Abstract
When the resultant of applied forces does not pass through the center of an active landmass, the landmass will rotate, giving rise to a rotational tectonic stress field. The motion of a fault along the principal stress plane is determined by the mechanic features of the plane. Tensile fractures occur on the faults in the direction of the principal extensional stress plane, and fault-depression basins will be formed under a long-term action. Thrusting and overthrusting occur on faults in the direction of the principal compressional stress plane, or folds may be formed as a result. Information on geology shows that the North China landmass, which remained stable and intact for a long time, became disjointed in the Eogene period. In the course of disjunction, anticlockwise rotation took place in the Shanxi-Hebei-Shaanxi (Jin-Ji-Shan) landmass, giving rise to the fault-depression system in its periphery. In the Pliocene epoch the landmass lost stability and its eastern boundary moved westward. As a result, the Shanxi graben system appeared and Ordos landmass was formed. Structural and mechanic features of the main faults around Jin-Ji-Shan landmass can be explained with principal stress plane of a rotational tectonic stress field.
Highlights
Abundant geological and physical data suggest a close relationship between processes that take place on Earth and in space
The above data and obtained results suggest that variations of the gravitational constant G, which are re vealed by many researchers, seem to be dependent on processes taking place on sites where field measurements of G are taken by detectors. Two types of such processes are distinguished: (1) local geophysical processes mani fested by rotational waves that occur on sites where the detectors are installed; properties of such waves are de scribed above; (2) global processes associated with defor mation of the entire Earth, which take place when gravita tional waves from sources external to Earth are passing through Earth
The results obtained in our study provide for consideration of the problem of detection of gravitational waves at a new level of quality on the basis of the idea of interactions be tween the crustal blocks and the gravitational waves [Braginsky et al, 1985]
Summary
Abundant geological and physical data suggest a close relationship between processes that take place on Earth and in space. Gravity and other influences exerted on our planet by other bodies of the so lar system itself, as well as those in the more distant Uni verse, should be taken into account Both rotation and space factors attract wider attention of researchers as modern technical capabilities of such studies have in creased immeasurably. Our study shows that natural oscillations of the Earth reflect movements in the interior, which are considered elastic, according to earthquake records in seismograms, and gravitational at the same time, according to gravity measurements For this very reason, D.D. Ivanenko, who is one of the most prominent physicists conducting theoretical studies of gravity, has demonstrated a keen interest in problems of geology and gravity [Vladi mirov, 2011]. Searching for a common ground between concepts of geodynamics and gravity is dis cussed in our publications [Vikulin, 2010, 2011, 2012]
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