A Study on the Plate Tectonics in the Early Earth Period Based on the Core-Magma Angular Momentum Exchange

Abstract

By using a dynamical approach of core-magma angular momentum exchange, this study theoretically explains the continental formation and plate drift as well as main mountain uplifts in the early Earth period. The present mantle and lithosphere were the partial part of magma fluid layer (mantle currents) before and after the Earth's crust formation. Thus, a theory is presented regarding the driving forces of plate drift, in the form of planetary scale mantle currents. The origin of mantle currents is traced back to the formation of the solar system. It is assumed that small particles (nebula matter) orbiting the Sun assembled, and a molten sphere of primordial Earth with different minerals evenly distributed throughout the total mass came into existence. Subsequently, a process called planetary differentiation took place, as the core and mantle currents (magma layer) started separating. This will inevitably cause the Earth to spin faster, and it is presumed that the inner core first gained angular velocity, thereby spinning faster than the material found at a shallower depth. The time interval of the angular momentum exchange between the core and the magma should have lasted for at least 0.1 -0.2 billion years. Planetary scale vertical and horizontal circulations of mantle currents took place, and angular momentum exchange was realized through the vertical component. The horizontal part of the mantle currents, near the bottom of the lithosphere, became a real force to drive continental split and plate drift. The acceleration and deceleration of the core compared with the mantle currents then caused different flow directions in the two hemispheres. When the inner core rotates faster from west to east, upper mantle currents will tend to flow westwards and towards the two poles. Surface lighter materials converged towards the two poles so that two continental polar crust caps appeared when the magma surface was cooling. This caused two original su-How to cite this paper: Qian, W.H. and Du, J.

An Orthogonal Collision Dynamic Mechanism of Wave-Like Uplift Plateaus in Southern Asia

“…In Figure 1, the red dotted line indicates the location of the tropical convergence zone (TCZ) of the upper magma fluids early in the Earth's geological evolution. This convergence zone running approximately east-west orientation in southern Asia is a part of the entire TCZ along the intertropical circle [26]. The terrain on its north side is tall while the terrain on its south side is topographic troughs or low-lying zones.…”

“…According to our recent article [26], the Tibetan Plateau was formed at the beginning of Earth's geological evolution. At that time, the original crust was thin.…”

“…The trade wind airflows on both sides of the tropical convergence zone are orthogonally converged. The shear stress of the collision between them is [26],…”

“…Considering the internal dynamics of the early Earth, we study how large-scale horizontal motion energy inside the Earth can be regionally converted into vertical convective motion energy (mountain uplift). In our recent article on continental drift and orogeny [26], the study time traceback forwards to the early Earth about 4.54 billion years ago in the formation of the Earth's pristine crust, spatially considering the relative motion of the upper magma fluids caused by the exchange of angular momentum between the inner solid core and the outer magma layer. During the early geological evolution of the first loss of angular momentum in the core and the angular momentum gained by magma, the primordial continents formed at the middle and high latitudes of the two poles separated due to the eastward movement of magma fluids and the effect of Coriolis force towards the equator.…”

The Essence of Gravity Is the Expansion Tendency of the Universe after the Big Bang

“…The eastward speed is in turn affected by the deflection force of the Earth's rotation towards the equator. Thus, the upper magmatic fluid in the Northern Hemisphere exhibits a southeastward movement, and the upper magmatic fluid in the Southern Hemisphere exhibits a northeastward movement [60]. The essence of this deflection force or Coriolis force is the rotational centripetal force --the second term in Equation (18).…”