Unveiling density and magnetic structure of the Cǎlimani Caldera by geophysical means

DATA ACQUISITION AND PROCESSING The paper aims at presenting some preliminary results of a relatively recent gravity survey conducted in the area of the Cǎlimani Caldera and its neighbouring Rusca-Tihu Volcano, the most important volcanic forms within Cǎlimani Mountains. Geomagnetic data gathered during a previously conducted regional airborne survey, to which some ground total intensity observations were added during the gravity campaign, have been also used. Various filters were applied to data (e.g., upward continuation to a horizontal plan at an altitude immediately above the highest topography, reduced to the pole geomagnetic anomaly, vertical and horizontal derivatives, analytical signal, or power spectra).