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Large Igneous Provinces

Citation

Coffin, MF and Eldholm, O, Large Igneous Provinces, Encyclopedia of Ocean Sciences (Reference Module in Earth Systems and Environmental Sciences), Elsevier Ltd., JK Cochran, H J Bokuniewicz, PL Yager (ed), United Kingdom, pp. 337-345. ISBN 9780128130827 (2019) [Revised Book Chapter]


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DOI: doi:10.1016/B978-0-12-409548-9.11329-6

Abstract

Large igneous provinces (LIPs) are massive crustal emplacements of predominantly Fe- and Mg-rich (mafic) rock that form by processes other than normal seafloor spreading. LIP rocks are readily distinguishable from the products of the two other major types of magmatism, mid-ocean ridge and arc, on the Earth's surface on the basis of petrologic, geochemical, geochronologic, geophysical, and physical volcanological data. LIPs occur on both the continents and oceans, and include continental flood basalts, volcanic passive margins, oceanic plateaus, submarine ridges, seamounts, and ocean basin flood basalts. LIPs and hot spots are commonly attributed to decompression melting of hot, low density mantle material known as mantle plumes. This type of magmatism currently represents ∼ 10% of the mass and energy flux from the Earth's deep interior to its crust. The flux may have been higher in the past, but is episodic over geological time, in contrast to the relatively steady-state activity at seafloor spreading centers. Such episodicity reveals dynamic, non-steady-state circulation within the Earth's mantle, and suggests a strong potential for LIP emplacements to contribute to, if not instigate, major environmental changes.

Item Details

Item Type:Revised Book Chapter
Keywords:large igneous provinces, International Ocean Discovery Program
Research Division:Earth Sciences
Research Group:Geology
Research Field:Marine Geoscience
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Earth Sciences
UTAS Author:Coffin, MF (Professor Mike Coffin)
ID Code:131634
Year Published:2019
Funding Support:Australian Research Council (LE160100067)
Deposited By:Oceans and Cryosphere
Deposited On:2019-03-28
Last Modified:2019-03-28
Downloads:0

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