Petrographical and geochemical features of the granite–pegmatite transition in the Velasco Pegmatitic District, NW Argentina

Autores
Sardi, Fernando Guillermo; Murata, Mamoru; Grosse, Pablo
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The Carboniferous post-orogenic Huaco and Sanagasta granites are located in the central sector of the Velasco Range, northwestern Argentina, and host rare-element (Be) pegmatites. They are highly fractionated peraluminous granites with porphyritic textures having variable sizes and abundances of K-feldspar megacrysts. Two different types of parental granites are recognized: a Regional Porphyritic Granite (RPG), distant from the Be-pegmatites, and an Adjacent Porphyritic Granite (APG) surrounding the Be-pegmatites. At the pegmatite margins, aplites (MA), or more rarely equigranular leucogranites, are in contact with the APG. The granite-to-pegmatite transition is characterized by a decreasing biotite/muscovite ratio and TiO2-Fe2O3t-MgO contents, which is consistent with fractional crystallization of biotite, and also by decreasing megacryst and grain size. A continuous magmatic crystallization trend from the RPG to the APG is observed, whereas the MA constitutes the earliest stage of pegmatite formation, characterized by depletion in ferromagnesian elements, calcium and some trace elements (Ba, Sr, Y, Nb, Ce, Zr, Th). However, the granite-pegmatite evolution occurred by differentiation from a common magma source.
Fil: Sardi, Fernando Guillermo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto Superior de Correlación Geológica. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Departamento de Geología. Cátedra Geología Estructural. Instituto Superior de Correlación Geológica; Argentina
Fil: Murata, Mamoru. Naruto University of Education; Japón
Fil: Grosse, Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto Superior de Correlación Geológica. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Departamento de Geología. Cátedra Geología Estructural. Instituto Superior de Correlación Geológica; Argentina
Materia
Fertile Granites
Be-Pegmatites
Marginal Aplites
Granite-Pegmatite Transition
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/88321
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/88321
network_acronym_str CONICETDig
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network_name_str CONICET Digital (CONICET)
spelling Petrographical and geochemical features of the granite–pegmatite transition in the Velasco Pegmatitic District, NW ArgentinaSardi, Fernando GuillermoMurata, MamoruGrosse, PabloFertile GranitesBe-PegmatitesMarginal AplitesGranite-Pegmatite Transitionhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The Carboniferous post-orogenic Huaco and Sanagasta granites are located in the central sector of the Velasco Range, northwestern Argentina, and host rare-element (Be) pegmatites. They are highly fractionated peraluminous granites with porphyritic textures having variable sizes and abundances of K-feldspar megacrysts. Two different types of parental granites are recognized: a Regional Porphyritic Granite (RPG), distant from the Be-pegmatites, and an Adjacent Porphyritic Granite (APG) surrounding the Be-pegmatites. At the pegmatite margins, aplites (MA), or more rarely equigranular leucogranites, are in contact with the APG. The granite-to-pegmatite transition is characterized by a decreasing biotite/muscovite ratio and TiO2-Fe2O3t-MgO contents, which is consistent with fractional crystallization of biotite, and also by decreasing megacryst and grain size. A continuous magmatic crystallization trend from the RPG to the APG is observed, whereas the MA constitutes the earliest stage of pegmatite formation, characterized by depletion in ferromagnesian elements, calcium and some trace elements (Ba, Sr, Y, Nb, Ce, Zr, Th). However, the granite-pegmatite evolution occurred by differentiation from a common magma source.Fil: Sardi, Fernando Guillermo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto Superior de Correlación Geológica. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Departamento de Geología. Cátedra Geología Estructural. Instituto Superior de Correlación Geológica; ArgentinaFil: Murata, Mamoru. Naruto University of Education; JapónFil: Grosse, Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto Superior de Correlación Geológica. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Departamento de Geología. Cátedra Geología Estructural. Instituto Superior de Correlación Geológica; ArgentinaE Schweizerbartsche Verlags2010-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/88321Sardi, Fernando Guillermo; Murata, Mamoru; Grosse, Pablo; Petrographical and geochemical features of the granite–pegmatite transition in the Velasco Pegmatitic District, NW Argentina; E Schweizerbartsche Verlags; Neues Jahrbuch für Geologie und Palaontologie - Abhandlungen; 258; 1; 6-2010; 61-710077-7749CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1127/0077-7749/2010/0085info:eu-repo/semantics/altIdentifier/url/https://www.ingentaconnect.com/content/schweiz/njbgeol/2010/00000258/00000001/art00005%3bjsessionid=ha9riag2f6na6.x-ic-live-03info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:46:55Zoai:ri.conicet.gov.ar:11336/88321instacron: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:34982025-09-29 09:46:55.323CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Petrographical and geochemical features of the granite–pegmatite transition in the Velasco Pegmatitic District, NW Argentina
title Petrographical and geochemical features of the granite–pegmatite transition in the Velasco Pegmatitic District, NW Argentina
spellingShingle Petrographical and geochemical features of the granite–pegmatite transition in the Velasco Pegmatitic District, NW Argentina
Sardi, Fernando Guillermo
Fertile Granites
Be-Pegmatites
Marginal Aplites
Granite-Pegmatite Transition
title_short Petrographical and geochemical features of the granite–pegmatite transition in the Velasco Pegmatitic District, NW Argentina
title_full Petrographical and geochemical features of the granite–pegmatite transition in the Velasco Pegmatitic District, NW Argentina
title_fullStr Petrographical and geochemical features of the granite–pegmatite transition in the Velasco Pegmatitic District, NW Argentina
title_full_unstemmed Petrographical and geochemical features of the granite–pegmatite transition in the Velasco Pegmatitic District, NW Argentina
title_sort Petrographical and geochemical features of the granite–pegmatite transition in the Velasco Pegmatitic District, NW Argentina
dc.creator.none.fl_str_mv Sardi, Fernando Guillermo
Murata, Mamoru
Grosse, Pablo
author Sardi, Fernando Guillermo
author_facet Sardi, Fernando Guillermo
Murata, Mamoru
Grosse, Pablo
author_role author
author2 Murata, Mamoru
Grosse, Pablo
author2_role author
author
dc.subject.none.fl_str_mv Fertile Granites
Be-Pegmatites
Marginal Aplites
Granite-Pegmatite Transition
topic Fertile Granites
Be-Pegmatites
Marginal Aplites
Granite-Pegmatite Transition
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The Carboniferous post-orogenic Huaco and Sanagasta granites are located in the central sector of the Velasco Range, northwestern Argentina, and host rare-element (Be) pegmatites. They are highly fractionated peraluminous granites with porphyritic textures having variable sizes and abundances of K-feldspar megacrysts. Two different types of parental granites are recognized: a Regional Porphyritic Granite (RPG), distant from the Be-pegmatites, and an Adjacent Porphyritic Granite (APG) surrounding the Be-pegmatites. At the pegmatite margins, aplites (MA), or more rarely equigranular leucogranites, are in contact with the APG. The granite-to-pegmatite transition is characterized by a decreasing biotite/muscovite ratio and TiO2-Fe2O3t-MgO contents, which is consistent with fractional crystallization of biotite, and also by decreasing megacryst and grain size. A continuous magmatic crystallization trend from the RPG to the APG is observed, whereas the MA constitutes the earliest stage of pegmatite formation, characterized by depletion in ferromagnesian elements, calcium and some trace elements (Ba, Sr, Y, Nb, Ce, Zr, Th). However, the granite-pegmatite evolution occurred by differentiation from a common magma source.
Fil: Sardi, Fernando Guillermo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto Superior de Correlación Geológica. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Departamento de Geología. Cátedra Geología Estructural. Instituto Superior de Correlación Geológica; Argentina
Fil: Murata, Mamoru. Naruto University of Education; Japón
Fil: Grosse, Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto Superior de Correlación Geológica. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Departamento de Geología. Cátedra Geología Estructural. Instituto Superior de Correlación Geológica; Argentina
description The Carboniferous post-orogenic Huaco and Sanagasta granites are located in the central sector of the Velasco Range, northwestern Argentina, and host rare-element (Be) pegmatites. They are highly fractionated peraluminous granites with porphyritic textures having variable sizes and abundances of K-feldspar megacrysts. Two different types of parental granites are recognized: a Regional Porphyritic Granite (RPG), distant from the Be-pegmatites, and an Adjacent Porphyritic Granite (APG) surrounding the Be-pegmatites. At the pegmatite margins, aplites (MA), or more rarely equigranular leucogranites, are in contact with the APG. The granite-to-pegmatite transition is characterized by a decreasing biotite/muscovite ratio and TiO2-Fe2O3t-MgO contents, which is consistent with fractional crystallization of biotite, and also by decreasing megacryst and grain size. A continuous magmatic crystallization trend from the RPG to the APG is observed, whereas the MA constitutes the earliest stage of pegmatite formation, characterized by depletion in ferromagnesian elements, calcium and some trace elements (Ba, Sr, Y, Nb, Ce, Zr, Th). However, the granite-pegmatite evolution occurred by differentiation from a common magma source.
publishDate 2010
dc.date.none.fl_str_mv 2010-06
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/11336/88321
Sardi, Fernando Guillermo; Murata, Mamoru; Grosse, Pablo; Petrographical and geochemical features of the granite–pegmatite transition in the Velasco Pegmatitic District, NW Argentina; E Schweizerbartsche Verlags; Neues Jahrbuch für Geologie und Palaontologie - Abhandlungen; 258; 1; 6-2010; 61-71
0077-7749
CONICET Digital
CONICET
url http://hdl.handle.net/11336/88321
identifier_str_mv Sardi, Fernando Guillermo; Murata, Mamoru; Grosse, Pablo; Petrographical and geochemical features of the granite–pegmatite transition in the Velasco Pegmatitic District, NW Argentina; E Schweizerbartsche Verlags; Neues Jahrbuch für Geologie und Palaontologie - Abhandlungen; 258; 1; 6-2010; 61-71
0077-7749
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1127/0077-7749/2010/0085
info:eu-repo/semantics/altIdentifier/url/https://www.ingentaconnect.com/content/schweiz/njbgeol/2010/00000258/00000001/art00005%3bjsessionid=ha9riag2f6na6.x-ic-live-03
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
application/pdf
dc.publisher.none.fl_str_mv E Schweizerbartsche Verlags
publisher.none.fl_str_mv E Schweizerbartsche Verlags
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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score 13.069144

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