b'Minerals geophysics logarithm of the inversion sensitivityshows a good match between the twoplatform. The technological leap forward contour lines for the DOI reference.resistivity-depth images. offered by the TargetEM is only just Corresponding resistivity-soundingbeing realised, with several software curves from the measurement stationsExpert Geophysics is a companyand processing vendors currently along the line are also shown. Theprimarily driven by R&D; there areworking towards taking advantage of the resistivity section resulting from 2Dmore technicians and engineers oncapabilities of this new exploration tool.inversions of the data along the same linestaff than there are geoscientists. The is shown in the final figure. The 1D andengineering team led by Petr Kuzmin 2D inversion results are consistent; justcontinues to pioneer the latest in AFMAG absolute values of resistivity derived fromtechnologies, with improvements the 2D model should be closer to realityto the MobileMT technology rolling for non-layered conductors. out regularly. Andrei Bagrianski, the companys President and Alexander Ground magnetotelluric data wasPrikhodko, the companys Chief acquired between 0.001 and 250 Hz withGeophysicist, work closely with clients a site spacing of approximately 500 m.to find new technological solutions Twelve frequencies were involved in theto todays geophysical exploration MobileMT data inversion between 27 andproblems. An exciting new development 445 Hz. The depth range of the sectionsdriven by the industrys need for new is limited by the MobileMT depth oftechnology includes the TargetEM investigation estimated for the surveysystem, a new patent pending airborne area. The results of inverting the groundtime-domain electromagnetics system, magnetotelluric data vs the MobileMTwhich combines the latest achievements data are provided in Figure 3. This fieldin electronics and sophisticated signal example demonstrates explorationprocessing techniques to extend the capabilities of the airborne MobileMTcapabilities of current airborne time-technology in a highly conductivedomain systems into the future. The environment with decent depth ofsystem is designed to provide VLF, investigation. Direct comparison of theAFMAG, and time-domain EM data, all airborne EM with ground MT resistivityacquired simultaneously on a singleTargetEM 26 now flying in Australia.As technological advancements continue and improvements are made to the hardware and software involved in the MobileMT technology, it is anticipated to become an increasingly reliable and versatile tool for the mining and resource industry. Advancements to the 1D modelling used to invert the apparent conductivity data and retrieve the resistivity depth distribution are ongoing to improve the agreement between the theory and the real-world implementation. In addition, 2D inversion codes, such as MARE2DEM, and 3D inversions, compatible with MobileMT data, can provide more accurate resistivity models in specific circumstances. With the advent of the TargetEM, which sees the merging of the very best of time domain, VLF and AFMAG technology, the future looks bright for Airborne EM surveying globally and in Australia specifically as the ability to acquire data across a broader range of resistivities and explore deeper from the air than ever before offers new and much Figure 3.Resistivity sections over the same line derived and inverted from MobileMT and from ground MTneeded technical capability to Australian data provided by CODA Minerals. Emmie Bluff block. mineral explorers.AUGUST 2023 PREVIEW 36'