Three-dimensional modelling of geological structures has been long ago one of the most powerful tool for numerical interpretation of gravity, magnetic and thermal fields, which are widely used in geophysics. The success of interpreting geological and geophysical data largely depends on technological computer programmes, which can be used to quickly and clearly obtain information on the environment, to combine it with other data, and to export to available software products, and so on. A new package of automated interpretation of gravity, magnetic and thermal fields (GMT-Auto) has been developed, which allows developing three-dimensional models with a continuous distribution of physical parameters in them for given fields. This makes it possible to analyze the fields in more detail and more fully, because the fitting of the calculated field to the model largely depends on the degree of approximation of the environment in the model. The GMT-Auto package consists of following products.Geophys0 software package is targeted for automated and interactive processing of b/w images of geological and geophysical data, mainly information on isolines and their discontinuity of the first kind (faults, breaks, etc.). Earlier, such tasks were performed using the MAP program, which was also developed at the Institute of Geophysics of the National Academy of Sciences of Ukraine, but it allowed processing maps containing only isolines. The SpaceMap software package is specially designed for calculating geophysical fields of crystalline shields, because it is necessary to put into the computer maps of isolines but objects (areas). Isohypse software package is developed integrate previous software products, such as MAP and Geophys0. The main its advantage is the ability to process both monochrome (b/w) and colour (original maps) images inrectangularor geographic coordinate systems. The package is utilized for the digitization of geological and geophysical objects, represented by isolines and discontinuities, i.e., is by functions with discontinuities of the first kind. Profile software packagewas developed for solving direct problems of gravimetry, magnetometry and geothermic. Magnetic programwas worked out for solving direct problems of magnetometry. The Profile software package is capable to change physical parameters within the prisms by the linear law along the horizontal coordinates on the upper and lower bases or linearly along any vertical line so that physical parameter adopts given valueat prism vertexes. In solving direct problems, horizontally-layered geological features are approximated by a set of inhomogeneous, arbitrarily truncated vertical rectangular prisms. In this case, the contact surfaces are formedbya set of “tiles”, which are bases of prisms. The result of the automated package is a file that contains information about the coordinates of each point on the X-and Y-axes and the value of the field calculated on them. In solving the problem of magnetometry, the source file also contains information about the components of the magnetic field vector and its total value at each point. The package of automated interpretation of gravity, magnetic and thermal fields (GMT-Auto) allows us to develop three-dimensional models of a continuous distribution of physical parameters in them for given fields. This makes it possible to analyze the fields in more detail and more fully, because fitting the calculated field to the model largely depends on the degree of approximation of the environment in the model. The automated system (GMT-Auto) is widely used in solving practical tasks in studies of the complex structure of different geological features utilizing geophysical data. Its applying made it possible to develop new three-dimensional density models, in particular, for the Dnieper-Donetsk basin, Donbas fold belt, the NW Black Sea shelf, the Dutch coastal zone, the shields (Ukrainian, Baltic)and the Voronezh crystalline massif. These models of real geological structures are used in solving practical tasks of geology, tectonics, including the search and exploration of mineral resources.
Key words: mathematical software, software, automated system, 3D modeling of potential fields, scanning.
