Thermal impact of magmatism in subduction zones

David W. Rees Jones*, Richard F. Katz, Meng Tian, John F. Rudge

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)
5 Downloads (Pure)

Abstract

Magmatism in subduction zones builds continental crust and causes most of Earth's subaerial volcanism. The production rate and composition of magmas are controlled by the thermal structure of subduction zones. A range of geochemical and heat flow evidence has recently converged to indicate that subduction zones are hotter at lithospheric depths beneath the arc than predicted by canonical thermomechanical models, which neglect magmatism. We show that this discrepancy can be resolved by consideration of the heat transported by magma. In our one- and two-dimensional numerical models and scaling analysis, magmatic transport of sensible and latent heat locally alters the thermal structure of canonical models by ∼300 K, increasing predicted surface heat flow and mid-lithospheric temperatures to observed values. We find the advection of sensible heat to be larger than the deposition of latent heat. Based on these results we conclude that thermal transport by magma migration affects the chemistry and the location of arc volcanoes.
Original languageEnglish
Pages (from-to)73-79
Number of pages7
JournalEarth and Planetary Science Letters
Volume481
Early online date20 Oct 2017
DOIs
Publication statusPublished - 1 Jan 2018

Keywords

  • Magma transport
  • Subduction zone
  • Thermal model

Fingerprint

Dive into the research topics of 'Thermal impact of magmatism in subduction zones'. Together they form a unique fingerprint.

Cite this