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

Citation

Jiang, Q and Jourdan, F and Olierook, HKH and Merle, RE and Whittaker, JM, Longest continuously erupting large igneous province driven by plume-ridge interaction, Geology, 49, (2) pp. 206-210. ISSN 0091-7613 (2020) [Refereed Article]

Copyright Statement

Copyright 2020 Geological Society of America

DOI: doi:10.1130/G47850.1

Abstract

Large igneous provinces (LIPs) typically form in one short pulse of ~1–5 Ma or several punctuated ~1–5 Ma pulses. Here, our 25 new 40Ar/39Ar plateau ages for the main construct of 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 lifespan of >32 Ma. This suggests that the Kerguelen LIP records the longest, continuous high-magma-flux emplacement interval of any LIP. Distinct from both short-lived and multiple-pulsed LIPs, we propose that Kerguelen is a different type of LIP that formed through long-term interactions between a mantle plume and mid-ocean ridge, which is enabled by multiple ridge jumps, slow spreading, and migration of the ridge. Such processes allow the transport of magma products away from the eruption center and result in long-lived, continuous magmatic activity.

Item Details

Item Type:Refereed Article
Keywords:Kerguelen, seafloor spreading, plumes
Research Division:Earth Sciences
Research Group:Geology
Research Field:Geochronology
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the earth sciences
UTAS Author:Whittaker, JM (Associate Professor Jo Whittaker)
ID Code:141620
Year Published:2020
Funding Support:Australian Research Council (DP180102280)
Web of Science® Times Cited:3
Deposited By:Oceans and Cryosphere
Deposited On:2020-11-03
Last Modified:2021-03-22
Downloads:1 View Download Statistics

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