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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todo:paper_08959811_v90_n_p338_Pallares2023-10-03T15:43:43Z 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 Pallares, C. Quidelleur, X. Debreil, J.A. Antoine, C. Sarda, P. Tchilinguirian, P. Delpech, G. Gillot, P.-Y. 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 JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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 Pallares, C. Quidelleur, X. Debreil, J.A. Antoine, C. Sarda, P. Tchilinguirian, P. Delpech, G. Gillot, P.-Y. 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 |
| format |
JOUR |
| author |
Pallares, C. Quidelleur, X. Debreil, J.A. Antoine, C. Sarda, P. Tchilinguirian, P. Delpech, G. Gillot, P.-Y. |
| author_facet |
Pallares, C. Quidelleur, X. Debreil, J.A. Antoine, C. Sarda, P. Tchilinguirian, P. Delpech, G. Gillot, P.-Y. |
| author_sort |
Pallares, C. |
| 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 |
| url |
http://hdl.handle.net/20.500.12110/paper_08959811_v90_n_p338_Pallares |
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