadá
Materia
BACK-ARC
CUYANIA
GRENVILLE
ISLAND ARC
OPHIOLITE
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
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CONICET Digital (CONICET)
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Consejo Nacional de Investigaciones Científicas y Técnicas
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oai:ri.conicet.gov.ar:11336/93714

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spelling Age constraints on the tectonic evolution and provenance of the Pie de Palo Complex, Cuyania composite terrane and the Famatinian orogeny in the Sierra de Pie de Palo, San Juan, ArgentinaVujovich, Graciela Irenevan Staal, Cees R.Davis, WilliamBACK-ARCCUYANIAGRENVILLEISLAND ARCOPHIOLITEhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1New U-Pb age determinations confirm earlier interpretations that the strongly deformed and metamorphosed mafic and intermediate igneous rocks of the Pie de Palo Complex represent a Mesoproterozoic fragment of suprasubduction zone oceanic crust. A gabbroic pegmatite, interpreted to have formed during arc rifting or subsequent back-arc spreading, yielded a U-Pb age of 1204 +5.3/-4. 7 Ma. Highly tectonized ultramafic-mafic cumulates, occurring at the structural base of the Pie de Palo Complex and previously interpreted to represent remnants of a primitive arc phase, prior to rifting and back-arc spreading, could not be dated, but should be older than 1204 Ma if these inferences are correct. Tabular, sill-like bodies of leucogabbro /diorite and calc-alkaline tonalite/granodiorite sills yielded ages of 1174±43 and 1169+1/-7 Ma respectively. They may represent a younger, more evolved arc phase established after arc rifting or a younger, tectonically unrelated Mesoproterozoic arc. SHRIMP-analysis of metamorphic zircon rims with low Th/U ratios in VVL 110 gave a 206Pb/238U age of 455 ± 10 Ma, similar to lower intercept dates determined by discordia lines. Combined, these data indicate that the bulk of the amphibolite facies metamorphism present in the Pie de Palo Complex was generated during the Famatinian Orogeny. Analysis of six single detrital zircon grains in a metasedimentary, quartzofeldspathic garnet-mica schist, tectonically interleaved with the igneous rocks of the Pie de Palo Complex, and tentatively correlated with the Difunta Correa metasedimentary sequence of other workers, yielded three age populations: 1150-1160 Ma; 1050-1080 Ma and 665 Ma, indicating that these sedimentary rocks were deposited during the late Neoproterozoic or Early Paleozoic. In addition, they confirm structural evidence that intercalation of rocks of the Pie de Palo Complex with isolated slivers of these sedimentary rocks is due to tectonic imbrications. These ages are also consistent with a Laurentian provenance, and earlier interpretations that these rocks once represented a sedimentary cover to the Pie de Palo Complex. The zircon population of 1050-1080 Ma could be derived from Grenville-age felsic plutons identified elsewhere in the Pie de Palo Complex by other workers. However, no evidence has been found in our samples for a Grenville-age orogenic event, invoked previously to explain accretion of the oceanic Pie de Palo Complex to Laurentia prior to the late Neoproterozoic/Early Cambrian rifting and drift of Cuyania.Fil: Vujovich, Graciela Irene. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; ArgentinaFil: van Staal, Cees R.. Geological Survey of Canada; CanadáFil: Davis, William. Geological Survey of Canada; CanadáElsevier Science2004-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/93714Vujovich, Graciela Irene; van Staal, Cees R.; Davis, William; Age constraints on the tectonic evolution and provenance of the Pie de Palo Complex, Cuyania composite terrane and the Famatinian orogeny in the Sierra de Pie de Palo, San Juan, Argentina; Elsevier Science; Gondwana Research; 7; 4; 12-2004; 1041-10561342-937XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1342937X05710832info:eu-repo/semantics/altIdentifier/doi/10.1016/S1342-937X(05)71083-2info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:07:54Zoai:ri.conicet.gov.ar:11336/93714instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 10:07:54.319CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Age constraints on the tectonic evolution and provenance of the Pie de Palo Complex, Cuyania composite terrane and the Famatinian orogeny in the Sierra de Pie de Palo, San Juan, Argentina
title Age constraints on the tectonic evolution and provenance of the Pie de Palo Complex, Cuyania composite terrane and the Famatinian orogeny in the Sierra de Pie de Palo, San Juan, Argentina
spellingShingle Age constraints on the tectonic evolution and provenance of the Pie de Palo Complex, Cuyania composite terrane and the Famatinian orogeny in the Sierra de Pie de Palo, San Juan, Argentina
Vujovich, Graciela Irene
BACK-ARC
CUYANIA
GRENVILLE
ISLAND ARC
OPHIOLITE
title_short Age constraints on the tectonic evolution and provenance of the Pie de Palo Complex, Cuyania composite terrane and the Famatinian orogeny in the Sierra de Pie de Palo, San Juan, Argentina
title_full Age constraints on the tectonic evolution and provenance of the Pie de Palo Complex, Cuyania composite terrane and the Famatinian orogeny in the Sierra de Pie de Palo, San Juan, Argentina
title_fullStr Age constraints on the tectonic evolution and provenance of the Pie de Palo Complex, Cuyania composite terrane and the Famatinian orogeny in the Sierra de Pie de Palo, San Juan, Argentina
title_full_unstemmed Age constraints on the tectonic evolution and provenance of the Pie de Palo Complex, Cuyania composite terrane and the Famatinian orogeny in the Sierra de Pie de Palo, San Juan, Argentina
title_sort Age constraints on the tectonic evolution and provenance of the Pie de Palo Complex, Cuyania composite terrane and the Famatinian orogeny in the Sierra de Pie de Palo, San Juan, Argentina
dc.creator.none.fl_str_mv Vujovich, Graciela Irene
van Staal, Cees R.
Davis, William
author Vujovich, Graciela Irene
author_facet Vujovich, Graciela Irene
van Staal, Cees R.
Davis, William
author_role author
author2 van Staal, Cees R.
Davis, William
author2_role author
author
dc.subject.none.fl_str_mv BACK-ARC
CUYANIA
GRENVILLE
ISLAND ARC
OPHIOLITE
topic BACK-ARC
CUYANIA
GRENVILLE
ISLAND ARC
OPHIOLITE
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv New U-Pb age determinations confirm earlier interpretations that the strongly deformed and metamorphosed mafic and intermediate igneous rocks of the Pie de Palo Complex represent a Mesoproterozoic fragment of suprasubduction zone oceanic crust. A gabbroic pegmatite, interpreted to have formed during arc rifting or subsequent back-arc spreading, yielded a U-Pb age of 1204 +5.3/-4. 7 Ma. Highly tectonized ultramafic-mafic cumulates, occurring at the structural base of the Pie de Palo Complex and previously interpreted to represent remnants of a primitive arc phase, prior to rifting and back-arc spreading, could not be dated, but should be older than 1204 Ma if these inferences are correct. Tabular, sill-like bodies of leucogabbro /diorite and calc-alkaline tonalite/granodiorite sills yielded ages of 1174±43 and 1169+1/-7 Ma respectively. They may represent a younger, more evolved arc phase established after arc rifting or a younger, tectonically unrelated Mesoproterozoic arc. SHRIMP-analysis of metamorphic zircon rims with low Th/U ratios in VVL 110 gave a 206Pb/238U age of 455 ± 10 Ma, similar to lower intercept dates determined by discordia lines. Combined, these data indicate that the bulk of the amphibolite facies metamorphism present in the Pie de Palo Complex was generated during the Famatinian Orogeny. Analysis of six single detrital zircon grains in a metasedimentary, quartzofeldspathic garnet-mica schist, tectonically interleaved with the igneous rocks of the Pie de Palo Complex, and tentatively correlated with the Difunta Correa metasedimentary sequence of other workers, yielded three age populations: 1150-1160 Ma; 1050-1080 Ma and 665 Ma, indicating that these sedimentary rocks were deposited during the late Neoproterozoic or Early Paleozoic. In addition, they confirm structural evidence that intercalation of rocks of the Pie de Palo Complex with isolated slivers of these sedimentary rocks is due to tectonic imbrications. These ages are also consistent with a Laurentian provenance, and earlier interpretations that these rocks once represented a sedimentary cover to the Pie de Palo Complex. The zircon population of 1050-1080 Ma could be derived from Grenville-age felsic plutons identified elsewhere in the Pie de Palo Complex by other workers. However, no evidence has been found in our samples for a Grenville-age orogenic event, invoked previously to explain accretion of the oceanic Pie de Palo Complex to Laurentia prior to the late Neoproterozoic/Early Cambrian rifting and drift of Cuyania.
Fil: Vujovich, Graciela Irene. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina
Fil: van Staal, Cees R.. Geological Survey of Canada; Canadá
Fil: Davis, William. Geological Survey of Canada; Canadá
description New U-Pb age determinations confirm earlier interpretations that the strongly deformed and metamorphosed mafic and intermediate igneous rocks of the Pie de Palo Complex represent a Mesoproterozoic fragment of suprasubduction zone oceanic crust. A gabbroic pegmatite, interpreted to have formed during arc rifting or subsequent back-arc spreading, yielded a U-Pb age of 1204 +5.3/-4. 7 Ma. Highly tectonized ultramafic-mafic cumulates, occurring at the structural base of the Pie de Palo Complex and previously interpreted to represent remnants of a primitive arc phase, prior to rifting and back-arc spreading, could not be dated, but should be older than 1204 Ma if these inferences are correct. Tabular, sill-like bodies of leucogabbro /diorite and calc-alkaline tonalite/granodiorite sills yielded ages of 1174±43 and 1169+1/-7 Ma respectively. They may represent a younger, more evolved arc phase established after arc rifting or a younger, tectonically unrelated Mesoproterozoic arc. SHRIMP-analysis of metamorphic zircon rims with low Th/U ratios in VVL 110 gave a 206Pb/238U age of 455 ± 10 Ma, similar to lower intercept dates determined by discordia lines. Combined, these data indicate that the bulk of the amphibolite facies metamorphism present in the Pie de Palo Complex was generated during the Famatinian Orogeny. Analysis of six single detrital zircon grains in a metasedimentary, quartzofeldspathic garnet-mica schist, tectonically interleaved with the igneous rocks of the Pie de Palo Complex, and tentatively correlated with the Difunta Correa metasedimentary sequence of other workers, yielded three age populations: 1150-1160 Ma; 1050-1080 Ma and 665 Ma, indicating that these sedimentary rocks were deposited during the late Neoproterozoic or Early Paleozoic. In addition, they confirm structural evidence that intercalation of rocks of the Pie de Palo Complex with isolated slivers of these sedimentary rocks is due to tectonic imbrications. These ages are also consistent with a Laurentian provenance, and earlier interpretations that these rocks once represented a sedimentary cover to the Pie de Palo Complex. The zircon population of 1050-1080 Ma could be derived from Grenville-age felsic plutons identified elsewhere in the Pie de Palo Complex by other workers. However, no evidence has been found in our samples for a Grenville-age orogenic event, invoked previously to explain accretion of the oceanic Pie de Palo Complex to Laurentia prior to the late Neoproterozoic/Early Cambrian rifting and drift of Cuyania.
publishDate 2004
dc.date.none.fl_str_mv 2004-12
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/93714
Vujovich, Graciela Irene; van Staal, Cees R.; Davis, William; Age constraints on the tectonic evolution and provenance of the Pie de Palo Complex, Cuyania composite terrane and the Famatinian orogeny in the Sierra de Pie de Palo, San Juan, Argentina; Elsevier Science; Gondwana Research; 7; 4; 12-2004; 1041-1056
1342-937X
CONICET Digital
CONICET
url http://hdl.handle.net/11336/93714
identifier_str_mv Vujovich, Graciela Irene; van Staal, Cees R.; Davis, William; Age constraints on the tectonic evolution and provenance of the Pie de Palo Complex, Cuyania composite terrane and the Famatinian orogeny in the Sierra de Pie de Palo, San Juan, Argentina; Elsevier Science; Gondwana Research; 7; 4; 12-2004; 1041-1056
1342-937X
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1342937X05710832
info:eu-repo/semantics/altIdentifier/doi/10.1016/S1342-937X(05)71083-2
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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