Case study of a cluster of simple and complex monogenetic volcanoes in the north‐east part of the Michoacan–Guanajuato Volcanic Field, Central Mexico: Nomenclature implications

With the advent of new terminologies to categorize and characterize the simple and complex monogenetic volcanoes, also came the semantic issues, which caused a predicament for the usage of terms like simple, complex, polycyclic, polymagmatic, complex monogenetic volcanoes with polygenetic inheritanc...

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Bibliographic Details
Published in:Geological journal (Chichester, England) England), 2024-10, Vol.59 (10), p.2750-2771
Main Authors: Kshirsagar, Pooja, Aviles, Raúl Miranda, Puy y Alquiza, María Jésus, Chako Tchamabe, Boris, Dominguez, Andrés Josué Campos
Format: Article
Language:English
Subjects:
Clusters
Eruptions
Geochemistry
Lava
Magma
Michoacan–Guanajuato Volcanic Field
monogenetic clusters
monogenetic complex
Mounds
Nomenclature
Nomenclatures
Petrography
Petrology
polycyclic
polymagmatic
Stratigraphy
Subduction
Tephra
Tuff
Volcanic activity
Volcanic eruptions
Volcanic fields
Volcanoes
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Summary:With the advent of new terminologies to categorize and characterize the simple and complex monogenetic volcanoes, also came the semantic issues, which caused a predicament for the usage of terms like simple, complex, polycyclic, polymagmatic, complex monogenetic volcanoes with polygenetic inheritance. To analyse and validate this nomenclature, we studied an overlapping volcanic structure located south of the present‐day town of Irapuato, Central Mexico, that appears to be a monogenetic complex at first sight. Field observations, tephra stratigraphy, petrography and geochemistry of the tephra deposits confirms that the structure is in fact a cluster of three simple (San Joaquin tuff ring and two scoria mounds) and one complex, polycyclic, polymagmatic (La Sanabria‐San Roque tuff ring) monogenetic volcanoes formed by independent events, governed by distinct conduits and magma bodies of different origin (subduction‐related, OIB and E‐MORB origin) and separated by different tephra sequences of dissimilar components and depositional characteristics. We estimate the magma volumes (using the juvenile content and their vesicularity percentage) to be at 0.40–1.31 × 108, 0.25 × 108 and 0.42–0.90 × 108 m3 for San Joaquin, La Sanabria and San Roque, reckoning an eruption duration of 77 and 48 and 81 days, respectively (considering an average eruption rate of 6 m3/s from the well‐documented shallow crater (
ISSN:0072-1050
1099-1034
DOI:10.1002/gj.5025