Abstract
We here present and discuss the results of the analysis and qualitative
interpretation of two magnetic surveys performed in the Bay of Naples
in 1998 and 2000. A map of the Bay of Naples based on the data acquired
during these surveys has already been published by the Italian CNR-IAMC
Research Institute. We re-processed the same data to produce maps
of the pole reduced, analytic signal and horizontal derivative data
and correlated them with the bathymetry and the gravimetric data
of the area. The analysis shows strong anomalies in the NW and NE
volcanic areas of the Bay of Naples, while the central area seems
magnetically quiet. In the Phlegrean area the maps clearly show the
southern rim of the Phlegrean caldera and demonstrate that while
the Magnaghi Canyon is correlated to gravimetric highs and magnetic
structures, and can therefore be interpreted as an active lineament,
most of Dohrn Canyon is not characterized by volcanic activity and
does not correlate to any gravimetric or magnetic structures. An
important round-shaped magnetic anomaly is for the first time identified
in the central slope of the gulf between the two canyons, probably
correlated to a large buried volcanic edifice. In the Vesuvian area
some intense circular anomalies, aligned in the NNW-SSE direction,
are localized in the Torre del Greco and Torre Annunziata offshore,
related to the submerged part of Vesuvius and possibly connected
to buried vents.
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