Gondwanan magmatism with adakite-like signature linked to Cu (Mo)-porphyry deposits from the San Rafael Massif, Mendoza Province, Argentina

The gondwanan magmatism in the San Rafael Massif, known as Choiyoi Magmatic Cycle, was emplaced during the inception of a magmatic arc setting during the early Permian. Two different sections can be differentiated in this volcanic sequence. The lower section (~281 up to ~265 Ma) consisting of andesi...

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Autores principales: Gómez, A.L.R., Rubinstein, N.A., Valencia, V.A.
Formato: JOUR
Materias:
Adakite-like signature
Argentina
Cu-porphyry
Gondwanan magmatism
San Rafael Massif
adakite
copper
Gondwana
magmatism
ore deposit
petrogenesis
porphyry
subduction zone
Mendoza
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00092819_v75_n1_p89_Gomez
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00092819_v75_n1_p89_Gomez
record_format dspace
spelling todo:paper_00092819_v75_n1_p89_Gomez2023-10-03T14:08:36Z Gondwanan magmatism with adakite-like signature linked to Cu (Mo)-porphyry deposits from the San Rafael Massif, Mendoza Province, Argentina Gómez, A.L.R. Rubinstein, N.A. Valencia, V.A. Adakite-like signature Argentina Cu-porphyry Gondwanan magmatism San Rafael Massif adakite copper Gondwana magmatism ore deposit petrogenesis porphyry subduction zone Argentina Mendoza San Rafael Massif The gondwanan magmatism in the San Rafael Massif, known as Choiyoi Magmatic Cycle, was emplaced during the inception of a magmatic arc setting during the early Permian. Two different sections can be differentiated in this volcanic sequence. The lower section (~281 up to ~265 Ma) consisting of andesites and dacitic to low-silica rhyolitic ignimbrites has geochemical characteristics that indicate a subduction zone setting. The upper section (~265 up to ~252 Ma) composed of rhyolitic ignimbrites and lava flows, dacitic to rhyolitic subvolcanics and alkalic basaltic andesites has geochemical characteristics transitional between subduction and continental intraplate settings. Several Cu-(Mo) porphyry deposits are genetically linked to the lower section (Infiernillo, San Pedro and La Chilca-Zanjón del Buitre). In this paper, we discussed the petrogenesis of the magmatism linked to the porphyry deposits from the San Rafael Massif. The petrogenetic analysis suggests that the lower section was produced in a thickened crust resulting in an adakite-like signature magmatism. The U/Pb LA-ICP-MS age of magmatic zircons from an intrusive associated to the San Pedro porphyry (263.1 ± 4.2 Ma) allowed confirming that the emplacement of Cu-Mo porphyry deposits in the San Rafael Massif occurred during the change in the geodynamical conditions from a transpressive to a transtensive tectonic regime. © 2014 Elsevier GmbH. Fil:Gómez, A.L.R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Rubinstein, N.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00092819_v75_n1_p89_Gomez
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Adakite-like signature
Argentina
Cu-porphyry
Gondwanan magmatism
San Rafael Massif
adakite
copper
Gondwana
magmatism
ore deposit
petrogenesis
porphyry
subduction zone
Argentina
Mendoza
San Rafael Massif
spellingShingle Adakite-like signature
Argentina
Cu-porphyry
Gondwanan magmatism
San Rafael Massif
adakite
copper
Gondwana
magmatism
ore deposit
petrogenesis
porphyry
subduction zone
Argentina
Mendoza
San Rafael Massif
Gómez, A.L.R.
Rubinstein, N.A.
Valencia, V.A.
Gondwanan magmatism with adakite-like signature linked to Cu (Mo)-porphyry deposits from the San Rafael Massif, Mendoza Province, Argentina
topic_facet Adakite-like signature
Argentina
Cu-porphyry
Gondwanan magmatism
San Rafael Massif
adakite
copper
Gondwana
magmatism
ore deposit
petrogenesis
porphyry
subduction zone
Argentina
Mendoza
San Rafael Massif
description The gondwanan magmatism in the San Rafael Massif, known as Choiyoi Magmatic Cycle, was emplaced during the inception of a magmatic arc setting during the early Permian. Two different sections can be differentiated in this volcanic sequence. The lower section (~281 up to ~265 Ma) consisting of andesites and dacitic to low-silica rhyolitic ignimbrites has geochemical characteristics that indicate a subduction zone setting. The upper section (~265 up to ~252 Ma) composed of rhyolitic ignimbrites and lava flows, dacitic to rhyolitic subvolcanics and alkalic basaltic andesites has geochemical characteristics transitional between subduction and continental intraplate settings. Several Cu-(Mo) porphyry deposits are genetically linked to the lower section (Infiernillo, San Pedro and La Chilca-Zanjón del Buitre). In this paper, we discussed the petrogenesis of the magmatism linked to the porphyry deposits from the San Rafael Massif. The petrogenetic analysis suggests that the lower section was produced in a thickened crust resulting in an adakite-like signature magmatism. The U/Pb LA-ICP-MS age of magmatic zircons from an intrusive associated to the San Pedro porphyry (263.1 ± 4.2 Ma) allowed confirming that the emplacement of Cu-Mo porphyry deposits in the San Rafael Massif occurred during the change in the geodynamical conditions from a transpressive to a transtensive tectonic regime. © 2014 Elsevier GmbH.
format JOUR
author Gómez, A.L.R.
Rubinstein, N.A.
Valencia, V.A.
author_facet Gómez, A.L.R.
Rubinstein, N.A.
Valencia, V.A.
author_sort Gómez, A.L.R.
title Gondwanan magmatism with adakite-like signature linked to Cu (Mo)-porphyry deposits from the San Rafael Massif, Mendoza Province, Argentina
title_short Gondwanan magmatism with adakite-like signature linked to Cu (Mo)-porphyry deposits from the San Rafael Massif, Mendoza Province, Argentina
title_full Gondwanan magmatism with adakite-like signature linked to Cu (Mo)-porphyry deposits from the San Rafael Massif, Mendoza Province, Argentina
title_fullStr Gondwanan magmatism with adakite-like signature linked to Cu (Mo)-porphyry deposits from the San Rafael Massif, Mendoza Province, Argentina
title_full_unstemmed Gondwanan magmatism with adakite-like signature linked to Cu (Mo)-porphyry deposits from the San Rafael Massif, Mendoza Province, Argentina
title_sort gondwanan magmatism with adakite-like signature linked to cu (mo)-porphyry deposits from the san rafael massif, mendoza province, argentina
url http://hdl.handle.net/20.500.12110/paper_00092819_v75_n1_p89_Gomez
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AT rubinsteinna gondwananmagmatismwithadakitelikesignaturelinkedtocumoporphyrydepositsfromthesanrafaelmassifmendozaprovinceargentina
AT valenciava gondwananmagmatismwithadakitelikesignaturelinkedtocumoporphyrydepositsfromthesanrafaelmassifmendozaprovinceargentina
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