Effects of aseismic ridge subduction on geochemistry of frontal arc magmas

This is a Preprint and has not been peer reviewed. The published version of this Preprint is available: https://doi.org/10.1016/j.epsl.2019.115984. This is version 1 of this Preprint.

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Authors

Massimo Chiaradia

Abstract

Aseismic ridge subduction is considered to exert major controls on volcanic activity, formation of porphyry Cu-Au deposits and the generation of juvenile Earth’s crust. Yet, there are almost no studies that have addressed in a systematic way the effects of this process on the geochemistry of arc magmas. Here we explore the role of the subducted aseismic Carnegie ridge on modulating frontal arc magma chemistry in the Ecuadorian-southernmost Colombian frontal arc. We show the occurrence of symmetric changes of several geochemical indices (Th, Nd, Sm, Nb, Th/La, Ba/Th) and evolutionary paths (Na2O-SiO2 correlations) in frontal volcanic arc rocks...  more

DOI

https://doi.org/10.31223/osf.io/w4sxp

Subjects

Earth Sciences, Geochemistry, Physical Sciences and Mathematics

Keywords

Dates

Published: 2019-12-13 15:57

License

CC BY Attribution 4.0 International