Thick crust, hydrous magmas, and the paradox of voluminous cold magmatism

dc.citation.firstpage227en_US
dc.citation.issueNumber2en_US
dc.citation.journalTitleVolcanicaen_US
dc.citation.lastpage238en_US
dc.citation.volumeNumber4en_US
dc.contributor.authorLee, Cin-Tyen_US
dc.contributor.authorLiu, Bodaen_US
dc.date.accessioned2022-01-07T16:17:20Zen_US
dc.date.available2022-01-07T16:17:20Zen_US
dc.date.issued2021en_US
dc.description.abstractAndesites are refined and “cold” magmas compared to their basaltic parents, yet large volumes of andesites are generated at continental arcs. We show that large andesitic plutons are favored when arc crust attains a thickness of ~60 km while mafic plutons are small and favored when arc crust is thin. Using simple thermal models, we show that large, long-lived and relatively cold partially molten zones, sustained by recharge of hydrous basaltic magmas, are favored at depth when arc crust is thick due to the reduced efficiency of heat loss with increasing crustal thickness. Thin crust and drier magmas favor hotter and thinner partially molten zones. Our study provides an explanation for the apparent paradox that the most voluminous magmas in continental arc settings are cold. The origin of andesites may be linked to the interplay between magmatic differentiation, the availability of water, and the processes that control crustal thickness.en_US
dc.identifier.citationLee, Cin-Ty and Liu, Boda. "Thick crust, hydrous magmas, and the paradox of voluminous cold magmatism." <i>Volcanica,</i> 4, no. 2 (2021) Presses universitaires de Strasbourg: 227-238. https://doi.org/10.30909/vol.04.02.227238.en_US
dc.identifier.digitalVolcanicaen_US
dc.identifier.doihttps://doi.org/10.30909/vol.04.02.227238en_US
dc.identifier.urihttps://hdl.handle.net/1911/111913en_US
dc.language.isoengen_US
dc.publisherPresses universitaires de Strasbourgen_US
dc.rightsThis work is licensed under a Creative Commons Attribution 4.0 International License.en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_US
dc.titleThick crust, hydrous magmas, and the paradox of voluminous cold magmatismen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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