Skip to main content

Research Repository

Advanced Search

Interaction between mantle-derived magma and lower arc crust: quantitative reactive melt flow modeling using STyx

Riel, Nicolas; Bouilhol, Pierre; van Hunen, Jeroen; Cornet, Julien; Magni, Valentina; Grigorova, Vili; Velic, Marco

Interaction between mantle-derived magma and lower arc crust: quantitative reactive melt flow modeling using STyx Thumbnail


Authors

Nicolas Riel

Pierre Bouilhol

Julien Cornet

Valentina Magni

Vili Grigorova

Marco Velic



Abstract

The magmatic processes occurring in the lowermost arc crust play a major role in the evolution of mantle-wedge-derived melt. Geological evidence indicates that mantle-derived magmas and in-situ products of lower crust partial melting are reacting in a pervasive melt system and are eventually extracted towards higher levels of the crust. Resolving the relative contribution of mantle-derived magma and partial melting products of pre-existing crust is essential to: (1) quantify crustal growth rate; (2) better understand the compositional range of arc magmatic series; and (3) constrain the chemical differentiation of the lower crust. In this study, we present STyx, a new modelling tool, coupling melt and heat flow with petrology to explore the dynamics of storage, transfer and hybridization of melts in complex liquid/rock systems. We perform three models representing a magmatic event affecting an amphibolitic lower arc crust in order to quantify the relative contribution between partial melting of the pre-existing crust and fractional crystallization from mantle-derived hydrous-magma. Our models demonstrate that most of the differentiated arc crust is juvenile, deriving from the differentiation of mantle melts, and that pre-existing crust does not significantly contribute to the total thickness of magmatic products.

Citation

Riel, N., Bouilhol, P., van Hunen, J., Cornet, J., Magni, V., Grigorova, V., & Velic, M. (2018). Interaction between mantle-derived magma and lower arc crust: quantitative reactive melt flow modeling using STyx. Geological Society Special Publications, 478, 65-87. https://doi.org/10.1144/sp478.6

Journal Article Type Article
Acceptance Date Feb 20, 2018
Online Publication Date Apr 16, 2018
Publication Date Apr 16, 2018
Deposit Date Mar 25, 2018
Publicly Available Date Apr 16, 2019
Journal Geological Society Special Publications
Print ISSN 0305-8719
Electronic ISSN 2041-4927
Publisher The Geological Society
Peer Reviewed Peer Reviewed
Volume 478
Pages 65-87
DOI https://doi.org/10.1144/sp478.6
Public URL https://durham-repository.worktribe.com/output/1363537

Files






You might also like



Downloadable Citations