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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crspringernat:10.1038/s41598-021-88098-7 2023-05-15T16:05:58+02:00 Linking the Wrangellia flood basalts to the Galápagos hotspot Shellnutt, J. Gregory Dostal, Jaroslav Lee, Tung-Yi Ministry of Science and Technology, Taiwan 2021 http://dx.doi.org/10.1038/s41598-021-88098-7 http://www.nature.com/articles/s41598-021-88098-7.pdf http://www.nature.com/articles/s41598-021-88098-7 en eng Springer Science and Business Media LLC https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 CC-BY Scientific Reports volume 11, issue 1 ISSN 2045-2322 Multidisciplinary journal-article 2021 crspringernat https://doi.org/10.1038/s41598-021-88098-7 2022-01-04T12:41:26Z 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 (T P > 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. Article in Journal/Newspaper Emperor Island Springer Nature (via Crossref) Emperor Island ENVELOPE(-68.710,-68.710,-67.865,-67.865) Pacific Scientific Reports 11 1 |
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Open Polar |
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Springer Nature (via Crossref) |
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crspringernat |
language |
English |
topic |
Multidisciplinary |
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Multidisciplinary Shellnutt, J. Gregory Dostal, Jaroslav Lee, Tung-Yi Linking the Wrangellia flood basalts to the Galápagos hotspot |
topic_facet |
Multidisciplinary |
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 (T P > 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. |
author2 |
Ministry of Science and Technology, Taiwan |
format |
Article in Journal/Newspaper |
author |
Shellnutt, J. Gregory Dostal, Jaroslav Lee, Tung-Yi |
author_facet |
Shellnutt, J. Gregory Dostal, Jaroslav Lee, Tung-Yi |
author_sort |
Shellnutt, J. Gregory |
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 |
Springer Science and Business Media LLC |
publishDate |
2021 |
url |
http://dx.doi.org/10.1038/s41598-021-88098-7 http://www.nature.com/articles/s41598-021-88098-7.pdf http://www.nature.com/articles/s41598-021-88098-7 |
long_lat |
ENVELOPE(-68.710,-68.710,-67.865,-67.865) |
geographic |
Emperor Island Pacific |
geographic_facet |
Emperor Island Pacific |
genre |
Emperor Island |
genre_facet |
Emperor Island |
op_source |
Scientific Reports volume 11, issue 1 ISSN 2045-2322 |
op_rights |
https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41598-021-88098-7 |
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Scientific Reports |
container_volume |
11 |
container_issue |
1 |
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1766401885668900864 |