b'AEGC 2021Short abstractsdetachment can outcome in minimum accumulation thatThere is no unifying or common geophysical model for caused irregular fault growth. porphyry systems. The different host rock lithologies and compositions, the extent and degree of specific following 61: Expanding the reserve base of operating mines:alteration processes and fracture/faulting system development, Insights from an airborne MobileMT survey in thepossible superimposed infiltrations, post-ore tectonic events, and a current erosion level are all factors which affect the Omsukchan depression, Russian Far East resistivity pattern of porphyry assemblages.Mr Petr Kordi1, Mr Alexander Prikhodko 2, Dr Andrei Bagrianski2We investigated several known porphyry models with and Mr Sergei Trushin1 different geoelectrical patterns by calculating the natural 1 Polymetal International PLC electromagnetic field response from the models followed by 2 Expert Geophysics Limited the models recovery from the noise-added data. The results of the investigation of the synthetic models demonstrated that The Dukat silver-gold ore field occurs in the central section ofthe MobileMT technology has many capabilities for detecting the Omsukchan (or Balygychan-Sugoi) rift-like trough formed inporphyry-ore systems, including those that are deeply located the Early Cretaceous period along a North-South fault system.or masked by challenging post-mineral conductive cover.The framework of the graben-shaped depression (~150 kmThe field examples presented several areas which have long) is intruded by numerous Early and Late Cretaceousbeen flown by the MobileMT system and are prospective granitoid polyphase stocks and plutons, porphyry, and dykes.for porphyry-style mineralization. The field data yielded A number of known epithermal silver-gold deposits andthe characteristic patterns of porphyry systems which were occurrences form the Dukat ore field including the eponymousanalyzed in relation to the synthetic models.worlds third-largest silver deposit. Currently, four deposits are under mining operations in the Polymetals Dukat hub with a predicted end-of-life of 2026. 63: Data geo-science approach for modelling The geology of the region has been explored and well studiedunconventional petroleum ecosystems and their visual from the surface during the last 50 years. The central partanalyticsof the epithermal-type Au-Ag ore field Dukat contains a dome-like structure (a granite-granodiorite pluton) which isDr Shastri Nimmagadda 1, Mr Andrew Ochan2, Dr Neel Mani3 intersected by drill holes at a depth of 1200-1500 m below theand Dr Torsten Reiners1surface. The main elements of the Dukat deposit that govern1 Curtin Universitythe ore bodies structure are sub-vertical zones consisting of2 PAUsystems of sub-parallel shear cracks, zones of mylonite along3 Amity ITfaults, veins controlled by faults, and individual large fractures.In order to develop an exploration concept based on the deepStorage, integration and interoperability are critical challenges structures, a MobileMT survey was carried out over part ofin the unconventional exploration data management. With a the trough structure covering about 1325 km2. The airbornequest to explore unconventional hydrocarbons, in particular, MobileMT EM technology was able to identify: 1) the deepshale gas from fractured-shales, we aim at investigating new dome structure as the main controlling factor of the knownpetroleum data geo-science approaches. The data geo-science Au-Ag mineralization system; 2) other deep dome structures indescribes the integration of geoscience-domain expertise, the depressionpotential for new, near-surface, and buriedcollaborating mathematical concepts, computing algorithms, discoveries; 3) the sub-vertical fault zones as feeding, fluidmachine-learning tools, including data and business analytics. transport channels from deep magmatic bodies to near-surfaceFurther, to strengthen data-science services among producing host rocks, and the resultant alteration and ore zones. The surveycompanies, we propose an integrated multidimensional results were presented in 2D resistivity sections, depth slices uprepository system, for which factual instances are acquired on to 2.5 km depth from surface, 3D isosurfaces, and avoxel. gas shales, to store, process and deliver fractured-data views in new knowledge domains.62: MobileMT for porphyry explorationmodel studiesData dimensions are categorized to examine their suitability and field examples in the integrated prototype articulations that use fracture-networks and attribute dimension model descriptions. The Mr Alexander Prikhodko 1 and Dr Andrei Bagrianski1 factual instances are typically from seismic attributes, seismically interpreted geological structures and reservoirs, well log, 1 Expert Geophysics Limited including production data entities. For designing and developing Resistivity methods are an important part of the arsenal ofmultidimensional repository systems, we create various geophysical techniques for the exploration of porphyry-copperartefacts, describing conceptual, logical and physical models. For style mineralization. MobileMT technology, an airborne,exploring the connectivity between seismic and geology entities, electromagnetic system utilizing natural electromagneticmultidimensional ontology models are construed using fracture fields, has a depth of investigation of up to 2.5 km, significantlynetwork attribute dimensions and their instances. Different data exceeding any controlled-source airborne electromagneticwarehousing and mining are added support to the management system. MobileMT is sensitive to a wide range of resistivitiesof ontologies that can bring the data instances of fractured and to geological formations of any arbitrary geometry. Theshales, to unify and explore the associativity between high-dense advantages offered by the MobileMT technology make itfractured shales and their orientations.especially useful for studying the wide variety of complexThe models depicting collaboration of geology, geophysics, porphyry systems. reservoir engineering and geo-mechanics entities and their 71 PREVIEW AUGUST 2021'