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The development of the Deception Island volcano caldera under control of the Bransfield Basin sinistral strike-slip tectonic regime (NW Antarctica)

By
F. C. Lopes
F. C. Lopes
Centre for Geophysics of the University of Coimbra, Coimbra, PortugalDepartment of Earth Sciences, University of Coimbra, 3000-272 Coimbra, Portugal
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A. T. Caselli
A. T. Caselli
Grupo de Estudio y Seguimiento de Volcanes Activos, Int. Güiraldes 2160 – Ciudad Universitaria, Pab.2. C1428EHA, Buenos Aires, Argentina
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A. Machado
A. Machado
Centre for Geophysics of the University of Coimbra, Coimbra, Portugal
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M. T. Barata
M. T. Barata
Centre for Geophysics of the University of Coimbra, Coimbra, Portugal
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Published:
January 01, 2015

Abstract

Deception Island is a small and volcanically active caldera volcano of Quaternary age, located in the marginal basin of Bransfield Strait, NW Antarctica. The distribution and orientation of fracture and fault systems that have affected the Deception volcanic edifice, and the elongated geometry of its volcanic caldera, are consistent with a model of Riedel deformation induced by a regional left-lateral simple shear zone. It is suggested that this caldera was formed above a magma chamber stretched under the influence of the regional transtensional regime with left-lateral simple shear. The collapse may have occurred in at least two phases: first, a small volume event occurred along the compressed flanks of the volcano edifice; and second, a large collapse event affected the stretched flanks of the volcano edifice.

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Contents

Geological Society, London, Special Publications

Volcanism and Tectonism Across the Inner Solar System

T. Platz
T. Platz
Planetary Science Institute, USA
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M. Massironi
M. Massironi
Università degli Studi di Padova, Italy
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P. K. Byrne
P. K. Byrne
Lunar and Planetary Institute, USA
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H. Hiesinger
H. Hiesinger
Westfälische Wilhelms-Universitä Münster, Germany
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Geological Society of London
Volume
401
ISBN electronic:
9781862396777
Publication date:
January 01, 2015

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