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Book Chapter

Kinematics of the Aeolian volcanism (Southern Tyrrhenian Sea) from geophysical and geological data

By
Guido Ventura
Guido Ventura
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Published:
January 01, 2013

Abstract

The Aeolian volcanism (c. 1 Ma active) develops within the Africa–Eurasia convergence setting, which is characterized by the subduction of the Ionian plate below the Calabrian Arc. Deep earthquakes occur to the east of a tear fault that divides the Aeolian Islands into two sectors: (a) an eastern sector characterized by active volcanism, reduced crustal thickness, high seismic flux, low P-wave velocity (Vp) and attenuation (Qp) and NE–SW extension; (b) a western sector where a NNW–SSE compressive strain along a WNW–ESE-striking fault system is acting. The geophysical and structural features of the eastern sector are consistent with upwelling and SE migration of the asthenospheric mantle. The extensional and strike-slip strain allow the magma to upraise along dyke-like conduits and to erupt. Earthquake-induced strain changes may trigger volcanic eruptions and degassing episodes. The oldest volcanism (Pliocene–Early Pleistocene) was controlled by a WNW–ESE-striking tear fault related to the SE rollback of the slab. A new tear, the Tindari–Letojanni Fault System, started during the Middle–Late Pleistocene and represents the active western boundary of the subducting slab. The present-day Aeolian volcanism is associated with rifting processes developing within an arc collision zone.

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Contents

Geological Society, London, Memoirs

The Aeolian Islands Volcanoes

F. Lucchi
F. Lucchi
University of Bologna, Italy
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A. Peccerillo
A. Peccerillo
University of Perugia, Italy
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J. Keller
J. Keller
University Freiburg, Germany
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C. A. Tranne
C. A. Tranne
University of Bologna, Italy
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P. L. Rossi
P. L. Rossi
University of Bologna, Italy
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Geological Society of London
Volume
37
ISBN electronic:
9781862396371
Publication date:
January 01, 2013

GeoRef

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