Kinematics of minor disjunctive structures and tectonic stresses in the southern part of the Khibiny massif
Bondar I.V., Marinin A.V., Sim L.A.
Sсhmidt Institute of Physics of the Earth of the Russian Academy of Sciences, Moscow, Russian Federation
Russian Mining Industry №1S / 2023 р. 116-121
Abstract: The article analyzes the stress state of the southern part of the Khibiny massif on the basis of field measurements of the spatial orientation of slickenside collected by the authors in 2009–2019. Mining is actively going on within the massif, and the problem of excess horizontal stresses is acute during the development of quarries and mines. For a long time, these stresses have been studied by various methods, including the tectonophysical ones, however, in this article, for the first time ever, a reconstruction of the stress state is performed using the method of cataclastic analysis of discontinuous displacements. In total, 20 local stress states were reconstructed for the southern part of the Khibiny massif. It was found out that the stresses depend more on the morphology of the rock mass due to its rounded shape, which indicates the presence of its own stress field within the rock mass, almost independent of the external tectonic conditions. The regularity in distribution of geodynamic types of stress state is also revealed. Geodynamic types of maximum compression prevail closer to the center of the rock mass, which are replaced by geodynamic types of horizontal tension and horizontal shear towards the periphery of the rock mass.
Keywords: stress-strain state, slickenside, geodynamic type of stress state, axes of main stresses, stress field, Khibiny massif
Acknowledgements: The authors express their deep appreciation to their colleagues D.V. Zhirov and Yu.L. Rebetsky for their invaluable help in organizing the field studies and discussing the results of their work. The study was carried out within the framework of the State Assignment for the Sсhmidt Institute of Physics of the Earth of the Russian Academy of Sciences.
For citation: Bondar I.V., Marinin A.V., Sim L.A. Kinematics of minor disjunctive structures and tectonic stresses in the southern part of the Khibiny massif. Russian Mining Industry. 2023;(1 Suppl.):116–121. https://doi.org/10.30686/1609-9192-2023-S1-116-121
Article info
Received: 09.01.2023
Revised: 26.01.2023
Accepted: 29.01.2023
Information about the authors
Ivan V. Bondar – Researcher, Sсhmidt Institute of Physics of the Earth of the Russian Academy of Sciences, Moscow, Russian Federation; This email address is being protected from spambots. You need JavaScript enabled to view it.
Anton V. Marinin – Cand. Sci. (Geol. & Mineral.), Leading Researcher, Sсhmidt Institute of Physics of the Earth of the Russian Academy of Sciences, Moscow, Russian Federation
Lydia A. Sim – Dr. Sci. (Geol. & Mineral.), Leading Researcher, Sсhmidt Institute of Physics of the Earth of the Russian Academy of Sciences, Moscow, Russian Federation
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