The generation of continental flood basalts by decompression melting of internally heated mantle

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

Modeled primary magma compositions for flood basalts from the Central Atlantic magmatic province and the Ferrar large igneous province (Antarctica) require mantle potential temperatures (TP) of 1450 ± 50 °C, with melting taking place over a pressure range of ~2.0 GPa to <0.5 GPa. This range of TP is consistent with internal warming of mantle insulated by continental lithosphere, and does not necessarily require a mantle plume. The substantial crustal attenuation needed to allow decompression melting was facilitated by plate boundary forces that accompanied continental breakup. However, continental fragmentation and the plate boundary forces necessary to drive low-TP riftrelated magmatism may still require the action of hot mantle plumes.
Original languageEnglish
Article numberG36442
Pages (from-to)311-314
Number of pages4
JournalGeology
Volume43
Issue number4
Early online date27 Feb 2015
DOIs
Publication statusPublished - Apr 2015

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flood basalt
mantle plume
decompression
plate boundary
melting
mantle
continental breakup
large igneous province
continental lithosphere
potential temperature
magmatism
fragmentation
warming
magma
temperature
province
Antarctica

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)

Cite this

The generation of continental flood basalts by decompression melting of internally heated mantle. / Hole, Malcolm J.

In: Geology, Vol. 43, No. 4, G36442, 04.2015, p. 311-314.

Research output: Contribution to journalArticle

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