10. Regional/Global Structural Applications
Computer Technology for Integrated Analysis and Interpretation of Geological and Geophysical Data for Regional Profiles
Cheremisina Evgenia, Galuev Vladimir, Kaplan Samuel and Malinina Svetlana
VNIIgeosystem, Russia.
Abstract
A system of deep geological and geophysical survey is aimed at study of the geological structure and geodynamic situation in mineragenetic provinces and regions, and global and regional geological structures. Survey is performed along regional profiles using a combination of geophysical methods including gravity, magnetic, electric (magneto-telluric sounding - MTS), seismic (reflection survey – CMP) surveys and deep seismic sounding (refracted survey). The technique and technology of integrated analysis and interpretation of geological and geophysical data include the following stages: 1) Building an a priori model; 2) Processing and interpretation of specific geophysical data; 3) Integrated analysis and interpretation. Specific models built for individual geophysical methods – seismic, electric, magnetic, and density are correlated with each other in space (often they are not complying spatially) and projected to the same profile and tied by depth parameters. Next, these spatially tied models are correlated by geometrical and physical parameters. Within the limits of a generalized geometrical framework produced by the correlation of individual geophysical models it is possible to switch to a physical description of identified blocks using a combination of various physical parameters – velocity, density, magnetic susceptibility, and electric resistivity. A resulting qualitative integrated model is used as a basis for a more detailed integrated analysis using the analytical methods of complex data processing. Al the above-mentioned stages are implemented using technological and analytical tools of GIS INTEGRO – GEOPHYSICS software system (VNIIgeosystem ,Russia) which includes modules providing for processing and interpretation of potential geophysical fields, seismic data, electric survey data, and module supporting the integrated processing and interpretation.
Last modified: Mon May 01 16:20:27 2006