Thermochemical theory of geodynamical evolution |
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Authors: | V D Kotelkin L I Lobkovskii |
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Institution: | 1.Moscow State University,Moscow,Russia;2.Shirshov Institute of Oceanology,Moscow,Russia |
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Abstract: | Theoretical ideas based on the results of numerical modeling of mantle convection are presented. The thermochemical model
has taken into consideration such factors as two-layer structure of the mantle, formation of light substance in the D” layer
(owing to transition of metallic components into the core), and heavy substances in subduction zones (eclogite-alteration
of the oceanic crust). Numerical experiments have shown that this system allows phenomena of global mantle overturns, which
make possible to model the general pattern of the Earth’s geologic evolution. The suggested theory establishes cause-effect
relationships in the sequence of geological events and is conformed to all the empirical data. |
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