Abstract
A boundary analysis of the gravity and magnetic fields of the Phlegrean
Fields volcanic area and of the surrounding Campanian Plain reveals
a complex structural setting. The Campanian Plain results well defined
from sharp density boundaries. A set of major E-W lineaments occurs
within the Plain. We derive a framework of the structural control
to the volcanological evolution of Campanian Plain, which appears
strongly influenced by a set of NE-SW lineaments bordering the Acerra
depression. The density and magnetization boundaries of the Phlegrean
Fields are significantly consistent, both indicating for the collapsed
Phlegrean caldera an area considerably less extended than that based
on previous geologically-defined models. Many other structures are
evidenced in the Phlegrean area, often with agreement between density
and magnetization boundaries. Inside the caldera, a strong consistence
between the structures we identified and recent seismicity has been
noted.
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