Article
Article name Slopes of Uplifts Of The Earth’s Surface: Structural Impact of Mantle Plumes of Low Thermal Power
Authors Kirdyashkin A.. ,
Kirdyashkin A.. ,
Bibliographic description Kirdyashkin A. A., Kirdyashkin A. G. Slopes of Uplifts Of The Earth’s Surface: Structural Impact of Mantle Plumes of Low Thermal Power // Transbaikal State University Journal. 2023. Vol. 29, no. 4. P. 8–18. DOI: 10.2109/2227-9245-2023-29-4-8-18.
Category Earth and Environmental Sciences
DOI 55, 551.2, 551.14, 532.5
DOI 10.2109/2227-9245-2023-29-4-8-18
Article type
Annotation The flow structure, which is organized under the influence of a horizontal pressure gradient in the uplift slope is considered. The forces that cause disruptions of the uplift slope and determine its structure are investigated. The object of the study is the slopes of uplifts of the Earth’s surface. The aim of the study is to establish the conditions under which flows are created in a high-viscosity uplift slope and to determine the main forces causing the formation of slope breaks and the formation of the slope structure. It is shown that there is a horizontal pressure gradient in the uplift slope. Under this gradient horizontal flows are organized in the high-viscosity uplift slope. The viscous flow in the uplift slope is analyzed using a model of the viscous (Newtonian) fluid flow in a layer with an inclined upper (free) surface. The flow velocity distribution over the layer height is obtained. The condition for creating a block structure of the uplift slope under strain conditions is established. The dependence of the driving (gravitational) force due to the horizontal pressure gradient on the viscosity of the block is presented. It has been established that a disruption of the uplift slope flow is formed when the magnitude of the elastic deformation force of the rupture is equal to the difference between the magnitudes of the driving force and the friction force at the slope bottom. The processes occurring in the area of block separation are analyzed using data of laboratory and theoretical studies of the viscous outflow from a rectangular vessel. The dependence of the average flow velocity and the time of the first period of filling the free volume on the horizontal size of the layer are presented for different viscosities of the slope material. Expressions are obtained for lowering of the free surface level of the slope, which occurs due to the filling of the free volume between the blocks, as well as for the horizontal size of the lowering area. Based on the results of geodynamic modeling, the structure of the uplift slope is presented.
Key words geodynamic modeling, elevation slope, horizontal pressure gradient, viscous liquid, dynamic viscosity, flow velocity, driving force, elastic deformation force, free volume, lowering of the surface
Article information
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