RUSSIAN JOURNAL OF EARTH SCIENCES VOL. 10, ES4001, doi:10.2205/2007ES000218, 2008

1. Introduction. Status and Approach to Solution of the Problem

2007ES000218-fig01
Figure 1
[2]  Progress in accumulation of geological-geophysical information on the structure of the Atlantic Ocean floor (Figure 1) gave rise to persistent recognition of facts poorly explicable in terms of classical geodynamical model of the ocean. Those factors are:

[3]  The list is far from being complete but the above facts imply a gap between facts and working geodynamic model meant to explain them. The latter is based on the mantle convection when ridge push by extension along its axis, slab pull and dredging of the lithosphere by astenospheric current resulted from convection are considered to be the main forces responsible for surface dynamics of the lithosphere masses. The forces mentioned and mechanism of their energy supply cannot explain their and other factors appearance by deficiency of motion horizontal component nonorthogonally to the MAR and because a discrete pattern of parameters of magmatic processes operating along the MAR do not agree with the notion of continuous ascending substance flow along the divergent zone of the convective cell. In other words: lithospheric masses move over the Earth's surface in a more complex way than that stipulated by the geodynamic model.

[4]  Noteworthy, that discrete conditions of basalt magma formation also poorly correlate with the usual notion of the convective cell system. This contradiction cannot be resolved even when we proceed from the assumption of a possible southward migration of the Atlantic superplumes along the Mid-Atlantic Ridge axis [Dmitriev et al., 2001].

[5]  The questions stated cannot be resolved in the context of a single paper. The authors only generalize new covering original data equally cover the offshore area with the classification of geodynamic environments. Our investigation will make possible the solution of fact - theory discrepancy by compilation of geodynamical maps and better understanding of physical meaning of types recognized.

[6]  Thus, problems are the following:


RJES

Citation: Sokolov, S. Yu., N. S. Sokolov, and L. V. Dmitriev (2008), Geodynamic zonation of the Atlantic Ocean lithosphere: Application of cluster analysis procedure and zoning inferred from geophysical data, Russ. J. Earth Sci., 10, ES4001, doi:10.2205/2007ES000218.

Copyright 2008 by the Russian Journal of Earth Sciences

Powered by TeXWeb (Win32, v.2.0).