Petrologic and geochemical constraints on the origin of Astaneh pluton, Zagros orogenic belt, Iran

The Astaneh plutonic complex consists of a series of granitoid rocks ranging in composition from quartzdiorites to monzogranites and evolving from metaluminous to weakly peraluminous compositions. They belong to the high-K calc-alkaline series, having features of typical Andean-type cordilleran gran...

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Autores: Tahmasbi, Zahra, Castro Dorado, Antonio, Khalili, Mahmud, Khalaji, A. Ahmadi, Rosa Díaz, Jesús de la
Tipo de recurso: artículo
Fecha de publicación:2010
País:España
Institución:Universidad de Huelva (UHU)
Repositorio:Arias Montano. Repositorio Institucional de la Universidad de Huelva
Idioma:inglés
OAI Identifier:oai:ariasmontano.uhu.es:10272/5664
Acceso en línea:http://hdl.handle.net/10272/5664
Access Level:acceso abierto
Palabra clave:Iran
Zagros
Sanandaj–Sirjan
Geología
Granodiorite
Enclaves
Neo-tethys
Petrología
Granito
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spelling Petrologic and geochemical constraints on the origin of Astaneh pluton, Zagros orogenic belt, IranTahmasbi, ZahraCastro Dorado, AntonioKhalili, MahmudKhalaji, A. AhmadiRosa Díaz, Jesús de laIranZagrosSanandaj–SirjanGeologíaGranodioriteEnclavesNeo-tethysPetrologíaGranitoThe Astaneh plutonic complex consists of a series of granitoid rocks ranging in composition from quartzdiorites to monzogranites and evolving from metaluminous to weakly peraluminous compositions. They belong to the high-K calc-alkaline series, having features of typical Andean-type cordilleran granitoids. Trace and rare-earth elements distribution patterns for the Astaneh rocks indicate a distinctive depletion in Nb, Sr, Ba, P and Ti relative to other trace elements and a greater enrichment in LILE compared to HFSE. These geochemical characteristics suggest the participation of an important recycled (sedimentary?) component in the source region of the granitoids. They have Sr initial isotopic ratios in the range 0.7078–0.7084 and negative eNd values of 5.39 to 6.13 for a time of generation of 170 Ma. There is a genetic link between quartz-diorites and granodiorites, the dominant rock types of the Astabeh intrusion. Direct melting or fractionation from a diorite source is very unlike. It is proposed that the Astaneh parental Qtd-diorite magmas were produced by the partial melting of a mixed source, dominantly composed of amphibolites and sediments, that was formed during subduction of Neo-Tethyan oceanic crust below the Iranian microcontinent during Middle Jurassic times.Elsevier20102010-01-0120102010-01-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10272/5664reponame:Arias Montano. Repositorio Institucional de la Universidad de Huelvainstname:Universidad de Huelva (UHU)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Atribución-NoComercial-SinDerivadas 3.0 Españahttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:ariasmontano.uhu.es:10272/56642026-06-02T14:58:11Z
dc.title.none.fl_str_mv Petrologic and geochemical constraints on the origin of Astaneh pluton, Zagros orogenic belt, Iran
title Petrologic and geochemical constraints on the origin of Astaneh pluton, Zagros orogenic belt, Iran
spellingShingle Petrologic and geochemical constraints on the origin of Astaneh pluton, Zagros orogenic belt, Iran
Tahmasbi, Zahra
Iran
Zagros
Sanandaj–Sirjan
Geología
Granodiorite
Enclaves
Neo-tethys
Petrología
Granito
title_short Petrologic and geochemical constraints on the origin of Astaneh pluton, Zagros orogenic belt, Iran
title_full Petrologic and geochemical constraints on the origin of Astaneh pluton, Zagros orogenic belt, Iran
title_fullStr Petrologic and geochemical constraints on the origin of Astaneh pluton, Zagros orogenic belt, Iran
title_full_unstemmed Petrologic and geochemical constraints on the origin of Astaneh pluton, Zagros orogenic belt, Iran
title_sort Petrologic and geochemical constraints on the origin of Astaneh pluton, Zagros orogenic belt, Iran
dc.creator.none.fl_str_mv Tahmasbi, Zahra
Castro Dorado, Antonio
Khalili, Mahmud
Khalaji, A. Ahmadi
Rosa Díaz, Jesús de la
author Tahmasbi, Zahra
author_facet Tahmasbi, Zahra
Castro Dorado, Antonio
Khalili, Mahmud
Khalaji, A. Ahmadi
Rosa Díaz, Jesús de la
author_role author
author2 Castro Dorado, Antonio
Khalili, Mahmud
Khalaji, A. Ahmadi
Rosa Díaz, Jesús de la
author2_role author
author
author
author
dc.contributor.none.fl_str_mv
dc.subject.none.fl_str_mv Iran
Zagros
Sanandaj–Sirjan
Geología
Granodiorite
Enclaves
Neo-tethys
Petrología
Granito
topic Iran
Zagros
Sanandaj–Sirjan
Geología
Granodiorite
Enclaves
Neo-tethys
Petrología
Granito
description The Astaneh plutonic complex consists of a series of granitoid rocks ranging in composition from quartzdiorites to monzogranites and evolving from metaluminous to weakly peraluminous compositions. They belong to the high-K calc-alkaline series, having features of typical Andean-type cordilleran granitoids. Trace and rare-earth elements distribution patterns for the Astaneh rocks indicate a distinctive depletion in Nb, Sr, Ba, P and Ti relative to other trace elements and a greater enrichment in LILE compared to HFSE. These geochemical characteristics suggest the participation of an important recycled (sedimentary?) component in the source region of the granitoids. They have Sr initial isotopic ratios in the range 0.7078–0.7084 and negative eNd values of 5.39 to 6.13 for a time of generation of 170 Ma. There is a genetic link between quartz-diorites and granodiorites, the dominant rock types of the Astabeh intrusion. Direct melting or fractionation from a diorite source is very unlike. It is proposed that the Astaneh parental Qtd-diorite magmas were produced by the partial melting of a mixed source, dominantly composed of amphibolites and sediments, that was formed during subduction of Neo-Tethyan oceanic crust below the Iranian microcontinent during Middle Jurassic times.
publishDate 2010
dc.date.none.fl_str_mv 2010
2010-01-01
2010
2010-01-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10272/5664
url http://hdl.handle.net/10272/5664
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Atribución-NoComercial-SinDerivadas 3.0 España
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Atribución-NoComercial-SinDerivadas 3.0 España
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Arias Montano. Repositorio Institucional de la Universidad de Huelva
instname:Universidad de Huelva (UHU)
instname_str Universidad de Huelva (UHU)
reponame_str Arias Montano. Repositorio Institucional de la Universidad de Huelva
collection Arias Montano. Repositorio Institucional de la Universidad de Huelva
repository.name.fl_str_mv
repository.mail.fl_str_mv
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