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Book Chapter

Airborne thermal remote sensing of the Volcán de Colima (Mexico) lava dome from 2007 to 2010

By
William Hutchison
William Hutchison
1
COMET+, Department of Earth Sciences, University of Oxford, Oxford OX1 3AN, UK
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Nick Varley
Nick Varley
2
Facultad de Ciencias, Universidad de Colima, Bernal Díaz del Castillo 340, Colima, Col. C.P. 28045, Mexico
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David M. Pyle
David M. Pyle
1
COMET+, Department of Earth Sciences, University of Oxford, Oxford OX1 3AN, UK
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Tamsin A. Mather
Tamsin A. Mather
1
COMET+, Department of Earth Sciences, University of Oxford, Oxford OX1 3AN, UK
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John A. Stevenson
John A. Stevenson
3
School of Geosciences, Edinburgh University, Edinburgh EH9 3JW, UK
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Published:
January 01, 2013

Abstract

We investigate high-resolution digital photographs and infrared images of the lava dome eruption at Volcán de Colima, from 2007 to 2010. Qualitative observations provide insight into active volcanic processes (e.g. rockfalls and fracturing) and show that, as the dome advances a substantial cooled talus apron develops, which stabilizes the structure. Progressive collapse of the talus apron as it reaches the crater rim corresponds with the development of a lava lobe, extruding hot lava from deeper within the dome. Quantitative dome surface temperature time-series show that the highest temperature hotspots migrate from the dome sides (250–380 °C) to the top (150–300 °C) and finally to the lava lobe (220–400 °C) as the structurally unstable areas expose fresh material. Net surface heat loss from the dome ranges from 5 to 30 MW, comparable to other dome forming systems. Heat budget calculations confirm that the lava dome retained a hot viscous core throughout the period 2007–2010. We propose that the mechanical stability of the Volcán de Colima dome arises from the shear strength of flanking talus which stabilizes the hot viscous core.

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Contents

Geological Society, London, Special Publications

Remote Sensing of Volcanoes and Volcanic Processes: Integrating Observation and Modelling

D. M. Pyle
D. M. Pyle
University of Oxford, UK
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T. A. Mather
T. A. Mather
University of Oxford, UK
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J. Biggs
J. Biggs
University of Bristol, UK
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Geological Society of London
Volume
380
ISBN electronic:
9781862396456
Publication date:
January 01, 2013

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