Quaternary evolution of the El Tromen volcanic system, Argentina, based on new K-Ar and geochemical data: Insights for temporal evolution of magmatic processes between arc and back-arc settings

The new data coupled with those previously published highlight that, in the last 2 Ma, the Tromen Volcanic System (TVS) erupted transitional, alkali and rhyolitic lavas which built the Tilhué, Chapúa-Maipo-El Puente, Coyocho-Wayle and El Tromen volcanic groups. Four partial melting events have been...

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Guardado en:
Detalles Bibliográficos
Publicado: 2019
Materias:
Argentina
Back-arc context
El Tromen volcanic system
K-Ar ages
Major and trace elements
Ni contents
Southern volcanic zone
backarc basin
geochemistry
lava
magmatic differentiation
nickel
partial melting
potassium-argon dating
Quaternary
temporal evolution
trace element
volcanic eruption
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08959811_v90_n_p338_Pallares
http://hdl.handle.net/20.500.12110/paper_08959811_v90_n_p338_Pallares
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_08959811_v90_n_p338_Pallares
record_format dspace
spelling paper:paper_08959811_v90_n_p338_Pallares2023-06-08T15:49:10Z Quaternary evolution of the El Tromen volcanic system, Argentina, based on new K-Ar and geochemical data: Insights for temporal evolution of magmatic processes between arc and back-arc settings Argentina Back-arc context El Tromen volcanic system K-Ar ages Major and trace elements Ni contents Southern volcanic zone backarc basin geochemistry lava magmatic differentiation nickel partial melting potassium-argon dating Quaternary temporal evolution trace element volcanic eruption Argentina The new data coupled with those previously published highlight that, in the last 2 Ma, the Tromen Volcanic System (TVS) erupted transitional, alkali and rhyolitic lavas which built the Tilhué, Chapúa-Maipo-El Puente, Coyocho-Wayle and El Tromen volcanic groups. Four partial melting events have been identified: first at 2.10 ± 0.13 Ma, second at 1.44 ± 0.08 Ma, third at 1.04 ± 0.06 Ma and the last at 0.488 ± 0.007 Ma. Partial melting rates of the TVS sources are about 7% and constant, where first events affected simultaneously a shallower spinel-bearing mantle and a lower continental crust, and later ones a deeper garnet-bearing mantle. The melting of shallower, spinel-bearing, mantle released melts with low and middle-Ni, while the melting of deeper, garnet-bearing mantle, released relatively high-Ni melts. The lower continental crust affected by the first partial melting event could have been of sedimentary origin, thus producing the peraluminous Tilhué evolved lavas. © 2018 Elsevier Ltd 2019 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08959811_v90_n_p338_Pallares http://hdl.handle.net/20.500.12110/paper_08959811_v90_n_p338_Pallares
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Argentina
Back-arc context
El Tromen volcanic system
K-Ar ages
Major and trace elements
Ni contents
Southern volcanic zone
backarc basin
geochemistry
lava
magmatic differentiation
nickel
partial melting
potassium-argon dating
Quaternary
temporal evolution
trace element
volcanic eruption
Argentina
spellingShingle Argentina
Back-arc context
El Tromen volcanic system
K-Ar ages
Major and trace elements
Ni contents
Southern volcanic zone
backarc basin
geochemistry
lava
magmatic differentiation
nickel
partial melting
potassium-argon dating
Quaternary
temporal evolution
trace element
volcanic eruption
Argentina
Quaternary evolution of the El Tromen volcanic system, Argentina, based on new K-Ar and geochemical data: Insights for temporal evolution of magmatic processes between arc and back-arc settings
topic_facet Argentina
Back-arc context
El Tromen volcanic system
K-Ar ages
Major and trace elements
Ni contents
Southern volcanic zone
backarc basin
geochemistry
lava
magmatic differentiation
nickel
partial melting
potassium-argon dating
Quaternary
temporal evolution
trace element
volcanic eruption
Argentina
description The new data coupled with those previously published highlight that, in the last 2 Ma, the Tromen Volcanic System (TVS) erupted transitional, alkali and rhyolitic lavas which built the Tilhué, Chapúa-Maipo-El Puente, Coyocho-Wayle and El Tromen volcanic groups. Four partial melting events have been identified: first at 2.10 ± 0.13 Ma, second at 1.44 ± 0.08 Ma, third at 1.04 ± 0.06 Ma and the last at 0.488 ± 0.007 Ma. Partial melting rates of the TVS sources are about 7% and constant, where first events affected simultaneously a shallower spinel-bearing mantle and a lower continental crust, and later ones a deeper garnet-bearing mantle. The melting of shallower, spinel-bearing, mantle released melts with low and middle-Ni, while the melting of deeper, garnet-bearing mantle, released relatively high-Ni melts. The lower continental crust affected by the first partial melting event could have been of sedimentary origin, thus producing the peraluminous Tilhué evolved lavas. © 2018 Elsevier Ltd
title Quaternary evolution of the El Tromen volcanic system, Argentina, based on new K-Ar and geochemical data: Insights for temporal evolution of magmatic processes between arc and back-arc settings
title_short Quaternary evolution of the El Tromen volcanic system, Argentina, based on new K-Ar and geochemical data: Insights for temporal evolution of magmatic processes between arc and back-arc settings
title_full Quaternary evolution of the El Tromen volcanic system, Argentina, based on new K-Ar and geochemical data: Insights for temporal evolution of magmatic processes between arc and back-arc settings
title_fullStr Quaternary evolution of the El Tromen volcanic system, Argentina, based on new K-Ar and geochemical data: Insights for temporal evolution of magmatic processes between arc and back-arc settings
title_full_unstemmed Quaternary evolution of the El Tromen volcanic system, Argentina, based on new K-Ar and geochemical data: Insights for temporal evolution of magmatic processes between arc and back-arc settings
title_sort quaternary evolution of the el tromen volcanic system, argentina, based on new k-ar and geochemical data: insights for temporal evolution of magmatic processes between arc and back-arc settings
publishDate 2019
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08959811_v90_n_p338_Pallares
http://hdl.handle.net/20.500.12110/paper_08959811_v90_n_p338_Pallares
_version_ 1768545424891707392

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