GNGTS 2016 - Atti del 35° Convegno Nazionale

GNGTS 2016 S essione 3.1 505 Juracic et al. , 2004). The Moho boundary beneath this region is around 30 km deep in central Adriatic and increases down to 38-40 km depth in the Croatian region (Fig. 1) and the heat flow ranges between 30 and 40 mW m −2 (Scrocca et al. , 2003). In the last decade, previous magnetic field studies pointed out the wide magnetic anomaly as due to uplift of the magnetic basement and the presence of volcanic and/or ophiolitic intrasediment sources (Giori et al. , 2007; Mancinelli et al. , 2015). These interpretations were carried out by using an integrated dataset from Italian and Croatian national oil companies (Giori et al. , 2007). Such magnetic dataset has not a complete regional coverage and just the south-western part of the Adriatic anomaly was considered. In this work we used a 1 km resolution grid provided by Getech and being part of the EMMP project, which aimed to bring together all available magnetic data to yield a high-resolution total magnetic intensity field grid over the European region (for more details see Fletcher et al. , 2009). This dataset covers completely the area of study and the magnetic field map at 3 km altitude is shown in Fig. 2. In this map the Adriatic magnetic anomaly is characterized by a wide magnetic high above the central Adriatic and the coast of Croatia and the relative magnetic low to the NE. Fig. 2 – Total magnetic field of the study area (up); Multiridge section of the 3rd derivative order along profile AA’ (down). The red straight lines converge at singular points in the source region.