Magmatic evolution of a Cordilleran flare-up and its role in the creation of silicic crust

Abstract The role of magmatic processes as a significant mechanism for the generation of voluminous silicic crust and the development of Cordilleran plateaus remains a lingering question in part because of the inherent difficulty in quantifying plutonic volumes. Despite this difficulty, a growing bo...

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Autores principales:	Kevin M. Ward, Jonathan R. Delph, George Zandt, Susan L. Beck, Mihai N. Ducea
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/9e013e9c915e47a2835e0d8aba5099d8
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spelling	oai:doaj.org-article:9e013e9c915e47a2835e0d8aba5099d82021-12-02T11:52:39ZMagmatic evolution of a Cordilleran flare-up and its role in the creation of silicic crust10.1038/s41598-017-09015-52045-2322https://doaj.org/article/9e013e9c915e47a2835e0d8aba5099d82017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-09015-5https://doaj.org/toc/2045-2322Abstract The role of magmatic processes as a significant mechanism for the generation of voluminous silicic crust and the development of Cordilleran plateaus remains a lingering question in part because of the inherent difficulty in quantifying plutonic volumes. Despite this difficulty, a growing body of independently measured plutonic-to-volcanic ratios suggests the volume of plutonic material in the crust related to Cordilleran magmatic systems is much larger than is previously expected. To better examine the role of crustal magmatic processes and its relationship to erupted material in Cordilleran systems, we present a continuous high-resolution crustal seismic velocity model for an ~800 km section of the active South American Cordillera (Puna Plateau). Although the plutonic-to-volcanic ratios we estimate vary along the length of the Puna Plateau, all ratios are larger than those previously reported (~30:1 compared to 5:1) implying that a significant volume of intermediate to silicic plutonic material is generated in the crust of the central South American Cordillera. Furthermore, as Cordilleran-type margins have been common since the onset of modern plate tectonics, our findings suggest that similar processes may have played a significant role in generating and/or modifying large volumes of continental crust, as observed in the continents today.Kevin M. WardJonathan R. DelphGeorge ZandtSusan L. BeckMihai N. DuceaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Kevin M. Ward Jonathan R. Delph George Zandt Susan L. Beck Mihai N. Ducea Magmatic evolution of a Cordilleran flare-up and its role in the creation of silicic crust
description	Abstract The role of magmatic processes as a significant mechanism for the generation of voluminous silicic crust and the development of Cordilleran plateaus remains a lingering question in part because of the inherent difficulty in quantifying plutonic volumes. Despite this difficulty, a growing body of independently measured plutonic-to-volcanic ratios suggests the volume of plutonic material in the crust related to Cordilleran magmatic systems is much larger than is previously expected. To better examine the role of crustal magmatic processes and its relationship to erupted material in Cordilleran systems, we present a continuous high-resolution crustal seismic velocity model for an ~800 km section of the active South American Cordillera (Puna Plateau). Although the plutonic-to-volcanic ratios we estimate vary along the length of the Puna Plateau, all ratios are larger than those previously reported (~30:1 compared to 5:1) implying that a significant volume of intermediate to silicic plutonic material is generated in the crust of the central South American Cordillera. Furthermore, as Cordilleran-type margins have been common since the onset of modern plate tectonics, our findings suggest that similar processes may have played a significant role in generating and/or modifying large volumes of continental crust, as observed in the continents today.
format	article
author	Kevin M. Ward Jonathan R. Delph George Zandt Susan L. Beck Mihai N. Ducea
author_facet	Kevin M. Ward Jonathan R. Delph George Zandt Susan L. Beck Mihai N. Ducea
author_sort	Kevin M. Ward
title	Magmatic evolution of a Cordilleran flare-up and its role in the creation of silicic crust
title_short	Magmatic evolution of a Cordilleran flare-up and its role in the creation of silicic crust
title_full	Magmatic evolution of a Cordilleran flare-up and its role in the creation of silicic crust
title_fullStr	Magmatic evolution of a Cordilleran flare-up and its role in the creation of silicic crust
title_full_unstemmed	Magmatic evolution of a Cordilleran flare-up and its role in the creation of silicic crust
title_sort	magmatic evolution of a cordilleran flare-up and its role in the creation of silicic crust
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/9e013e9c915e47a2835e0d8aba5099d8
work_keys_str_mv	AT kevinmward magmaticevolutionofacordilleranflareupanditsroleinthecreationofsiliciccrust AT jonathanrdelph magmaticevolutionofacordilleranflareupanditsroleinthecreationofsiliciccrust AT georgezandt magmaticevolutionofacordilleranflareupanditsroleinthecreationofsiliciccrust AT susanlbeck magmaticevolutionofacordilleranflareupanditsroleinthecreationofsiliciccrust AT mihainducea magmaticevolutionofacordilleranflareupanditsroleinthecreationofsiliciccrust
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Magmatic evolution of a Cordilleran flare-up and its role in the creation of silicic crust

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