Generalization of study experience of Ural ore deposits by method of tectonophysical analysis gravitational field

R Apakashev,A Glebov,D Simisinov,Ksenya Vandysheva,Lubov Boltnova,Vladimir Philatov

doi:10.1051/e3sconf/202017702001

R Apakashev, A Glebov + Show 4 more

Open Access

https://doi.org/10.1051/e3sconf/202017702001

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Abstract

Gravity is important in the history of Earth 's formation and evolution. Gravitational accretion, gravitational differentiation of Earth matter by density. Gravitational accretion, gravity differentiation of the Earth 's substance in density, its movement and other processes deform the Earth 's crust, contribute to the formation in it of different scale, shape and metallogenical specialization of plicative and disjunctive structures, with which genetically and spatially related deposits of different minerals. The link between gravity and deformation of the geological medium is its density inhomogeneities. Their role is twofold: they are either formed by gravity stresses or are themselves sources of stress and strain. The method of studying the deformation of the geological medium by gravity is called tectonophysical analysis of the gravitational field. Its physical basis is two fundamental laws: the law of world gravity and the law on proportional dependence between stress and deformation. This method solves two problems.

Highlights

Density inhomogeneities are the cause of tectogenesis create anomalies in the field of gravity
The physical basis of this dependence is the law of world gravity and the laws of deformation of hard bodies, describing their reactions to external force
If in the classical tectonophysical analysis the characteristics of the deformation of the geological medium are determined by studying the elements of its deformation, using the dependencies between the components of the displacement vector and the potential of gravity, these same characteristics can be determined from the results of the measurement of the stress of the gravity field [1]

Summary

Introduction

Density inhomogeneities are the cause of tectogenesis create anomalies in the field of gravity. The original theoretical prerequisite for establishing the relationship between deformation characteristics and gravity was the problem known in the theory of elasticity of displacements caused by an arbitrarily oriented force in a uniform elastic half-space This task has been generalized in the case where in a uniform elastic half-space there is an arbitrary density non-uniformity in shape and size, the volume of which is uniformly distributed gravity. These formulas allow you to calculate different deformation characteristics: deformation tensor components, pure deformation tensor components, principal values, and determine the orientation of the principal deformation axes, as well as various invariants, i.e., solve the problem of classical tectonophysical analysis. If in the classical tectonophysical analysis the characteristics of the deformation of the geological medium (and stresses) are determined by studying the elements of its deformation (cracks, breaks, folds, etc.), using the dependencies between the components of the displacement vector and the potential of gravity, these same characteristics can be determined from the results of the measurement of the stress of the gravity field [1]

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