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Longest continuously erupting large igneous province driven by plume-ridge interaction

Jiang, Q, Jourdan, F, Olierook, HKH, Merle, RE and Whittaker, JM ORCID: 0000-0002-3170-3935 2020 , 'Longest continuously erupting large igneous province driven by plume-ridge interaction' , Geology , pp. 1-5 , doi: 10.1130/G47850.1.

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Abstract

Large igneous provinces (LIPs) typically form in one short pulse of ~1–5 Ma or severalpunctuated ~1–5 Ma pulses. Here, our 25 new 40Ar/39Ar plateau ages for the main constructof the Kerguelen LIP—the Cretaceous Southern and Central Kerguelen Plateau, Elan Bank,and Broken Ridge—show continuous volcanic activity from ca. 122 to 90 Ma, a long lifespanof >32 Ma. This suggests that the Kerguelen LIP records the longest, continuous high-magma-fluxemplacement interval of any LIP. Distinct from both short-lived and multiple-pulsedLIPs, we propose that Kerguelen is a different type of LIP that formed through long-terminteractions between a mantle plume and mid-ocean ridge, which is enabled by multipleridge jumps, slow spreading, and migration of the ridge. Such processes allow the transportof magma products away from the eruption center and result in long-lived, continuousmagmatic activity.

Item Type: Article
Authors/Creators:Jiang, Q and Jourdan, F and Olierook, HKH and Merle, RE and Whittaker, JM
Keywords: Kerguelen, seafloor spreading, plumes
Journal or Publication Title: Geology
Publisher: Geological Soc America
ISSN: 0091-7613
DOI / ID Number: 10.1130/G47850.1
Copyright Information:

Copyright 2020 Geological Society of America

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