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Volcanological and structural evolution of the Ischia resurgent caldera (Italy) over the past 10 k.y.

By
Sandro de Vita
Sandro de Vita
Istituto Nazionale di Geofisica e Vulcanologia–Osservatorio Vesuviano, Naples Via Diocleziano, 328-80124, Italy
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Fabio Sansivero
Fabio Sansivero
Istituto Nazionale di Geofisica e Vulcanologia–Osservatorio Vesuviano, Naples Via Diocleziano, 328-80124, Italy
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Giovanni Orsi
Giovanni Orsi
Istituto Nazionale di Geofisica e Vulcanologia–Osservatorio Vesuviano, Naples Via Diocleziano, 328-80124, Italy
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Enrica Marotta
Enrica Marotta
Istituto Nazionale di Geofisica e Vulcanologia–Osservatorio Vesuviano, Naples Via Diocleziano, 328-80124, Italy
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Monica Piochi
Monica Piochi
Istituto Nazionale di Geofisica e Vulcanologia–Osservatorio Vesuviano, Naples Via Diocleziano, 328-80124, Italy
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Published:
April 01, 2010

Volcanic activity on the island of Ischia in the past 10 k.y. has included both effusive and explosive eruptions, mainly in the eastern sector of the island. Vent location, eruption dynamics, transport mechanisms, and depositional processes have been reconstructed for each recognized lithostratigraphic unit. Periods of quiescence have alternated with periods of very intense volcanism, mainly concentrated at ca. 5.5 ka and over the past 2.9 k.y. Volcanism has not been continuous, but it has been strongly influenced by the mechanism of a resurgence phenomenon that has affected the island since ca. 33 ka. Therefore, it has been hypothesized that magma intrusion and uplift events have occurred intermittently. In the past 5.5 k.y., volcanic activity has been invariably accompanied by the emplacement of slope instability–related deposits, illustrating that the slope instability was also induced by reactivation of vertical movements, likely related to resurgence.

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Contents

GSA Special Papers

Stratigraphy and Geology of Volcanic Areas

Gianluca Groppelli
Gianluca Groppelli
Consiglio Nazionale delle Ricerche, Istituto per la Dinamica dei Processi Ambientali, Sezione di Milano, Milano, Italy
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Lothar Viereck-Goette
Lothar Viereck-Goette
Institut für Geowissenschaften, Friedrich-Schiller-Universität Jena, Jena, Germany
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Geological Society of America
Volume
464
ISBN print:
9780813724645
Publication date:
April 01, 2010

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