Cookies

We use cookies to ensure that we give you the best experience on our website. By continuing to browse this repository, you give consent for essential cookies to be used. You can read more about our Privacy and Cookie Policy.


Durham Research Online
You are in:

Interplinian effusive activity at Popocatepetl volcano, Mexico : new insights into evolution and dynamics of the plumbing system.

Mangler, Martin and Prytulak, Julie and Gisbert, Guillem and Delgado-Granados, Hugo and Petrone, Chiara (2019) 'Interplinian effusive activity at Popocatepetl volcano, Mexico : new insights into evolution and dynamics of the plumbing system.', Volcanica., 2 (1). pp. 45-72.

Abstract

Effusive eruptions dominate the eruptive record of many arc volcanoes and may hold crucial information about their plumbing systems, yet they are underrepresented in geochemical and petrological studies. Here, we present whole rock major and trace element data as well as Sr–Nd–Hf isotopic compositions for 14 lava flows and four Plinian eruptions of the Popocatépetl Volcanic Complex (PVC) in the last ~23.5 ka, allowing the first comprehensive geochemical characterisation of the dynamics and evolution of its plumbing system. Lavas and pumices of the PVC are andesites–dacites with a narrow compositional range showing no first-order geochemical trends in the last ~23.5 ka. Trace element and isotope ratios show that PVC magmas are derived from a depleted mantle source with a component of subducted sediments. Assimilation-fractional crystallisation models show that magma compositions are modified to varying degrees by assimilation of lower and upper crust en route to the surface. In the shallow plumbing system, geochemically distinct magmas coexist and undergo extensive mixing and hybridisation, thus buffering erupted whole rock compositions. Only few flank eruptions sample more primitive magmas from deeper reservoirs that circumvented the shallow plumbing system. Some Plinian eruptions caused compositional shifts reflecting reconfigurations of the plumbing system, which also affected subsequent effusive eruptions. Our study thus shows that the geochemical variability of PVC magmas in the last ~23.5 ka is dominated by crustal processes, and magma hybridisation is the primary mechanism to produce the buffered whole rock compositions of the PVC.

Item Type:Article
Full text:(VoR) Version of Record
Download Microsoft Excel (Supplementary information 1)
(100Kb)
Full text:(VoR) Version of Record
Available under License - Creative Commons Attribution.
Download Microsoft Excel (Supplementary information 2)
(95Kb)
Full text:(VoR) Version of Record
Available under License - Creative Commons Attribution.
Download PDF
(25538Kb)
Status:Peer-reviewed
Publisher Web site:https://doi.org/10.30909/vol.02.01.4572
Publisher statement:This work is licensed under a Creative Commons Attribution 4.0 International License.
Date accepted:18 April 2019
Date deposited:08 May 2019
Date of first online publication:06 May 2019
Date first made open access:No date available

Save or Share this output

Export:
Export
Look up in GoogleScholar