Abstract
In this paper we present and analyze the new detailed aeromagnetic
data set resulting from a recent survey carried out in the Phlegrean
Fields volcanic area. The survey was aimed at gaining new insight
into the volcanological characteristics of the region north of Phlegrean
Fields (Parete-Villa Literno area) where remarkable thickness of
volcanic/sub-volcanic rocks were found in wells. Measurement of total
magnetic field was performed on two different flight levels, 70 m
and 400 m above the ground surface, along flight lines spaced 400
m apart. Both aeromagnetic maps show the noisy effect of linear anomalies
evidently due to the presence of railway lines. To filter out these
local anomalies a method based on discrete wavelet transform was
used, allowing an accurate local filtering and leaving the rest of
the field practically unchanged. The filtered data set was integrated
with the existing Agip aeromagnetic map of the Phlegrean Fields,
leading to a new aeromagnetic map of the whole Phlegrean volcanic
area. The compilation of the pole reduced map and of the maps of
the Analytic Signal and of the Horizontal Derivative of the integrated
data set represents a first step for the interpretation of the maps
in terms of geological structures of the whole Phlegrean volcanic
district.
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