V.G. Alexeyev – författare

The text describes a system developed for the processing and interpretation of geophysical fields under conditions of uneven relief, variable geological medium, arbitrary magnetization (polarization) and an unknown level of the normal field. The following procedures are developed and elaborated: methods of terrain correction and use of terrain relief complexity for revealing of additional geological information; methods for picking out the useful anomalies against background noises; and advanced methods for the solution of inverse and direct geophysical problems. The developed system and its components have been successfully applied in complicated conditions of the Caucasus and other regions, during prospecting for economic minerals, study of depth structure and near-surface inhomogeneities. The book is intended for researchers, scientists and students in the field of Earth's sciences, specialists in prospecting for hidden mineral deposits and near-surface geophysics.

Books published during recent years in the field of applied geo­ physics can be, in general, divided into two main types. The first type covers such multiaspect books as "Introduction to Geophysics", while the second-special works on fundamental theoretical prob­ lems with an elaborate mathematical description. The books of the first type are mainly intended for beginner students and specialists in adjacent fields. The books of the second type may be useful for teachers and theorists. However, there are also books of another (third) type. These books describe the experience in geophysical in­ vestigation under specific conditions or propose solutions to concrete geological problems, being a methodological guide for geophysicists and concentrating ideas both for advanced students and researchers. Authors hope to give the readers a book of this kind. Interpretation of geophysical fields is a complex consistent pro­ cess. Its successful realization requires: (a) knowledge of geological regularities and geological situation; (b) availability of petrophysical support; (c) mathematical methods of solving direct and inverse problems of geophysics (i.e. computation of geophysical fields from a known source and determination of source characteristics from known fields); (d) application of statistical and logico-informational procedures to the analysis and synthesis of observation results for revealing desired objects and peculiarities of the geological structure.