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LIP formation and protracted lower mantle upwelling induced by rifting and delamination

Petersen, Kenni Dinesen; Schiffer, Christian; Nagel, Thorsten

LIP formation and protracted lower mantle upwelling induced by rifting and delamination Thumbnail


Authors

Kenni Dinesen Petersen

Christian Schiffer

Thorsten Nagel



Abstract

Large Igneous Provinces (LIPs) are commonly attributed to mantle plumes, hot upwellings from the deep lower mantle, apparently unrelated to plate motions. However, LIPs often form in association with rifting and breakup. Using numerical modelling, we introduce a novel idea that explains plume-like mantle upwelling by plate tectonic processes. Our model indicates that rifting-induced delamination of orogenic lithosphere can perturb the thermochemical mantle stratification and induce lower mantle upwelling which causes syn-rift LIP formation followed by protracted and enhanced mid ocean ridge basalt (MORB) generation. Our model provides an explanation for the geographical correlation between the Caledonian suture, the North Atlantic Igneous Province (NAIP) and present-day Icelandic magmatism.

Citation

Petersen, K. D., Schiffer, C., & Nagel, T. (2018). LIP formation and protracted lower mantle upwelling induced by rifting and delamination. Scientific Reports, 8(1), Article 16578. https://doi.org/10.1038/s41598-018-34194-0

Journal Article Type Article
Acceptance Date Oct 12, 2018
Online Publication Date Nov 8, 2018
Publication Date Nov 8, 2018
Deposit Date Nov 22, 2018
Publicly Available Date Nov 22, 2018
Journal Scientific Reports
Publisher Nature Research
Peer Reviewed Peer Reviewed
Volume 8
Issue 1
Article Number 16578
DOI https://doi.org/10.1038/s41598-018-34194-0

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Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/

Copyright Statement
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.




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