Empirical principles of rotational-fluid hypothesis of global tectogenesis
© N.I. Pavlenkova
Geophysical and geochemical studies of the latest decades show several regularities in the crust and upper mantle structure which do not agree with the principles of many geodynamic conceptions, including the plate tectonics:
- deep roots (> 300 km) beneath the continents;
- instead of asthenosphere there are disconnected lenses (asthenolenses) even beneath mid-oceanic ridges;
- the lithosphere is on the contrary rheologically stratified;
- ancient continental rocks and 15-25 km thick crust are discovered in the oceans;
- boreholes have shown the extensive distribution of shallow-water sediments in the oceans.
To explain the observed data a rotation-fluids hypothesis is proposed. It considers regular changes in the Earth's rotation and its degasation as important sources of global geodynamics. The fluids explain the rheological and tectonic stratification of the lithosphere. In the areas where fluids streams were more intense they produced the continental crust and deep continental roots. The changes of the Earth' rotation provoke relative movements of its spheres, for example the mantle in relation to the core.