Geocronología U-Pb SHRIMP y geoquímica de una adakita mesoproterozoica en el bloque San Rafael (Mendoza, Argentina): contexto geotectónico

Autores
Galindo, Carmen; Casquet, Cesar; Baldo, Edgardo G. A.; Pankhurst, Robert; Rapela, Carlos Washington; Dahlquist, Juan A.; Fanning, Mark
Año de publicación
2017
Idioma
español castellano
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
U-Pb SHRIMP geochronology and geochemistry of a Mesoproterozoic adakite from the Bloque San Rafael, Mendoza, Argentina: Geotectonic context. In the Ponón Trehue area, within the Mesoproterozoic of San Rafael block, an Adakite orthogneis with a Na2O / K2O = 5.3 ratio, an Eu positive anomaly (Eu/Eu * = 1.83), low Content in REE (~REE = 34.9 ppm) anda marked fractionation ([La/ Yb] N = 16.1) was recognized. It also shows low content in the HREE anda SrN ratio= 87.8. Isotopically it corresponds to a juvenile magmatic rock, ( 87Sr / 86Sr1,2aa = 0,7031 and i::Nd = +4.44) with a model age Nd TDM = 1260 Ma anda crystallization age of 1208.8 ± 8.8 Ma (2°7Pb/2°6Pb SHRIMP age in zircon). This magmatism would represent a period of subduction and accretion of oceanic terrane temporarily correlated with the beginning ofthe Shawinigan orogenesis (1220 - 1200 Ma), ofthe Grenville orogenic cycle and culminating with the formation ofthe Rodinia supercontinent.
Centro de Investigaciones Geológicas
Materia
Geología
Trondhjemita
Basamento Grenvilliano
Bloque San Rafael
Orogenia Shawinigan
Trondhjemite
Grenvillian basement
San Rafael Block
Shawinigan Orogénesis
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/190658
Acceder
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network_name_str SEDICI (UNLP)
spelling Geocronología U-Pb SHRIMP y geoquímica de una adakita mesoproterozoica en el bloque San Rafael (Mendoza, Argentina): contexto geotectónicoGalindo, CarmenCasquet, CesarBaldo, Edgardo G. A.Pankhurst, RobertRapela, Carlos WashingtonDahlquist, Juan A.Fanning, MarkGeologíaTrondhjemitaBasamento GrenvillianoBloque San RafaelOrogenia ShawiniganTrondhjemiteGrenvillian basementSan Rafael BlockShawinigan OrogénesisU-Pb SHRIMP geochronology and geochemistry of a Mesoproterozoic adakite from the Bloque San Rafael, Mendoza, Argentina: Geotectonic context. In the Ponón Trehue area, within the Mesoproterozoic of San Rafael block, an Adakite orthogneis with a Na2O / K2O = 5.3 ratio, an Eu positive anomaly (Eu/Eu * = 1.83), low Content in REE (~REE = 34.9 ppm) anda marked fractionation ([La/ Yb] N = 16.1) was recognized. It also shows low content in the HREE anda SrN ratio= 87.8. Isotopically it corresponds to a juvenile magmatic rock, ( 87Sr / 86Sr1,2aa = 0,7031 and i::Nd = +4.44) with a model age Nd TDM = 1260 Ma anda crystallization age of 1208.8 ± 8.8 Ma (2°7Pb/2°6Pb SHRIMP age in zircon). This magmatism would represent a period of subduction and accretion of oceanic terrane temporarily correlated with the beginning ofthe Shawinigan orogenesis (1220 - 1200 Ma), ofthe Grenville orogenic cycle and culminating with the formation ofthe Rodinia supercontinent.Centro de Investigaciones Geológicas2017-08info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionObjeto de conferenciahttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/190658spainfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2026-02-26T11:39:56Zoai:sedici.unlp.edu.ar:10915/190658Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292026-02-26 11:39:56.851SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Geocronología U-Pb SHRIMP y geoquímica de una adakita mesoproterozoica en el bloque San Rafael (Mendoza, Argentina): contexto geotectónico
title Geocronología U-Pb SHRIMP y geoquímica de una adakita mesoproterozoica en el bloque San Rafael (Mendoza, Argentina): contexto geotectónico
spellingShingle Geocronología U-Pb SHRIMP y geoquímica de una adakita mesoproterozoica en el bloque San Rafael (Mendoza, Argentina): contexto geotectónico
Galindo, Carmen
Geología
Trondhjemita
Basamento Grenvilliano
Bloque San Rafael
Orogenia Shawinigan
Trondhjemite
Grenvillian basement
San Rafael Block
Shawinigan Orogénesis
title_short Geocronología U-Pb SHRIMP y geoquímica de una adakita mesoproterozoica en el bloque San Rafael (Mendoza, Argentina): contexto geotectónico
title_full Geocronología U-Pb SHRIMP y geoquímica de una adakita mesoproterozoica en el bloque San Rafael (Mendoza, Argentina): contexto geotectónico
title_fullStr Geocronología U-Pb SHRIMP y geoquímica de una adakita mesoproterozoica en el bloque San Rafael (Mendoza, Argentina): contexto geotectónico
title_full_unstemmed Geocronología U-Pb SHRIMP y geoquímica de una adakita mesoproterozoica en el bloque San Rafael (Mendoza, Argentina): contexto geotectónico
title_sort Geocronología U-Pb SHRIMP y geoquímica de una adakita mesoproterozoica en el bloque San Rafael (Mendoza, Argentina): contexto geotectónico
dc.creator.none.fl_str_mv Galindo, Carmen
Casquet, Cesar
Baldo, Edgardo G. A.
Pankhurst, Robert
Rapela, Carlos Washington
Dahlquist, Juan A.
Fanning, Mark
author Galindo, Carmen
author_facet Galindo, Carmen
Casquet, Cesar
Baldo, Edgardo G. A.
Pankhurst, Robert
Rapela, Carlos Washington
Dahlquist, Juan A.
Fanning, Mark
author_role author
author2 Casquet, Cesar
Baldo, Edgardo G. A.
Pankhurst, Robert
Rapela, Carlos Washington
Dahlquist, Juan A.
Fanning, Mark
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Geología
Trondhjemita
Basamento Grenvilliano
Bloque San Rafael
Orogenia Shawinigan
Trondhjemite
Grenvillian basement
San Rafael Block
Shawinigan Orogénesis
topic Geología
Trondhjemita
Basamento Grenvilliano
Bloque San Rafael
Orogenia Shawinigan
Trondhjemite
Grenvillian basement
San Rafael Block
Shawinigan Orogénesis
dc.description.none.fl_txt_mv U-Pb SHRIMP geochronology and geochemistry of a Mesoproterozoic adakite from the Bloque San Rafael, Mendoza, Argentina: Geotectonic context. In the Ponón Trehue area, within the Mesoproterozoic of San Rafael block, an Adakite orthogneis with a Na2O / K2O = 5.3 ratio, an Eu positive anomaly (Eu/Eu * = 1.83), low Content in REE (~REE = 34.9 ppm) anda marked fractionation ([La/ Yb] N = 16.1) was recognized. It also shows low content in the HREE anda SrN ratio= 87.8. Isotopically it corresponds to a juvenile magmatic rock, ( 87Sr / 86Sr1,2aa = 0,7031 and i::Nd = +4.44) with a model age Nd TDM = 1260 Ma anda crystallization age of 1208.8 ± 8.8 Ma (2°7Pb/2°6Pb SHRIMP age in zircon). This magmatism would represent a period of subduction and accretion of oceanic terrane temporarily correlated with the beginning ofthe Shawinigan orogenesis (1220 - 1200 Ma), ofthe Grenville orogenic cycle and culminating with the formation ofthe Rodinia supercontinent.
Centro de Investigaciones Geológicas
description U-Pb SHRIMP geochronology and geochemistry of a Mesoproterozoic adakite from the Bloque San Rafael, Mendoza, Argentina: Geotectonic context. In the Ponón Trehue area, within the Mesoproterozoic of San Rafael block, an Adakite orthogneis with a Na2O / K2O = 5.3 ratio, an Eu positive anomaly (Eu/Eu * = 1.83), low Content in REE (~REE = 34.9 ppm) anda marked fractionation ([La/ Yb] N = 16.1) was recognized. It also shows low content in the HREE anda SrN ratio= 87.8. Isotopically it corresponds to a juvenile magmatic rock, ( 87Sr / 86Sr1,2aa = 0,7031 and i::Nd = +4.44) with a model age Nd TDM = 1260 Ma anda crystallization age of 1208.8 ± 8.8 Ma (2°7Pb/2°6Pb SHRIMP age in zircon). This magmatism would represent a period of subduction and accretion of oceanic terrane temporarily correlated with the beginning ofthe Shawinigan orogenesis (1220 - 1200 Ma), ofthe Grenville orogenic cycle and culminating with the formation ofthe Rodinia supercontinent.
publishDate 2017
dc.date.none.fl_str_mv 2017-08
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