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Book Chapter

Geology, volcanic history and petrology of Vulcano (central Aeolian archipelago)

By
G. De Astis
G. De Astis
Istituto Nazionale di Geofisica e Vulcanologia – Sezione di Sismologia e Tettonofisica, Via di Vigna Murata 605, 00143 Roma, Italy
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F. Lucchi
F. Lucchi
Dipartimento di Scienze Biologiche, Geologiche e Ambientali, Alma Mater Studiorum, Università di Bologna, Piazza di Porta S.Donato 1, 40126 Bologna, Italy
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P. Dellino
P. Dellino
Dipartimento di Scienze della Terra e Geoambientali, Università di Bari, Via E. Orabona 4, 70125 Bari, Italy
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L. La Volpe
L. La Volpe
Dipartimento di Scienze della Terra e Geoambientali, Università di Bari, Via E. Orabona 4, 70125 Bari, Italy
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C. A. Tranne
C. A. Tranne
Dipartimento di Scienze Biologiche, Geologiche e Ambientali, Alma Mater Studiorum, Università di Bologna, Piazza di Porta S.Donato 1, 40126 Bologna, Italy
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M. L. Frezzotti
M. L. Frezzotti
Dipartimento di Scienze dell'Ambiente e del Territorio e di Scienze della Terra, Università di Milano – Bicocca, Piazza Della Scienza 4, 20126 Milano, Italy
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A. Peccerillo
A. Peccerillo
Dipartimento di Scienze della Terra, Università di Perugia, Piazza Università 1, 06100 Perugia, Italy
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Published:
January 01, 2013

Abstract

Vulcano is an active NW–SE-elongated composite volcano located in the central Aeolian archipelago. Based on available radiometric ages and tephrochronology, the exposed volcanism started at c. 127 ka and spread through eight Eruptive Epochs separated by volcano-tectonic events and major quiescent stages. Various eruptive centres and two intersecting multi-stage calderas resulted from such evolution. Vulcano geological history displays several changes of eruption magnitude, eruption styles and composition of magmas through time. Vulcano rocks range from basalt to rhyolite and show variable alkali contents, roughly increasing during time. Magmas with low to intermediate SiO2 contents and high-K to shoshonite affinity prevail in the early Epochs 1–5 (c. 127–28 ka), whereas intermediate to high-SiO2 shoshonite and potassic alkaline products dominate the last three Epochs (<30 ka). This sharp increase in silicic products is related to the shallowing of the plumbing system and resulting major role of the differentiation processes in shallow-level reservoirs. Radiogenic isotope compositions are variable (87Sr/86Sr=0.70424–0.70587, 143Nd/144Nd=0.51254–0.51276, 206Pb/204Pb=19.305–19.759, 207Pb/204Pb=15.659–15.752, 208Pb/204Pb=39.208–39.559) as a result of both source heterogeneities and shallow-level interaction of magmas with continental crust. The compositional variations of mafic magmatism with time suggest that the source zone changed from a metasomatized, fertile, ocean island basalt- (OIB-) like mantle to a metasomatized depleted lithospheric mantle.

DVD:

The 10 000 scale geological map of Vulcano is included on the DVD in the printed book and can also be accessed online at http://www.geolsoc.org.uk/Memoir37-electronic. Also included is a full geochemical data set for Vulcano.

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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

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