Kalia Limited provided the update on the geophysical survey recently completed in Bougainville. An airborne magnetic and radiometric survey was carried out over EL03 and EL04 during the second half of 2018. The survey was conducted by Thomson Aviation between August and November 2018 and the final data received in January 2019. The magnetic response across the survey area, particularly in EL04 (western side); is strongly dominated by an apparent topographic signature. A series of modelling tests by Fathom Geophysics (forward modelling and inversion of the residual topographic surface) has shown that the response is not purely topographic and is most likely due to variations in the thickness of the volcanic units ­ thick in some places and excised in others (the sharp valleys). Preliminary inversion modelling has worked well to highlight deeper intrusive sources as well as deep-seated structural pathways; and further project specific filtering and inversion will be carried out to refine the products for detailed interpretation and targeting. In the interim, the drape normalized, reduced to the pole (RTP) data are being used to undertake first stage filtering, analysis and interpretation of the survey data. The residual pseudo-gravity data are shown in the image in Figure 1. A linear stretch with shading from the northeast has been applied. The Pseudo-gravity filter, which involves both pole reduction and vertical integration (removal of the dipolar field); enhances the deeper component of the signal; highlighting deeper magnetic intrusions and deep-seated structures. While the volcanic (pseudo- topographic) response is still strongly evident, the intrusive complex and its complexities are clearly discernible. The 2018 survey data replicates the anomalies seen in the 1980's data, but with much better spatial resolution and coverage. Peter Batten, Technical Director of Kalia Limited, stated "2019 has commenced with fieldwork in EL03 toward the Teoveane - Puspa target with work scheduled to focus there and at Melilup this month. To quote Fathom Geophysics, this new dataset will provide an excellent insight into the geology and structural framework of the project area and assist with optimizing on-ground target follow-up. This will allow the team to more accurately plan for expeditions onto known targets and is especially important for EL04 where the complete lack of geophysical data has hampered effective exploration activities.