GNGTS 2024 - Atti del 42° Convegno Nazionale

Session 3.3 GNGTS 2024 Figure 3. Comparison between Borehole#8 log (yellow star in Fig. 3) and inversion model. Lef – AGMS joint inversion; right – AEM-only inversion. Blue lines – inversion model; black lines – resistvity logs; red lines – rejected data in resistvity log in the joint AGMS inversion. Conclusions The inversion scheme proposed in this study allows an automated integraton of AEM data and resistvity logs, as well as ground-based galvanic VES measurements, even in presence of confictng informaton. The AGMS data norm puts a cap at the misft penalty of outliers, and grants convergence to the inversion without culling valuable informaton out. This approach allows to integrate to AEM surveys a great amount of ancillary data, without the need of careful and tme-consuming data vetng: the accurate inspecton of ancillary informaton could be reserved only to the data rejected by the automated scheme, with the kept data readily usable for further integraton and interpretaton. Furthermore, this automated integraton scheme is fully general, and can be applied not only to AEM data, but to any geophysical problem simply using the appropriate forward modelling.