RT Journal Article
T1 The pristine precursor of Andean‑type magmatism preserved in magma mingling zones
A1 Gómez Frutos, Daniel
A1 Castro Dorado, Antonio
A1 Rosa Díaz, Jesús de la
AB Intermediate magma compositions have been postulated to be parental to Andean-type magmatismin the recent years. Geochemical and experimental methods have allowed the modelling of ahypothetical parental composition that accounts for the major element trends displayed by Andeantypebatholiths. However, natural plutonic examples matching the modelled composition remainlacking, likely due to the predominance of fractionated liquids and cumulates in the batholiths afterprotracted and large-scale differentiation. Contrary to this, magma mingling zones, a common featurein Andean-type batholiths, are characterised by quenching phenomena, minimising differentiation.In this paper, we present data from intermediate magmatism in the world-class Gerena magmamingling zone in the Seville Sierra Norte batholith (southern Iberia), compositionally equivalent toAndean-type magmatic series. Geochemical data from quenched dark globules of variable scale andthe corresponding host granodiorites are contrasted with the bimodal trends displayed by the hostbatholith. Results suggest that the smaller-scale dark globules have not undergone any significantfractionation. Furthermore, after conducting geochemical modelling we conclude the dark globulesrepresent a composition that could be parental to Andean-type magmas. We propose that magmamingling zones are an optimal place to probe for parental magmas of Andean-type magmatism,particularly those represented in pristine melanocratic, intermediate globules.
PB Springer
SN 2045-2322 (electrónico)
YR 2024
FD 2024
LK https://hdl.handle.net/10272/23603
UL https://hdl.handle.net/10272/23603
LA eng
NO Gómez-Frutos, D., Castro, A., & de la Rosa, J. (2024). The pristine precursor of Andean-type magmatism preserved in magma mingling zones. In Scientific Reports (Vol. 14, Issue 1). Springer Science and Business Media LLC. https://doi.org/10.1038/s41598-024-55699-x
NO This work was supported through the Spanish Research Agency (AEI) IBERCRUST II/PID2021-126347NB-I00/AEI/10.13039/501100011033/FEDER,UE. The authors want to thank Gary S. Michelfelder, Adam Curry and twoanonymous reviewers for their constructive criticism that helped improve this manuscript.
DS Repositorio Institucional de la Universidad de Huelva
RD 14 jul 2026