Middle Miocene peralkaline ignimbrites in the Hermosillo region (Sonora, Mexico): Geodynamic implications

Jesús Vidal Solano, Francisco A. Paz Moreno, Alexander Iriondo, Alain Demant, Jean Jacques Cochemé

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

Scattered ignimbritic mesas crop out in the Hermosillo region (Sonora, Mexico). These rocks that have been dated at 12.5 Ma (Middle Miocene) have the petrography and chemical characteristics of comendites. Such a flare-up of peralkaline acidic volcanism, after a long period of subduction-related arc volcanism, emphasises an important change in the source of volcanism. It corresponds to the latest stage of continental extension prior to the marine invasion and the development of spreading centres in the Gulf of California. © 2005 Académie des sciences. Published by Elsevier SAS. All rights reserved.
Original languageAmerican English
Pages (from-to)1421-1430
Number of pages10
JournalComptes Rendus - Geoscience
DOIs
StatePublished - 1 Dec 2005

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