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http://hdl.handle.net/2122/11092
Authors: | Paoletti, V.* Passaro, S.* Fedi, M.* Marino, C.* Tamburrino, S.* Ventura, Guido* |
Title: | Subcircular conduits and dikes offshore the Somma-Vesuvius volcano revealed by magnetic and seismic data | Journal: | Geophysical Research Letters | Series/Report no.: | /43 (2016) | Issue Date: | 2016 | DOI: | 10.1002/2016GL070271 | Abstract: | We analyzed new magnetic, bathymetric, and seismic data acquired in the offshore sector of Somma-Vesuvius volcano (Italy). We detected a group of high-intensity, short wavelength magnetic anomalies corresponding to partly buried volcanic dome-like structures located by seismic data. The magnetic anomalies are aligned along a NW-SE strike that is the preferential orientation of an eruptive fracture of the pre-19 ka activity of Vesuvius. Four cones emplaced after the Last Glacial Maximum (19 ka), whereas a fifth one emplaced more recently suggesting a rejuvenation of the eruptive system offshore the volcano in historical times. We also identified a NE-SW elongated magnetic anomaly consistent with a dike-like body associated to an on-land tectonic structure that was active in recent times at Vesuvius. A delta-like area with diffuse low-intensity magnetic anomalies reflects the seaward fronts of lava flows that entered the sea mainly during the Middle Ages. |
Appears in Collections: | Article published / in press |
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File | Description | Size | Format | |
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Paoletti et al 2016 GRL.pdf | 1.03 MB | Adobe PDF | View/Open |
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