Morphology, Effusion Rates, and Petrology of Postglacial Lavas of Laguna del Maule Volcanic Field, Chilean Andes, and Implications for Their Plumbing System

We analyzed the dimensions, morphology, and petrography of nine postglacial lava flows, ranging from andesites to rhyolites, located at the Laguna del Maule Volcanic Field in the Southern Andes of Chile. Our data were used in conjunction with theoretical models of magma ascent and lava flow advance...

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Bibliographic Details
Published in:Geochemistry, geophysics, geosystems : G3 geophysics, geosystems : G3, 2018-12, Vol.19 (12), p.4925-4944
Main Authors: Cáceres, Francisco, Castruccio, Ángelo, Parada, Miguel A.
Format: Article
Language:English
Subjects:
Crystallization
Dimensions
Duration
effusive rates
Geophysical studies
Laguna del Maule
Lava
Lava flows
Magma
Magma chambers
Morphology
Petrography
Petrology
plumbing system
Rhyolites
Volcanic eruptions
Volcanic fields
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Summary:We analyzed the dimensions, morphology, and petrography of nine postglacial lava flows, ranging from andesites to rhyolites, located at the Laguna del Maule Volcanic Field in the Southern Andes of Chile. Our data were used in conjunction with theoretical models of magma ascent and lava flow advance to estimate time scales of lava emplacement, effusion rates, magma chamber volume, and conduit dimensions. The results indicate that the parameters of these past eruptions correspond to eruptions of months to a few years in duration, with peak effusion rates
ISSN:1525-2027
1525-2027
DOI:10.1029/2018GC007817