Fig 3 - uploaded by Yu. L. Rebetsky
Content may be subject to copyright.
Schemes illustrating the hypothesis of continental drift under the influence of tangential mass forces (í µí°¹ í µí¼ƒ ). 1 – continental lithosphere (plan and vertical cross-section); 2 – asthenosphere beneath continental lithosphere (crosssection ); 3 – distribution of tangential stress values (í µí¼Ž í µí¼ƒí µí¼ƒ ) in continental lithosphere of two continents that collided at the equator (from [Rebetskii, 2016]; 4 – direction of continental drift (í µí¼ˆ í µí±í µí±™ ); 5 – directions and velocity amplitudes of meridional flow (í µí¼ˆ í µí±Ž ) in asthenosphere (shear stresses í µí¼Ž í µí±Ÿí µí¼ƒ operate in the same direction); 6 – tangential mass forces in continental lithosphere (plan and vertical crosssection ); 7 – direction of additional tangential meridional stress (í µí¼Ž í µí¼ƒí µí¼ƒ ).  

Schemes illustrating the hypothesis of continental drift under the influence of tangential mass forces (í µí°¹ í µí¼ƒ ). 1 – continental lithosphere (plan and vertical cross-section); 2 – asthenosphere beneath continental lithosphere (crosssection ); 3 – distribution of tangential stress values (í µí¼Ž í µí¼ƒí µí¼ƒ ) in continental lithosphere of two continents that collided at the equator (from [Rebetskii, 2016]; 4 – direction of continental drift (í µí¼ˆ í µí±í µí±™ ); 5 – directions and velocity amplitudes of meridional flow (í µí¼ˆ í µí±Ž ) in asthenosphere (shear stresses í µí¼Ž í µí±Ÿí µí¼ƒ operate in the same direction); 6 – tangential mass forces in continental lithosphere (plan and vertical crosssection ); 7 – direction of additional tangential meridional stress (í µí¼Ž í µí¼ƒí µí¼ƒ ).  

Source publication
Article
Full-text available
The author continues to investigate additional planetary-level stresses that occur in the crust due to distributed tangential mass forces. Such forces may be related to the daily rotation of the Earth and movements of the relatively solid core relative to the geocenter. In [Rebetskii, 2016], he discusses how the tangential mass forces in the contin...

Similar publications

Article
Full-text available
Lithospheric yield stress is a key parameter in controlling tectonic processes. Using high resolution, 2D numerical modeling, we calculate the yield stress for a range of conditions appropriate to the early-to-mid Archean Earth, including hotter mantle potential temperatures and Moho temperatures. We then evaluate its effect on generating tonalite-...
Article
Full-text available
Illite-rich size-fractions (<0.2, <0.4, 0.4-1, 0.4-2 and <2 μm) of Cambrian, Permian, Triassic and Jurassic calcschis- ts, shales and dolostones from Pb-Zn ore-district of the southeastern French Massif Central were dated by the K-Ar method, and some by the Pb-Pb method after removal of the Pb external to the illite particles. The combined minera-...
Article
Full-text available
Plain Language Summary In this study, we explore the Earth's continental crust evolution before 3.0 billion years ago, a period characterized by limited preserved ancient rocks. We focus on zircon from igneous rocks, which provides a more reliable petrogenetic record than detrital zircon. Our study challenges the widely observed increase in detrita...
Article
Full-text available
The tectonic evolution and the nature of the Earth’s crust beneath the Laxmi Ridge, located in the northern part of the Arabian Sea, have been a subject of considerable debate for a long time. Existing geodynamic models show signs of both continental and oceanic type crust beneath this ridge. In the present study, high-resolution satellite gravity...
Article
Full-text available
This paper presents hydro-geodynamics and geodynamics of the Southern Cis-Urals region. It focuses on geodynamics and seismicity induced by hydrocarbon production by summarizing the published case studies. Natural and man-made changes in bowels of the Earth are usually accompanied by tectonic movements and deformations of earth's surface, which is...

Citations

... The articles [Rebetsky, 2016;Rebetsky and Myagkov, 2020;Tserklevych et al., 2017;Tserklevych and Shylo, 2018;Tserklevych et al., 2019] consider the role of (TMF) in the occurrence of lateral movements of lithospheric plates. The TMF values were calculated on the basis of data on the differences in the parameters of two global rotation ellipsoids. ...
... The article [Rebetsky, 2016] shows that the coefficient of dynamic compression of the Earth equal to 1/305.5 corresponds well to the average polar compression of two ellipsoids of rotation that approximately describe the shape of the Earth's physical surface separately in its continental and oceanic parts. Thus, the physical surface of the Earth is best described by an ellipsoid that has less polar compression than the reference ellipsoid (1/298.25), ...
Article
Full-text available
The study aims to determine and interpret the distribution of the global tangential mass force (TMF) vector field by azimuthal orientation and intensity. Using cluster and correlation analysis, we compared the direction of the TMF vector field with the direction of movement of permanent GNSS stations and the direction of movement of the GSRM model continental velocities from the Global Strain Rate Map Project. Methodology. The author continues their study of additional planetary stresses in the lithosphere caused by distributed mass forces. The forces in question may be linked to the repositioning of the Earth's lithosphere, which can create stresses aimed at aligning the distribution of lithospheric masses with the geoid's figure. This repositioning happens through the mechanism of gravitational forces and the principle of minimum potential energy. The presence of a deviation of the plum line from the normal to the surface of the solid Earth determines the appearance of TMF acting in the upper shell of the Earth. It is proposed to calculate the amplitudes and directions of the vectors of such TMF based on data regarding the difference in the parameters of two global ellipsoids that approximate the physical surface of the lithosphere and the geoid. Originality. For the modern era, the value of the angle of rotation between the smallest axis of the ellipsoid approximating the surface of the lithosphere and the axis of rotation of the Earth is 2.6°. The distribution of the TMF vector field is consistent with the contours of the continents, i.e., the arrows of the vectors indicate the directions of lateral movement of tectonic plates and the movement of continents during the Earth's evolution. As a result of the change in the orientation of the ellipsoid describing the lithosphere, an updated field of potential horizontal forces is formed, which, by the conservation of the momentum of motion, move lithospheric masses and generate stresses and deformations in the lithospheric shell. Since the TMF has different directions and intensities, a cluster analysis of the TMF distribution was performed. It revealed certain regularities in the distribution of these parameters. We also compared the directions of the TMF vector field with the directions of movement of permanent GNSS stations and the directions of movement of model velocities of the continents of the GSRM (digital model of the tensor field of the global velocity gradient). Scientific novelty. The study detailed the peculiarities of the connection between the directions of the TMF vector field, the directions of movement of permanent GNSS stations, and the ones of the model velocities of the GSRM continents. Studies of the TMF, which arise as a result of the reorientation of the thin solid shell of our planet, have shown that a deformation field of shear is formed on its surface. In our opinion, this is one of the likely factors of the process that triggers global movements of lithospheric blocks. As a result, the shape of the lithosphere is transformed, which is characterized by a change in the size of the axes of the ellipsoids describing the surface of the lithosphere and their orientation. Practical significance. The research results make it possible to more reliably interpret the peculiarities of the TMF distribution. These forces can trigger mechanisms for discharging accumulated stresses, which is important for studying seismicity.
Article
Full-text available
The work is aimed at revealing a possible connection between seismic activity and cosmic-ray muon fluxes capable of penetrating into the Earth’s crust and generating a nuclear electromagnetic cascade in a tense seismically active medium, leading to the formation of microcracks, the opening of which is accompanied by the generation of acoustic and, under certain conditions, seismic energy as predicted by Tsarev and Chechin (Atmospheric muons and high-frequency seismic noise. In: Preprint of the FIAN, vol 179, 1988). The data of the underground installation (in a well at a depth of 52 m) for monitoring geoacoustic signals correlated in time with the flow of high-energy cosmic-ray muons generated in extensive atmospheric showers implemented on the basis of the experimental complex “ATHLET” in the Tien Shan High-Altitude Scientific Station of the Physical Institute of the Russian Academy of Sciences were used. It is found that the daily number of acoustic pulses increases significantly before and during appreciable regional earthquakes. The most pronounced pulsed emissions of acoustic energy, correlated in time with the flow of high-energy cosmic-ray muons generated in extensive atmospheric showers, are followed by an increasing seismic activity in the region, that support idea that penetrating into Earth’s crust the flux of cosmic-ray muons may become a “trigger” of earthquake.
Article
Full-text available
The estimated rates of upper mantle sublithospheric flows in the Hawaii–Emperor Range and Ethiopia–Arabia–Caucasus systems are reported. In the Hawaii–Emperor Range system, calculation is based on motion of the asthenospheric flow and the plate moved by it over the branch of the Central Pacific plume. The travel rate has been determined based on the position of variably aged volcanoes (up to 76 Ma) with respect to the active Kilauea Volcano. As for the Ethiopia–Arabia–Caucasus system, the age of volcanic eruptions (55–2.8 Ma) has been used to estimate the asthenospheric flow from the Ethiopian–Afar superplume in the northern bearing lines. Both systems are characterized by variations in a rate of the upper mantle flows in different epochs from 4 to 12 cm/yr, about 8 cm/yr on average. Analysis of the global seismic tomographic data has made it possible to reveal rock volumes with higher seismic wave velocities under ancient cratons; rocks reach a depth of more than 2000 km and are interpreted as detached fragments of the thickened continental lithosphere. Such volumes on both sides of the Atlantic Ocean were submerged at an average velocity of 0.9–1.0 cm/yr along with its opening. The estimated rates of the mantle flows clarify the deformation properties of the mantle and regulate the numerical models of mantle convection.