Petrophysical parameters of gabbrodolerites of the novogolsky complex (Voronezh crystal massif)

Abstract

Introduction: The results of statistical analysis of petrophysical parameters of magmatogenic formations of the novogolsky complex of the Voronezh crystal massif are considered. The study of gabbrodolerite massifs of the novogolsky complex is an important task due to their prospects for non-ferrous and precious metals. Methodology: The representativeness of petrophysical data made it possible to perform not only traditional statistical analysis, but also to apply the method of group accounting of arguments in order to create identification models combining petrophysical and spatial attributes in a single characteristic equation. The initial processing made it possible to form statistically homogeneous data samples, which were then analyzed using the MGUA. To implement the method, a unique software developed at the Department of Geophysics was used. Results and discussion: As a result of the analysis of the MGUA for rocks of the novogolsky complex, two identification models were obtained: model 1, which combines all petrophysical characteristics (density (σ), magnetic susceptibility (ϰ) and elastic wave velocity (V) in a single model equation σ =f(ϰ,V) and model 2, which allows to estimate the density of rocks by sampling depth (H) and elastic wave velocity: σ =f(V,H). Conclusions: The obtained models can be considered as a complex petrophysical characteristic of rocks. The first model can be effectively used to solve classification problems, as well as in the procedure of complex interpretation of geophysical data in order to construct realistic 3D structures of the upper crust. The second model reveals a pronounced relationship between the density, the velocity of longitudinal waves and the depth of sampling, which can serve as an indirect confirmation of the assumption about the stratification of gabbro-dolerite massifs of the Novogolsky complex.