Linking the Wrangellia flood basalts to the Galápagos hotspot

Abstract The Triassic volcanic rocks of Wrangellia erupted at an equatorial to tropical latitude that was within 3000 km of western North America. The mafic and ultramafic volcanic rocks are compositionally and isotopically similar to those of oceanic plateaux that were generated from a Pacific mant...

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Autores principales:	J. Gregory Shellnutt, Jaroslav Dostal, Tung-Yi Lee
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/db4d5fe6114c4694a7bf71f4af3fc711
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spelling	oai:doaj.org-article:db4d5fe6114c4694a7bf71f4af3fc7112021-12-02T15:27:12ZLinking the Wrangellia flood basalts to the Galápagos hotspot10.1038/s41598-021-88098-72045-2322https://doaj.org/article/db4d5fe6114c4694a7bf71f4af3fc7112021-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-88098-7https://doaj.org/toc/2045-2322Abstract The Triassic volcanic rocks of Wrangellia erupted at an equatorial to tropical latitude that was within 3000 km of western North America. The mafic and ultramafic volcanic rocks are compositionally and isotopically similar to those of oceanic plateaux that were generated from a Pacific mantle plume-type source. The thermal conditions, estimated from the primitive rocks, indicate that it was a high temperature regime (TP > 1550 °C) consistent with elevated temperatures expected for a mantle plume. The only active hotspot currently located near the equator of the eastern Pacific Ocean that was active during the Mesozoic and produced ultramafic volcanic rocks is the Galápagos hotspot. The calculated mantle potential temperatures, trace elemental ratios, and Sr–Nd–Pb isotopes of the Wrangellia volcanic rocks are within the range of those from the Caribbean Plateau and Galápagos Islands, and collectively have similar internal variability as the Hawaii-Emperor island chain. The paleogeographic constraints, thermal estimates, and geochemistry suggests that it is possible that the Galápagos hotspot generated the volcanic rocks of Wrangellia and the Caribbean plateau or, more broadly, that the eastern Pacific (Panthalassa) Ocean was a unique region where anomalously high thermal conditions either periodically or continually existed from ~ 230 Ma to the present day.J. Gregory ShellnuttJaroslav DostalTung-Yi LeeNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-14 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q J. Gregory Shellnutt Jaroslav Dostal Tung-Yi Lee Linking the Wrangellia flood basalts to the Galápagos hotspot
description	Abstract The Triassic volcanic rocks of Wrangellia erupted at an equatorial to tropical latitude that was within 3000 km of western North America. The mafic and ultramafic volcanic rocks are compositionally and isotopically similar to those of oceanic plateaux that were generated from a Pacific mantle plume-type source. The thermal conditions, estimated from the primitive rocks, indicate that it was a high temperature regime (TP > 1550 °C) consistent with elevated temperatures expected for a mantle plume. The only active hotspot currently located near the equator of the eastern Pacific Ocean that was active during the Mesozoic and produced ultramafic volcanic rocks is the Galápagos hotspot. The calculated mantle potential temperatures, trace elemental ratios, and Sr–Nd–Pb isotopes of the Wrangellia volcanic rocks are within the range of those from the Caribbean Plateau and Galápagos Islands, and collectively have similar internal variability as the Hawaii-Emperor island chain. The paleogeographic constraints, thermal estimates, and geochemistry suggests that it is possible that the Galápagos hotspot generated the volcanic rocks of Wrangellia and the Caribbean plateau or, more broadly, that the eastern Pacific (Panthalassa) Ocean was a unique region where anomalously high thermal conditions either periodically or continually existed from ~ 230 Ma to the present day.
format	article
author	J. Gregory Shellnutt Jaroslav Dostal Tung-Yi Lee
author_facet	J. Gregory Shellnutt Jaroslav Dostal Tung-Yi Lee
author_sort	J. Gregory Shellnutt
title	Linking the Wrangellia flood basalts to the Galápagos hotspot
title_short	Linking the Wrangellia flood basalts to the Galápagos hotspot
title_full	Linking the Wrangellia flood basalts to the Galápagos hotspot
title_fullStr	Linking the Wrangellia flood basalts to the Galápagos hotspot
title_full_unstemmed	Linking the Wrangellia flood basalts to the Galápagos hotspot
title_sort	linking the wrangellia flood basalts to the galápagos hotspot
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/db4d5fe6114c4694a7bf71f4af3fc711
work_keys_str_mv	AT jgregoryshellnutt linkingthewrangelliafloodbasaltstothegalapagoshotspot AT jaroslavdostal linkingthewrangelliafloodbasaltstothegalapagoshotspot AT tungyilee linkingthewrangelliafloodbasaltstothegalapagoshotspot
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Linking the Wrangellia flood basalts to the Galápagos hotspot

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